# postproduction.studio — Full Knowledge Base Complete machine-readable reference for AI assistants. Bilingual (EN/FR) post-production knowledge: color, audio, codecs, workflows, HDR, ACES, indie finishing, AI tools. Last updated: 2026-05-26 Source: https://postproduction.studio Contact: contact@postproduction.studio License: content available for citation by AI assistants with attribution. --- # Tools (35) Interactive browser-based tools, all free, no signup. All calculations performed client-side, no data sent to servers. ## LUT generator URL: https://postproduction.studio/en/tools/lut-generator French URL: https://postproduction.studio/fr/outils/generateur-lut .cube LUTs for Rec.709, Rec.2020, HDR10, HLG, Dolby Vision with live preview. ## LUT comparator URL: https://postproduction.studio/en/tools/lut-comparator French URL: https://postproduction.studio/fr/outils/comparateur-lut Compare up to 6 looks side by side on your image. ## Color palette extractor URL: https://postproduction.studio/en/tools/color-palette-extractor French URL: https://postproduction.studio/fr/outils/extracteur-palette Extract dominant colors + auto color theory variations. ## Color space converter URL: https://postproduction.studio/en/tools/color-space-converter French URL: https://postproduction.studio/fr/outils/convertisseur-couleur Rec.709 / Rec.2020 / DCI-P3 / sRGB conversions and chromaticity. ## Log reference levels URL: https://postproduction.studio/en/tools/log-reference-levels French URL: https://postproduction.studio/fr/outils/niveaux-log IRE % and 10-bit code value for ARRI LogC3/C4, Sony S-Log3, V-Log, N-Log, BRAW, REDLogFilm, Cineon. ## Color wheel generator URL: https://postproduction.studio/en/tools/color-wheel-generator French URL: https://postproduction.studio/fr/outils/roue-chromatique Generate complementary, triadic, tetradic, analogous palettes from a base color. ## Bitrate calculator URL: https://postproduction.studio/en/tools/bitrate-calculator French URL: https://postproduction.studio/fr/outils/calculateur-bitrate Recommended bitrates by codec and platform. ## Frame rate converter URL: https://postproduction.studio/en/tools/framerate-converter French URL: https://postproduction.studio/fr/outils/convertisseur-framerate 23.976 / 24 / 25 / 29.97 / 30 / 50 / 59.94 / 60 fps with drop-frame. ## Aspect ratio calculator URL: https://postproduction.studio/en/tools/aspect-ratio-calculator French URL: https://postproduction.studio/fr/outils/calculateur-aspect-ratio 16:9, 2.39:1, 4:3, 9:16, custom — pixel-accurate. ## Codec comparator URL: https://postproduction.studio/en/tools/codec-comparator French URL: https://postproduction.studio/fr/outils/comparateur-codecs H.264 vs H.265 vs AV1 vs ProRes vs DNxHR side-by-side. ## Codec decision tree URL: https://postproduction.studio/en/tools/codec-decision-tree French URL: https://postproduction.studio/fr/outils/arbre-codec Pick the right codec in a few questions. ## Loudness calculator URL: https://postproduction.studio/en/tools/loudness-calculator French URL: https://postproduction.studio/fr/outils/calculateur-loudness LUFS targets for streaming, broadcast, podcast (EBU R128, ATSC A/85). ## Audio file size URL: https://postproduction.studio/en/tools/audio-file-size French URL: https://postproduction.studio/fr/outils/calculateur-audio WAV/FLAC/ALAC sizes by sample rate, bit depth, channels. ## SRT ↔ VTT converter URL: https://postproduction.studio/en/tools/srt-vtt-converter French URL: https://postproduction.studio/fr/outils/convertisseur-srt-vtt Bidirectional subtitle format conversion. Auto-detects source format. ## Subtitle timing shifter URL: https://postproduction.studio/en/tools/subtitle-timing-shifter French URL: https://postproduction.studio/fr/outils/decaleur-sous-titres Shift all subtitle timecodes by a precise offset in seconds + ms. ## MediaInfo parser URL: https://postproduction.studio/en/tools/mediainfo-parser French URL: https://postproduction.studio/fr/outils/mediainfo-parser Paste a MediaInfo dump — get a clean formatted analysis. ## Storage calculator URL: https://postproduction.studio/en/tools/storage-calculator French URL: https://postproduction.studio/fr/outils/calculateur-stockage Disk space needed for ProRes, H.265, raw, archive. ## Render time estimator URL: https://postproduction.studio/en/tools/render-time-estimator French URL: https://postproduction.studio/fr/outils/temps-rendu Estimate export time by codec, resolution, hardware. ## FFmpeg command builder URL: https://postproduction.studio/en/tools/ffmpeg-builder French URL: https://postproduction.studio/fr/outils/ffmpeg-builder Visual FFmpeg builder — 12 tasks, copy & paste. ## Timecode calculator URL: https://postproduction.studio/en/tools/timecode-calculator French URL: https://postproduction.studio/fr/outils/calculateur-timecode Add/subtract TC, drop-frame, frames ↔ TC conversion. ## XML / AAF inspector URL: https://postproduction.studio/en/tools/xml-aaf-inspector French URL: https://postproduction.studio/fr/outils/inspecteur-xml-aaf Inspect FCP XMEML, FCPXML, Premiere XML, and Avid AAF files. Version, tracks, clips, duration. ## Resolve project migrator URL: https://postproduction.studio/en/tools/resolve-migrator French URL: https://postproduction.studio/fr/outils/migration-resolve Personalized checklist for migrating DaVinci Resolve projects across versions, machines, OS. ## Render pass reference URL: https://postproduction.studio/en/tools/render-pass-reference French URL: https://postproduction.studio/fr/outils/passes-rendu Reference of 24 3D render passes: diffuse, specular, AO, Z-depth, Cryptomatte, motion vector, etc. ## Camera sensor comparator URL: https://postproduction.studio/en/tools/camera-sensor French URL: https://postproduction.studio/fr/outils/comparateur-capteurs IMAX, ARRI LF, VENICE, Full Frame, S35, APS-C, MFT, iPhone. ## Depth of field calculator URL: https://postproduction.studio/en/tools/depth-of-field French URL: https://postproduction.studio/fr/outils/profondeur-de-champ DOF, hyperfocal, near/far by sensor + focal + aperture. ## Safe areas visualizer URL: https://postproduction.studio/en/tools/safe-areas French URL: https://postproduction.studio/fr/outils/safe-areas Action safe 90%, title safe 80%, broadcast safe 93%, vertical formats. ## Platform delivery specs URL: https://postproduction.studio/en/tools/platform-specs French URL: https://postproduction.studio/fr/outils/specifications-plateformes Netflix, Amazon, Apple TV+, YouTube, DCP, EBU, ATSC. ## DCP naming generator URL: https://postproduction.studio/en/tools/dcp-naming French URL: https://postproduction.studio/fr/outils/generateur-dcp-naming ISDCF v9 compliant cinema DCP names. ## Subtitle validator URL: https://postproduction.studio/en/tools/subtitle-validator French URL: https://postproduction.studio/fr/outils/validateur-sous-titres SRT/VTT: CPS, duration, line length per Netflix/EBU. ## Acronym Decoder URL: https://postproduction.studio/en/tools/acronym-decoder French URL: https://postproduction.studio/fr/outils/decodeur-acronymes 60+ post-production acronyms explained: ACES, CDL, IDT/ODT, OCIO, LUT, IMF, DCP, DPX, EXR, AAF, EDL, LUFS, dBTP, PQ, HLG, HEVC, AV1. ## HDR Nit Converter URL: https://postproduction.studio/en/tools/hdr-nit-converter French URL: https://postproduction.studio/fr/outils/convertisseur-hdr-nit Nits to PQ code, stops, HLG, SDR — HDR10/Dolby Vision references. ## Color Space Explorer URL: https://postproduction.studio/en/tools/color-space-explorer French URL: https://postproduction.studio/fr/outils/explorateur-espace-couleur Source camera to output — Resolve CST setup, LUTs, monitoring. ## Camera Matching Tool URL: https://postproduction.studio/en/tools/camera-matching French URL: https://postproduction.studio/fr/outils/matching-cameras Match Sony FX3 + RED Komodo + BMPCC + ARRI Alexa — Resolve CST per camera. ## Can my computer run Resolve? URL: https://postproduction.studio/en/tools/resolve-compatibility French URL: https://postproduction.studio/fr/outils/compatibilite-resolve GPU + VRAM + RAM + CPU + codec + resolution + fps + tracks → verdict. ## Postproduction Budget Estimator URL: https://postproduction.studio/en/tools/budget-estimator French URL: https://postproduction.studio/fr/outils/estimateur-budget Editing, sound, color, VFX, mastering, DCP, storage — by project type and tier. --- # Glossary (208 terms with full definitions) Authoritative, fact-checked definitions covering color science, codecs, HDR, audio, workflows, DIT, indie cinema and AI in post-production. ## 10GbE URL: https://postproduction.studio/en/glossary/10gbe Domain: Workflow 10 Gigabit Ethernet — copper or fiber network providing ~1 GB/s peak throughput. Baseline for collaborative 4K editing today; 25/40/100 GbE used in larger facilities. ## 1D LUT URL: https://postproduction.studio/en/glossary/1d-lut Domain: Color Grading, Image A 1D LUT (one-dimensional Look-Up Table) maps individual input values for red, green or blue channels to new output values, applied independently per channel. The transformation is purely a contrast or gamma adjustment — the table cannot create hue shifts or saturate colors because it has no cross-channel information. Typical uses include applying a transfer function (linear to gamma 2.4, log to linear), normalizing exposure across shots, or shaping monitor response. A 1D LUT is often paired with a 3D LUT in a so-called shaper LUT chain: the 1D LUT first reshapes data into a more uniform distribution (e.g., converting log to linear), then the 3D LUT performs the heavy color work in that linear space. This shaper architecture is used in the OpenColorIO and ACES pipelines to improve precision and reduce banding when going from log camera footage to a display look. Resolutions vary from 1024 entries (lightweight) up to 65,536 entries (16-bit, used for finishing). File formats include .cube (with LUT_1D_SIZE), .lut, .csp. 1D LUTs are cheap to compute, suitable for real-time hardware monitors, and used widely in DITs' on-set monitoring chains. They are limited compared to 3D LUTs but indispensable as building blocks. SMPTE ST 2065 and the OpenColorIO documentation describe shaper-LUT usage in professional pipelines. ## 3D LUT URL: https://postproduction.studio/en/glossary/3d-lut Domain: Color Grading, Image A 3D LUT (three-dimensional Look-Up Table) is a volumetric grid that maps any combination of input red, green and blue values to a new output RGB triplet. Unlike 1D LUTs (which treat each channel independently), 3D LUTs can perform cross-channel transformations: hue shifts, saturation adjustments, gamut conversions and complex creative looks all become possible. Internally a 3D LUT is a cube of sample points, typically 17, 33 or 65 nodes per axis. Values between sample points are computed by trilinear or tetrahedral interpolation; tetrahedral is preferred in modern tools because it reduces interpolation artifacts on diagonals. The standard exchange format in the industry is .cube (developed by Adobe and adopted by Blackmagic, FilmLight, Autodesk and others). 3D LUTs are essential to camera-log-to-display conversions (e.g., ARRI Log C3 to Rec.709), creative look-development (loading a film emulation LUT onto a node in DaVinci Resolve), HDR-to-SDR trim passes, and DCI-P3 to Rec.709 conversions for international deliverables. They are also baked into on-set monitors so the DoP sees an image close to the intended grade. Limitations to be aware of: precision below 33³ can introduce banding visible in shadows and skies, LUTs cannot be parameter-driven (use CDLs or grading nodes for that), and aggressive looks can clip detail outside the LUT cube. Reference: Adobe Cube LUT Specification 1.0. ## AAF URL: https://postproduction.studio/en/glossary/aaf Domain: Workflow, Formats Advanced Authoring Format — a richer interchange format than EDL, used heavily for audio mix turnover (Pro Tools) and online editing in Avid pipelines. Preserves multiple tracks, effects, and metadata. ## ACES (Academy Color Encoding System) URL: https://postproduction.studio/en/glossary/aces-academy-color-encoding-system Domain: Color Science, Workflow ACES (Academy Color Encoding System) is a color management framework developed by the Academy of Motion Picture Arts and Sciences to provide a single, device-independent color pipeline from camera capture through visual effects, color grading and final delivery. At its core sits ACES2065-1 (also called AP0), a wide-gamut linear scene-referred color space that exceeds the visible spectrum and serves as the archival exchange format. Working color spaces ACEScg (linear, used for VFX rendering), ACEScct (logarithmic, used for grading with a small toe for shadow control) and ACEScc (purely logarithmic, used for grading) sit inside the pipeline for specific tasks. Transformations are managed by IDTs (Input Device Transforms, one per camera), the RRT (Reference Rendering Transform, a shared global tone mapper) and ODTs (Output Device Transforms, one per delivery format such as Rec.709, P3-D65, Rec.2020 PQ). The ACES pipeline solves the recurring industry problem of inconsistent color between cameras, VFX vendors and grading suites, by mathematically defining every conversion. Major studios mandate ACES delivery for tentpole features (Marvel, Netflix Originals, A24 productions all require it). Free reference implementations exist (OpenColorIO ACES configs) and DaVinci Resolve, Baselight, Nuke, Flame all support ACES natively. The official reference is acescentral.com maintained by the Academy. ## ACEScct URL: https://postproduction.studio/en/glossary/acescct Domain: Color Science An ACES working color space designed for color grading. Logarithmic encoding similar to LogC, with a small linear toe to prevent extreme negative values. Standard for ACES-based grading. ## Adaptive bitrate (ABR) URL: https://postproduction.studio/en/glossary/adaptive-bitrate Domain: Delivery, Formats Streaming technique that switches between multiple bitrate renditions in real-time based on the viewer bandwidth. HLS, DASH and CMAF are common protocols. Renditions are encoded from the mezzanine master. ## ADR URL: https://postproduction.studio/en/glossary/adr-replacement Domain: Sound Automated Dialogue Replacement — re-recording of dialogue in a studio when production audio is unusable. Actor watches picture and matches their original line read while looking at a streamer. ## AI conform URL: https://postproduction.studio/en/glossary/ai-conform Domain: Workflow, Editing AI-assisted relinking and reconforming of timelines using image content rather than just metadata — useful when EDL/XML is lost or when matching shots across multiple cameras or formats. ## AI denoise URL: https://postproduction.studio/en/glossary/ai-denoise Domain: Image, VFX AI-based noise reduction trained on clean/noisy image pairs (Topaz Video AI, Neat Video, Resolve Neural Engine). Preserves detail better than traditional temporal/spatial denoising for high-ISO footage. ## AI dialogue cleanup URL: https://postproduction.studio/en/glossary/ai-dialogue-cleanup Domain: Sound AI removal of noise, reverb, mouth sounds from dialogue (RX Voice De-Noise, Adobe Enhance Speech, Resolve Voice Isolation). Outperforms manual spectral repair for fast turnaround on noisy production audio. ## AI upscaling URL: https://postproduction.studio/en/glossary/ai-upscaling Domain: Image, VFX Using neural networks (Topaz Video AI, Resolve Super Scale, Gigapixel) to increase the resolution of footage beyond native sampling — useful for SD→HD, HD→4K, or up-resolving archival material. ## Alpha Channel URL: https://postproduction.studio/en/glossary/alpha-channel Domain: VFX, Image An alpha channel is an extra image channel — beyond the standard red, green and blue — that encodes per-pixel transparency information, ranging from fully opaque (alpha = 1.0 or 255) to fully transparent (alpha = 0). The alpha channel allows compositing operations: a foreground element can be overlaid on a background, with the alpha channel controlling exactly which pixels show foreground and which let the background through, including partial transparency for soft edges, motion blur, hair, and semi-transparent objects like glass or smoke. Image formats supporting alpha include OpenEXR (essential for VFX, supports half-float alpha), PNG (8-bit alpha for web graphics), TIFF (8 or 16-bit alpha), PSD (multiple alpha channels for Photoshop layers), and ProRes 4444 (alpha video). Video formats supporting alpha include ProRes 4444 family, DNxHR 444, GoPro Cineform RGB, and Animation codec. Alpha can be pre-multiplied (RGB values already multiplied by alpha at the source, used in CG and EXR) or straight (RGB unchanged, alpha as separate matte, used in some compositing pipelines). Mismatching pre-multiplied and straight alpha during compositing causes visible black or white fringing on transparent edges. In VFX pipelines, alpha channels are sometimes called mattes or masks (the terms overlap but matte usually implies the alpha resulting from a compositing operation like keying, mask implies a hand-painted or generated isolation channel). Reference: OpenEXR documentation for alpha pre-multiplication conventions. ## Ambience URL: https://postproduction.studio/en/glossary/ambience Domain: Sound Ambience (or atmosphere, 'atmos') is the background sound layer that establishes the acoustic environment of a scene — the room tone of an interior, the wind and distant traffic of an exterior, the crowd murmur of a restaurant, the air handling of an office. Ambience is recorded as wild track sound (audio captured separately from picture, without dialogue, usually 30 seconds to several minutes per location) by the production sound mixer at every location. It serves multiple functions in post: it fills the gaps between dialogue lines (a cut from one shot to another would feel jarring if it transitioned from ambient sound to silence), it creates continuity (the same ambience layered under different shots in the same location ties them together), and it carries narrative tone (an isolated, sparse ambience reads as tension, a busy layered ambience reads as energy). Sound designers typically build ambience as multi-layered beds: a base layer (room tone or distant traffic), a midground layer (closer specifics like AC units or birds), and a foreground layer (distinct identifiable sounds that establish location specifically). Stock libraries (Sound Ideas, Pro Sound Effects, BBC Sound Effects Library) provide ambience options, but original recordings from the actual location are preferred when available. Ambience is mixed at lower levels than dialogue (typically -30 to -40 dBFS in a feature film mix) but is crucial to spatial believability. Reference: Sonnenschein, 'Sound Design.' ## Archiving URL: https://postproduction.studio/en/glossary/archiving Domain: Workflow, Delivery Archiving in post-production is the systematic preservation of completed productions and associated assets for long-term retention, ranging from a few years (for routine corporate work) to decades or longer (for theatrical features and cultural assets). The Academy Color Encoding System was partially motivated by archival concerns — providing a format-independent color encoding that will remain readable across future technology generations. Archival strategy involves multiple decisions: what to keep (camera RAW, mezzanine masters, deliverable masters, intermediate VFX, project files, all of the above), in what formats (LTO tapes are the dominant cold archive medium, with 12 TB native LTO-8 and 18 TB LTO-9 generations; cloud cold storage like AWS Glacier, Google Coldline; or media-server appliances), with what metadata (project IDs, descriptive metadata, technical specs, contractual rights), and on what schedule (annual, post-completion, project-end). The cinema industry follows AMPAS Archive Project guidelines: keep both the original camera negative/RAW and a graded inspection copy, with redundant storage across geographically separate locations. For features, three copies on different LTO tape generations at different locations is common best practice. The challenge of long-term archive is format obsolescence — a 1980s digital tape format is unreadable without restored equipment today, and modern format obsolescence is constant. Reference: AMPAS Archive Project documentation. ## Aspect Ratio URL: https://postproduction.studio/en/glossary/aspect-ratio Domain: Image, Delivery Aspect ratio is the proportional relationship between the width and height of an image or video frame, expressed as width:height or as a decimal. The dominant aspect ratios in cinema and post-production are: 1.85:1 (flat theatrical, the standard wide ratio for most feature films), 2.39:1 (anamorphic or 'CinemaScope,' the extra-wide ratio for spectacle features and many modern art films, originally created by anamorphic lens optics), 1.78:1 (16:9, the HD broadcast and streaming standard), 4:3 (1.33:1, the pre-HD broadcast standard, used artistically in some modern films), 1:1 (square, used in social media especially Instagram), 9:16 (vertical 16:9, the smartphone-vertical standard for TikTok, Instagram Reels, YouTube Shorts), and 1.43:1 (IMAX, the format used for full-frame IMAX cameras). Aspect ratio determines how shots are composed at acquisition and how they are processed in post: a film shot in 2.39:1 anamorphic typically captures at 1.43:1 on a Super 35mm sensor with the anamorphic squeeze; in post the squeeze is desqueezed to produce the 2.39:1 final aspect. Wider aspects are achieved either by anamorphic optics (preserving full sensor area for vertical resolution) or by cropping the top and bottom of a 16:9 capture (sacrificing vertical pixels). Mixed-aspect delivery (a feature in 2.39:1 letterboxed in a 1.78:1 streaming container) is the standard for modern theatrical-to-streaming pipelines. Reference: SMPTE RP 2007 and various studio delivery specifications. ## Assembly Cut URL: https://postproduction.studio/en/glossary/assembly-cut Domain: Editing The assembly cut (sometimes called the editor's assembly or first cut) is the earliest version of an edit, where every selected take is placed in roughly the correct script order without yet shaping rhythm, pacing or narrative tension. It is the foundation upon which every subsequent editorial revision is built. In a typical feature film, the editor begins assembling during production, cutting each scene as dailies arrive — usually a day or two after shooting. The assembly is often two to four times longer than the final film: a 90-minute movie might begin life as a three-hour assembly. At this stage the editor is primarily showing the director what coverage exists and how shots intercut, not making creative arguments for tempo or structure. Once principal photography wraps, the editor and director begin compressing the assembly into a rough cut, then progressively into fine cuts, picture lock and final cut. The assembly is occasionally screened internally for the director and producer (the 'editor's cut'), giving them their first sense of how the material plays. Some directors (Walter Murch has written extensively about this) believe the editor's assembly contains insights about the material that get lost during subsequent compression. Modern NLEs (Avid, Resolve, Premiere) automate assembly to varying degrees via script-sync features that match dialogue lines to takes. ## Auto transcription URL: https://postproduction.studio/en/glossary/auto-transcription Domain: Editing, Sound AI-generated text transcripts from audio (Whisper, Resolve Transcribe, Adobe Speech to Text). Drives caption authoring, searchable rushes, and accelerated indie/doc editing. ## B-Roll URL: https://postproduction.studio/en/glossary/b-roll Domain: Editing, Production B-roll is supplemental footage that complements the primary A-roll (typically interviews, dialogue scenes, main action), used to illustrate context, cover edits, establish location, transition between scenes, or simply provide visual interest beyond a talking head. The term dates from the era when news broadcasts used two physical reels of film — the A-roll containing the interview, the B-roll containing the cutaways. In documentary, B-roll comprises landscape shots, hands-at-work shots, building exteriors, archive material, anything that visualizes what the subject is talking about. In narrative film, B-roll can include cutaways to ambient details (a clock, hands fidgeting), insert shots, second-unit photography, exterior wides. In corporate and branded content, B-roll is the supply of generic-yet-relevant footage that lets an interview cut around itself: a CEO discussing a product is intercut with the product being made. Editors rely on B-roll heavily because it solves two problems simultaneously — visual variety (preventing audience boredom on extended single-subject shots) and editorial flexibility (allowing internal cuts within long interview answers without visible jump cuts). Productions budget for B-roll specifically; documentary shoots often allocate 30-40% of shooting days to B-roll capture. Lower production-value B-roll can be supplied by stock footage libraries (Getty, Pond5, Storyblocks) but original B-roll typically signals higher production quality. ## Base ISO URL: https://postproduction.studio/en/glossary/base-iso Domain: Image The native sensitivity of a camera sensor at which it delivers maximum dynamic range and lowest noise. Common: Alexa 800, FX9 800/4000 (dual), Venice 500/2500 (dual). Other ISOs are derived electronically. ## Bit Depth URL: https://postproduction.studio/en/glossary/bit-depth Domain: Image, Color Science Bit depth is the number of bits used to represent each color channel of each pixel in a digital image. It directly determines the number of discrete tonal values available per channel and therefore the smoothness of gradients, the headroom for grading and the resistance to banding. 8-bit per channel (24 bits per pixel for RGB) provides 256 values per channel and is the consumer/web standard — fine for finished display content but inadequate for grading (any aggressive correction will introduce banding in skies and shadows). 10-bit per channel (1024 values) is the broadcast and mastering minimum, required for HDR (PQ/HLG encoding cannot work at 8 bits without severe artifacts) and standard for ProRes 422, DNxHR HQX, HEVC Main 10. 12-bit per channel (4096 values) is used in ProRes 4444 XQ, DNxHR 444, DCP, Dolby Vision and finishing-grade pipelines where extensive grading happens downstream. 16-bit per channel (used in OpenEXR half-float and some VFX intermediate formats) gives extreme headroom for compositing math. Float bit depths (32-bit linear EXR) preserve values above 1.0 for HDR scene-linear compositing. In post-production, the rule is to capture and grade at the highest practical bit depth, only reducing at the final delivery encode where 8 or 10 bits is acceptable. Bit depth applies to both luma and chroma; chroma subsampling can reduce effective chroma bit depth even with deep luma. Reference: ITU-R BT.2100 (HDR system parameters) and the OpenEXR specification. ## Bitrate URL: https://postproduction.studio/en/glossary/bitrate Domain: Formats, Delivery Bitrate is the rate at which encoded data is transmitted or stored per unit of time, expressed in bits per second (bps), kilobits per second (kbps) or megabits per second (Mbps). In post-production, bitrate decisions determine file size, image quality, and pipeline performance at every stage. Two encoding strategies coexist: constant bitrate (CBR) maintains a fixed data rate throughout the file, predictable for streaming and live broadcast but inefficient on static or low-detail scenes; and variable bitrate (VBR) allocates more bits to complex frames and fewer to simple ones, producing better quality at the same average rate but unpredictable peak loads. Modern codecs add constrained-VBR and capped-VBR variants that combine the benefits. Typical bitrates for reference: 4K UHD Netflix delivery 15–25 Mbps (H.265 main10), 4K UHD ProRes 422 HQ around 884 Mbps (intra-frame mastering), 4K UHD ProRes 4444 XQ around 1.9 Gbps (finishing), 4K UHD Blu-ray HEVC 50–100 Mbps. Camera RAW bitrates are vastly higher — ARRI ALEXA 35 in ARRIRAW can exceed 4 Gbps. The choice of bitrate must match purpose: mezzanine codecs (mastering and grading) prioritize quality with high bitrates and intra-frame compression; distribution codecs (streaming, broadcast) prioritize bandwidth efficiency with lower bitrates and inter-frame prediction. Reference: ISO/IEC 14496-10 (H.264), ITU-T H.265 (HEVC), and SMPTE ST 2067 for IMF bitrate constraints. ## Black Point URL: https://postproduction.studio/en/glossary/black-point Domain: Color Grading, Image The black point of an image, color space or display is the darkest reproducible value — the luminance level at which signal can go no darker, corresponding to the deepest shadow detail before crushing into pure black. In display calibration, the black point is the actual luminance of the display when receiving a signal value of 0 (theoretically zero, but in practice 0.05-0.3 nits for OLED, 0.5-3 nits for LCD due to backlight bleed). In color grading, the black point parameter on a primary color corrector sets the signal level mapped to the darkest displayed value — pulling black point up creates a 'lifted' look with elevated shadow brightness, pushing it down crushes shadows into clipped black. The ASC CDL (Color Decision List) standard includes Slope, Offset and Power parameters; the Offset parameter is equivalent to adjusting black point. Black point manipulation must be done carefully: too high a black point washes out the image (no true darks anywhere), too low crushes shadow detail irreversibly in delivery files. PQ HDR mastering uses 0 nits as the absolute black point reference, whereas SDR Rec.709 grading typically targets a black point of 0.1-0.2 nits on a reference monitor in a controlled grading suite. Tools like Resolve's Primary panel, Baselight's Base Grade and the FilmLight Truelight Color Space all expose black point as a fundamental control alongside white point and gamma. ## Broadcast safe URL: https://postproduction.studio/en/glossary/broadcast-safe Domain: Delivery Conformity to broadcast technical limits (typically Rec.709, 100% saturation max, -1 dBTP audio peak, -23 LUFS) so the master plays without legal/technical violations on TV networks. ## Bus routing URL: https://postproduction.studio/en/glossary/bus-routing Domain: Sound Sending multiple audio tracks into a single sub-mix (bus) for collective processing (EQ, compression, reverb). Foundational to organized mixing in Pro Tools, Logic, Reaper, etc. ## CDL (Color Decision List) URL: https://postproduction.studio/en/glossary/cdl-color-decision-list Domain: Color Grading, Workflow The ASC CDL (American Society of Cinematographers Color Decision List) is a vendor-neutral color metadata format that captures basic primary color corrections in a portable, interchange-friendly way. It defines three parameters per channel: Slope (the multiplier applied to signal values, equivalent to gain), Offset (a constant added or subtracted from signal values, equivalent to lift) and Power (a gamma-style exponent applied after Slope and Offset). Together, these nine values per shot — three per channel for R, G, B — describe a complete primary correction that any compliant tool can apply identically, ensuring that color decisions made by a DIT on set match what an editor sees in dailies and what the colorist starts from in the grading suite. CDL is intentionally simple — it cannot describe secondaries, qualifiers, masks or LUTs — but its simplicity is its strength: every major NLE, color tool, dailies system and DI app supports CDL natively. The format is typically carried as XML metadata embedded in image files (in DPX or OpenEXR headers), as sidecar .cdl or .ccc files, or referenced in EDLs. ACES workflows pair CDL with a fixed working space (ACEScct) so that the same CDL values produce identical results across vendors. Reference: ASC CDL specification, freely available from theasc.com, with reference implementation code from the American Society of Cinematographers. ## CGI (Computer Generated Imagery) URL: https://postproduction.studio/en/glossary/cgi-computer-generated-imagery Domain: VFX CGI (Computer-Generated Imagery) is the broad term for any visual content created entirely or substantially within a computer rather than captured by camera — distinct from VFX which broadly covers all visual enhancement work (including non-CG operations like rotoscoping and compositing live elements). CGI workflows include: modeling (creating 3D geometry in Maya, Blender, Houdini, ZBrush), texturing (painting surface details in Substance Painter, Mari), rigging (setting up skeletal systems for animation), animation (keyframed or motion-captured movement), lighting (matching the live plate's illumination using HDR reference probes and matched light positions), simulation (cloth, fluids, particles, destruction, dynamics), and rendering (computing the final pixels with ray tracing in Arnold, RenderMan, Redshift, Karma, Cycles, or rasterization in real-time engines). Photorealistic CG requires meticulous attention to physical accuracy: subsurface scattering on skin and translucent materials, dispersion and chromatic aberration in lenses, motion blur matching the camera's shutter angle, depth-of-field matching the lens aperture, and grain matching the sensor. Feature film CG sequences (a CGI creature, an entire environment) can require months of work per shot and budgets in the hundreds of thousands. The industry's flagship demonstrations: ILM, Weta FX, MPC, Framestore, DNEG. The line between 'CGI' and 'live action with VFX' has blurred substantially since the 2010s. Reference: Birn's 'Digital Lighting & Rendering' remains a foundational text. ## Checksum URL: https://postproduction.studio/en/glossary/checksum Domain: Workflow, Image A hash value (MD5, xxHash, SHA-1) computed over a file to verify bit-perfect copies. DIT workflows always verify checksums after copying to confirm no data corruption. ## Chroma Key URL: https://postproduction.studio/en/glossary/chroma-key Domain: VFX, Image Chroma key is a compositing technique that isolates a foreground subject from a uniformly-colored background — almost always green or blue — by treating that color as transparent. The principle is straightforward: when a pixel's color matches the key color within tolerance, that pixel becomes transparent; everything else passes through. The complexity lies in handling edges, fine detail (hair, fur, motion blur, transparent objects, fast movement), color spill (the background color reflected onto the subject), uneven lighting on the screen, and the perfect choice of key color (green is preferred for most skin tones because skin has very little green; blue is used when subjects wear green wardrobe). Production setup matters enormously: the green screen must be evenly lit (within about 1/3 stop variation), the subject lit separately from the screen, distance between subject and screen large enough to avoid spill, and the camera shooting in a format with good chroma resolution (4:2:2 or 4:4:4, never 4:2:0 which softens chroma edges and makes keying harder). Modern keyers — Foundry IBK Keyer and Primatte in Nuke, Keylight in After Effects, Resolve's 3D Keyer — go beyond simple chroma threshold to use HSL or YUV cylinders and despill engines. Difficult elements are matched with rotoscoping or AI-driven mattes (Foundry CopyCat, Runway). Reference: VES Handbook chapter on keying and Foundry Nuke keying documentation. ## Chroma Subsampling URL: https://postproduction.studio/en/glossary/chroma-subsampling Domain: Formats, Color Science Chroma subsampling is a bandwidth-saving technique that reduces the resolution of color (chroma) information while keeping the brightness (luma) at full resolution, exploiting the human visual system's lower sensitivity to color detail than to luminance detail. The convention is written as J:a:b, where J is the number of luma samples per row in a reference block (always 4), a is the number of chroma samples in the top row, and b is the number of chroma samples in the bottom row. Common subsampling ratios are 4:4:4 (no subsampling, full color resolution, used in VFX and high-end finishing), 4:2:2 (half-horizontal chroma resolution, used in broadcast cameras, ProRes 422, DNxHR HQ and most mastering pipelines), and 4:2:0 (half-resolution chroma in both axes, used in H.264, H.265, AV1 distribution codecs and in consumer cameras). Subsampling matters for compositing and keying: 4:2:0 footage may chroma-key poorly due to soft color edges, and chroma-subsampled material can show color bleed on saturated edges (red text on green background, for example). Mastering and grading should always be done at 4:2:2 or 4:4:4 to preserve grading flexibility, with subsampling applied only at the final delivery encode. Reference: ITU-R BT.601 (where 4:2:0 originated) and the Wikipedia article on chroma subsampling for the geometric sampling diagrams. ## Chrominance URL: https://postproduction.studio/en/glossary/chrominance Domain: Color Science, Image Chrominance is the color information of an image signal, separated from luminance (brightness). In YUV or YCbCr color spaces, chrominance is carried by the U/Cb and V/Cr channels — Cb is the blue-yellow color difference, Cr is the red-cyan color difference — while Y carries luminance. This separation predates digital video, originating with NTSC and PAL analog broadcasting where it allowed black-and-white televisions to display color broadcasts (using only Y) while color sets used the chroma information. Modern digital video retains the YCbCr split because it enables chroma subsampling: since the human eye is less sensitive to color detail than to brightness, chroma channels can be stored at lower resolution (4:2:2 or 4:2:0) without obvious quality loss, drastically reducing file sizes. In post-production, chrominance matters for several operations: chroma key (separating subjects from green/blue backgrounds based on chroma values), chroma noise reduction (suppressing color noise separately from luminance noise), and chroma blur or sharpening (operations applied only to color information). Vectorscopes plot chrominance signals as scope-style displays showing color saturation and hue distribution. RGB color spaces have no separate chrominance — color and brightness are entangled in the three channel values. Reference: ITU-R BT.601 originally defined the YCbCr transformation used in subsequent broadcast standards. ## Cine EI URL: https://postproduction.studio/en/glossary/cine-ei Domain: Image An exposure mode on Sony cinema cameras (Venice, FX9, FX6, BURANO) where Exposure Index can differ from base ISO. Recorded log is unchanged; the monitoring/baked-in look reflects the EI offset. ## Clipping URL: https://postproduction.studio/en/glossary/clipping Domain: Image, Sound Clipping occurs when image values are recorded or rendered beyond what the medium or signal range can represent, causing irreversible loss of detail at the extremes. In picture, clipping happens in highlights when bright values exceed maximum recordable signal (saturated white in 8-bit Rec.709 = 255,255,255), in shadows when dark values are crushed below minimum (pure black = 0,0,0), or in individual color channels (a red object overexposed clips red while green and blue still contain detail, producing a magenta-orange flat patch). Once clipped, no amount of grading can recover the original values — the highlight detail in a window blown out at acquisition cannot be reconstructed in post. Detection is done with the waveform monitor (clipped highlights pile up against the top of the trace, shadows against the bottom) and false-color modes (commonly red overlay for highlight clip, blue or purple for shadow clip). RAW formats provide more clipping headroom than baked formats because the sensor's signal latitude is preserved — an ARRI Alexa can record about 14 stops of dynamic range in RAW, with about 6 stops above middle gray. Color grading workflows aim to bring all detail-bearing values within the displayable range; HDR pipelines extend that range substantially. Reference: the ARRI white papers on Log C latitude and the SMPTE waveform standards. ## Cloud postproduction URL: https://postproduction.studio/en/glossary/cloud-postproduction Domain: Workflow Hosting media, projects and processing in cloud infrastructure (AWS, GCP, dedicated providers like BeBop, Bidstack, Sohonet) — enabling distributed teams, scalable rendering, and zero on-premise hardware. ## Codec URL: https://postproduction.studio/en/glossary/codec Domain: Formats, Workflow A codec (compressor-decompressor) is a hardware device or software algorithm that encodes and decodes a digital audio or video stream. Modern post-production workflows depend on codec choices at every stage: capture, dailies, editorial proxies, finishing, and final delivery. Codecs fall into two families: intra-frame (each frame compressed independently, like ProRes, DNxHR, Cineform) which favor editing performance and quality preservation, and inter-frame (compression across frames using motion prediction, like H.264, H.265/HEVC, AV1) which achieve much smaller files at the cost of CPU-heavy decode and editing latency. The choice of codec dictates color depth (8, 10, 12 bits), chroma subsampling (4:2:0, 4:2:2, 4:4:4), bitrate, and whether the file is mezzanine-grade (suited for grading and VFX) or distribution-grade (compressed for streaming or broadcast). A typical feature film pipeline uses log-encoded RAW or ProRes 4444 XQ at acquisition, ProRes 422 LT proxies for offline editorial, and H.265 with PQ transfer for HDR streaming delivery. Selecting the wrong codec at any stage causes irreversible quality loss (8-bit chroma rounding), unmanageable file sizes, or playback failures on delivery platforms. SMPTE, ITU-T and ISO/IEC standardize the most widely used codecs (H.264 is ITU-T H.264 / ISO/IEC 14496-10 AVC). Understanding codec characteristics is foundational to every post-production decision. ## Cold storage URL: https://postproduction.studio/en/glossary/cold-storage Domain: Workflow, Delivery Long-term offline archive — typically LTO tapes stored on shelves or in climate-controlled vaults, or cloud archive tiers (Glacier, Deep Archive). Slow retrieval, lowest cost per TB. ## Color Cast URL: https://postproduction.studio/en/glossary/color-cast Domain: Color Grading, Image A color cast is an unintended, often unwanted color shift affecting an entire image or substantial portion of it, where what should appear neutral (gray, white) instead carries a tint toward red, green, blue, magenta or another hue. Color casts arise from various sources: incorrect white balance during capture (the most common cause), mixed lighting on set (interior tungsten plus daylight from a window), reciprocity failure in long-exposure stills, faulty filtration, color spill from nearby objects, or codec quantization in 8-bit chroma. Color casts can be intentional too — a colorist may deliberately introduce a warm cast for golden-hour memory or a cool cast for sci-fi atmosphere — but the term usually denotes a problem to be fixed. Detection methods include: examining a known-neutral reference in the frame (gray card, white shirt, asphalt), using the parade waveform to check if R, G and B traces match in shadows and mid-grays, or using the vectorscope to check if neutral regions cluster at the origin. Correction is done with the white balance picker (sample a known-neutral point), with primary color wheels (shifting lift/gamma/gain in the opposite direction of the cast), or with HSL qualifier (isolate the cast color and shift only it). Persistent casts after grading often indicate a deeper issue — a faulty in-camera LUT, mistaken IDT in ACES, or incorrect color space tag on the source file. ## Color Correction URL: https://postproduction.studio/en/glossary/color-correction Domain: Color Grading Color correction is the technical first pass of post-production color work, focused on fixing problems rather than creating a look. The colorist (or editor in a smaller workflow) ensures every shot is properly exposed, white-balanced, free of unintended color casts, and matched to surrounding shots so the editor's cut feels visually consistent. Typical operations include adjusting lift/gamma/gain (or shadows/midtones/highlights) to correct exposure, adjusting RGB balance to neutralize white-balance drift between cameras, and using waveform monitors and vectorscopes to verify legal video levels (0–100 IRE on a Rec.709 waveform, no clipping at 1023 on a 10-bit signal). Correction is non-destructive: original files are not modified, instead a CDL (ASC Color Decision List) or a node-tree records adjustments that the renderer applies on export. In a high-end pipeline, correction often happens at multiple stages: a DIT applies a base correction on-set for dailies, an assistant editor verifies during conform, and the colorist performs the final pass before grading. Correction differs from grading in intent (fix vs. create) but uses the same tools and is usually the first set of operations in a grading session. Mastering it is the technical foundation that makes creative grading possible. Reference: ASC CDL specification, available from theasc.com. ## Color Grading URL: https://postproduction.studio/en/glossary/color-grading Domain: Color Grading Color grading is the creative process of shaping the visual tone, mood and atmosphere of a film, series or commercial by manipulating color, contrast, saturation and lightness. It happens after technical color correction has normalized the footage, and is the primary craft of the colorist. Modern grading uses node-based color tools (DaVinci Resolve, Baselight, Lustre) where each operation — primaries, qualifiers, power windows, tracking, secondaries — is a discrete adjustable step. A typical session structures around three layers: an overall base grade that establishes contrast and color temperature; secondary grading that isolates regions (skin tones, skies, eyes) and adjusts them locally with power windows or HSL qualifiers; and finishing operations like film emulation, grain, glow, vignette. Workflow constraints matter: matching shots across a scene, maintaining continuity with the DoP's intent, hitting broadcast or theatrical legal-range requirements (Rec.709 100% peak, P3 D65 for theatrical, Rec.2020 PQ 1000 nits for HDR streaming), and generating multiple deliverables (SDR trim, HDR master, Dolby Vision) from the same grade. Grading is also where ACES-based workflows pay off — a single working space lets the colorist deliver Rec.709, P3, HDR10 and Dolby Vision masters from one grade tree. The American Society of Cinematographers' ASC CDL standard formalizes basic primary grading parameters portable between tools. ## Color Management URL: https://postproduction.studio/en/glossary/color-management Domain: Color Science, Workflow Color management is the discipline of maintaining accurate, predictable color representation across every step of the post-production pipeline — from camera capture through editorial, VFX, grading, mastering and final delivery to multiple display targets. Without active color management, footage from different cameras looks different, VFX plates don't match the live-action, the on-set monitor disagrees with the editorial system, the grade looks wrong in the projection room, and the streaming master doesn't match the broadcast version. Two dominant frameworks dominate: ACES (Academy Color Encoding System, an industry-mandated reference for feature and premium TV) and OpenColorIO (the open-source toolkit used widely in VFX and animation). Both define the entire transformation graph: camera input → working space → output display, with each conversion mathematically specified and reversible. A managed pipeline typically uses ACES2065-1 as the archival/exchange space, ACEScg for VFX rendering, ACEScct for grading and target-specific ODTs (Output Device Transforms) for Rec.709, P3-D65 HDR, Rec.2020 PQ, Dolby Vision, etc. Display calibration is integral: reference monitors are calibrated to known luminance, white point and gamma using probes (X-Rite i1Display, Klein K10A, JETI Specbos). Color management also addresses metadata propagation (LUT box settings, IDT assignments, CDL values) that must travel intact between vendors. Reference: Academy ACES documentation at acescentral.com and OpenColorIO documentation at opencolorio.org. ## Color Space URL: https://postproduction.studio/en/glossary/color-space Domain: Color Science, Image A color space is a mathematical model that defines a specific gamut of colors using three components — typically primaries (red, green, blue), a white point, and a transfer function relating signal values to luminance. In post-production, color spaces are the contract between cameras, working environments, and delivery formats. Camera color spaces describe what the sensor captured (ARRI Wide Gamut, Sony S-Gamut3.Cine, RED WideGamutRGB). Working color spaces are where grading and VFX happen (ACES2065-1 for archival, ACEScg for VFX rendering, ACEScct for grading, DaVinci Wide Gamut). Display and delivery color spaces describe what the audience sees (Rec.709 for SDR broadcast, P3-D65 for theatrical, Rec.2020 for HDR, sRGB for web). Each space differs in three dimensions: gamut size (Rec.2020 > P3 > Rec.709 > sRGB), white point (D65 vs D60 vs DCI white), and gamma/transfer function. Converting between color spaces requires a matrix transform (for primaries) and a curve transform (for gamma); skipping either step is the most common cause of incorrect color on delivery. Modern pipelines use OpenColorIO or ACES configs to make these conversions explicit and reversible. Tools like the CIE 1931 chromaticity diagram visualize gamut differences. Reference: ITU-R BT.2020, SMPTE RP 431-2 (DCI-P3), IEC 61966-2-1 (sRGB), and the Academy ACES documentation. ## Color Temperature URL: https://postproduction.studio/en/glossary/color-temperature Domain: Color Grading, Image Color temperature is the chromaticity of a light source, measured in Kelvin (K), describing where on the black-body radiator curve the light's color matches. It corresponds to the temperature in Kelvin at which an ideal black-body radiator emits light of that color. Tungsten filament bulbs (~3200K) emit a warm orange; daylight (~5600K) is whiter; overcast sky (~6500K) is cooler and slightly blue; shade can exceed 10000K with strong blue cast. In post-production, color temperature is the primary axis of white balance correction. Cameras record an assumed white point — either neutral 5600K, neutral 3200K, or via a custom white balance set with a gray card on set. If the assumed white doesn't match the actual scene illumination, footage looks orange (under-balanced) or blue (over-balanced), and color correction must shift the white point to neutral. Modern cinema cameras record raw, with white balance applied non-destructively in post via metadata; this is one of the strongest arguments for raw acquisition over baked-in formats. Mixed lighting (tungsten and daylight in the same frame) cannot be fully corrected with a single white balance and requires secondary grading or compositing. Display reference white points are also color temperatures: D65 (6504K) for sRGB, Rec.709 and most HDR; DCI white (around 6300K with a slight green tint) for theatrical projection. Reference: CIE 015 colorimetry standard and ITU-R BT.709-6 white point specification. ## Compositing URL: https://postproduction.studio/en/glossary/compositing Domain: VFX Compositing is the digital combination of multiple visual elements — live-action plates, CGI, matte paintings, particles, atmospheric effects — into a single seamless frame. It is the final visual assembly step of VFX work and the bridge between rendered or shot elements and the finished image the audience sees. Modern compositing is performed in node-based applications: Foundry Nuke (the industry standard for feature VFX and high-end episodic), Blackmagic Fusion (bundled with DaVinci Resolve), After Effects (motion graphics and lower-end VFX). Each operation — color correction, edge blur, transform, merge, defocus — is a discrete node in a tree, allowing non-destructive iteration and review. Compositing typically works in scene-linear color space using 32-bit float EXR files to preserve highlights and accurate light-additive math; values can exceed 1.0 to represent extreme luminance. The compositor handles roto (animated cutouts), keying (chroma key, luma key, despill), tracking (2D and 3D camera solving), grain matching, lens distortion matching, atmospheric integration and final color balance — every detail that sells the illusion that the elements were captured together. Pipeline-wise, compositing happens late in the VFX chain (after 3D rendering and matte painting) and feeds the master back to the editorial conform and final grade. Major studios standardize on USD (Universal Scene Description) and OpenColorIO to keep compositing consistent across vendors. Reference: VES Handbook of Visual Effects and the Foundry Nuke documentation. ## Conform URL: https://postproduction.studio/en/glossary/conform Domain: Workflow, Editing The process of relinking offline edit decisions (XML/AAF/EDL) to original camera files and recreating the timeline in the online/grading suite. ## Conformation (Conform) URL: https://postproduction.studio/en/glossary/conformation-conform Domain: Workflow, Editing Conform (or conformation) is the post-production step that reassembles an editorial cut using the original high-resolution master files, replacing the lower-quality proxy or offline media that the editor worked with. The editor cuts the picture on proxies in Avid Media Composer or Adobe Premiere; once picture lock is reached, an XML, AAF, or EDL describing every cut, transition, dissolve, speed change and effect is exported. The conform artist then takes this list into a finishing application (DaVinci Resolve, Baselight, Autodesk Flame, Filmlight Daylight) and the system automatically relinks each clip to its original camera file at full resolution, applies the cuts and effects, and rebuilds the timeline. Conform is the bridge between editorial and finishing: it must preserve frame-accuracy (one frame off destroys sync), match every speed ramp and freeze, handle nested sequences and multicam edits, and verify that no clip was lost or mis-linked. Common issues include missing or mis-named source files, dropped audio channels, timecode breaks, codec mismatches between offline and online versions and unintended duplicate frames. After conform, the colorist begins grading, the VFX shots are inserted from finals, titles are added and the master moves to mastering. Modern Avid workflow uses AAF for conform; DaVinci Resolve workflow typically uses XML or DRP project handoff. Reference: SMPTE ST 2067 (IMF, which is also a kind of conform target) and Avid Media Composer conform documentation. ## Container Format URL: https://postproduction.studio/en/glossary/container-format Domain: Formats, Delivery A container format (sometimes called a wrapper) is a file structure that holds one or more streams of media — video, audio, subtitles, metadata, chapter markers, timecode — bundled together, independent of the codecs used to compress each stream. Common containers include MP4 (.mp4, ISO/IEC 14496-14 MPEG-4 Part 14, the dominant streaming and consumer container), MOV (.mov, Apple's QuickTime container, used widely in post-production for ProRes, DNxHR and RAW codecs), MXF (.mxf, SMPTE ST 377-1 Material Exchange Format, used in broadcast, IMF, and pro film/TV pipelines), MKV (.mkv, Matroska, open-source flexible container), AVI (.avi, legacy Windows container, mostly deprecated). The container decides what codecs can be carried (MP4 traditionally limited to MPEG-4 family, MXF to specific SMPTE-approved codecs), how seeking and indexing work, what metadata fields are supported (timecode, color space tags, HDR metadata, captions/subtitles), and how multiple audio tracks and languages are stored. A common confusion: 'ProRes file' usually means a ProRes-encoded video wrapped in a MOV container — but ProRes can also be carried in MXF, an option used in IMF and broadcast workflows. Choosing the wrong container can break a workflow even when the codec is correct (e.g., delivering H.264 in MKV to a platform that requires MP4). Reference: ISO/IEC 14496-14 (MP4), SMPTE ST 377-1 (MXF), and the Matroska specification. ## CST (Color Space Transform) URL: https://postproduction.studio/en/glossary/cst-color-space-transform Domain: Color Science, Color Grading The Color Space Transform plugin in Resolve (DCTL) that converts between input and output color spaces and gammas. The foundation of Resolve Color Management and color science workflows. ## Dailies URL: https://postproduction.studio/en/glossary/dailies Domain: Workflow, Editing Dailies (also called rushes) are the lightly-processed daily output from the camera, prepared overnight (or close to it) and delivered to director, cinematographer, editor and production for review the day after a shoot. Historically printed from negative for screening, modern dailies are digital files generated from camera RAW or mezzanine masters with a basic creative LUT applied, color-balanced shot-to-shot, sometimes with audio sync and slate metadata embedded. Dailies serve multiple stakeholders simultaneously: the director and DoP review performance and image quality; the editor begins assembling a rough cut; the production accountant reconciles footage with the shooting schedule; the script supervisor verifies coverage. The DIT (Digital Imaging Technician) on set typically prepares the on-set look LUT during shooting and hands off camera files and CDL to the dailies operator (often working at a post house). Tools include Colorfront On-Set Dailies, Pomfort Silverstack, MTI Cortex, Codex Production Suite and Assimilate Live Looks. Modern dailies are usually distributed via secure web platforms like Frame.io, Aspera Faspex, Moxion or PIX System, often with watermarked H.264 or ProRes 422 Proxy versions. Quality matters because dailies establish the visual baseline for the rest of post — a flawed dailies workflow propagates color errors all the way to the final grade. Reference: ACES production setup documentation and Frame.io dailies workflow guides. ## DaVinci Wide Gamut (DWG) URL: https://postproduction.studio/en/glossary/davinci-wide-gamut Domain: Color Science A wide-gamut working color space designed by Blackmagic, larger than Rec.2020 and ACES AP1. Used with DaVinci Intermediate gamma. Default working space in modern Resolve. ## DCI-P3 URL: https://postproduction.studio/en/glossary/dci-p3 Domain: Color Science, Delivery DCI-P3 is the color space defined by Digital Cinema Initiatives (DCI) for theatrical projection and the standard reproduction target in digital cinema. Its primaries form a triangle wider than Rec.709 — covering about 45% of the CIE 1931 chromaticity diagram versus Rec.709's 35% — particularly extending in the red and green regions. The original DCI-P3 specification uses a 'DCI white point' (correlated color temperature around 6300K with a slight green tint), reflecting the spectral characteristics of xenon projection lamps. A variant called P3-D65 uses the standard D65 white point (6504K) and has become the dominant choice for HDR streaming, home theater, and consumer wide-gamut displays (most Apple devices since 2016, premium QLED and OLED TVs). P3-D65 is the practical target gamut for HDR mastering: while content is encoded in Rec.2020 containers (for future-proofing), reference monitors typically cover 95–100% of P3-D65 and only 70–90% of Rec.2020, so colorists work in 'P3 limited Rec.2020' to ensure the master fits within what consumer displays can show. Theatrical DCPs are mastered in DCI-P3 (with DCI white) with XYZ encoding. Apple's Wide Color, used in iPhone Camera and Final Cut Pro Display P3 deliveries, is also P3-D65. Reference: SMPTE RP 431-2 (DCI-P3 specification) and SMPTE EG 432-1 (digital cinema reference projector). ## DCP URL: https://postproduction.studio/en/glossary/dcp Domain: Formats, Delivery A DCP (Digital Cinema Package) is the standardized file delivery format for theatrical projection in commercial cinemas worldwide. Defined by DCI (Digital Cinema Initiatives, the joint venture of major studios) and standardized by SMPTE, a DCP is a folder containing JPEG 2000-encoded picture frames (one per frame, lossless DCI compliance), uncompressed multi-channel PCM audio (5.1 or 7.1 typically, 24-bit 48 kHz), XML metadata files (CPL — Composition Playlist, PKL — Packing List, ASSETMAP) and an optional KDM (Key Delivery Message) for encryption. Picture is encoded in XYZ color space (a CIE-derived color space wider than P3, but containers are P3-D65 limited in practice) with 12-bit per channel precision, at frame rates of 24, 25, 30, 48, 50, 60 fps in 2K (2048×1080) or 4K (4096×2160). Two variants exist: Interop DCP (older but still accepted by many cinemas) and SMPTE DCP (the current standard, ST 429 series). DCPs are validated by tools like Easy DCP, DCP-o-matic, or commercial validators before being shipped to distributors. Audio normalization follows the Dolby reference level (–20 dBFS = 85 dB SPL in calibrated rooms). Encrypted DCPs require a KDM keyed to each cinema's projector certificate and a time window. Reference: ISDCF (isdcf.com) maintains test materials and best-practice documents; SMPTE ST 429 and ST 430 define the standard. ## De-esser URL: https://postproduction.studio/en/glossary/de-esser Domain: Sound A frequency-selective compressor that tames sibilance (s, sh, t consonants) in vocal recordings. Operates around 5–10 kHz. Essential for dialogue and music vocals. ## Deinterlacing URL: https://postproduction.studio/en/glossary/deinterlacing Domain: Image, Formats Deinterlacing is the process of converting interlaced video — where each frame is composed of two alternating fields capturing different moments in time — into progressive video where each frame is captured at a single instant. Legacy broadcast video used interlacing (NTSC's 60i, PAL's 50i) to achieve effective higher temporal resolution at limited bandwidths, but modern displays (LCD, OLED, projectors) and most modern delivery (streaming, 4K broadcast) require progressive frames. Deinterlacing must therefore happen somewhere — at acquisition (capturing in 24p or 30p natively, the ideal case), in post-production (converting older archive 60i to 60p or 30p), or at playback (in display electronics or streaming player). Algorithms range from simple to complex: bob (display each field as a full frame, doubling temporal rate and halving vertical resolution), weave (combine two fields into one frame, causing combing on motion), spatial deinterlacing (interpolate missing lines within each field), motion-adaptive deinterlacing (detect motion and apply different strategies to moving versus static regions), and motion-compensated deinterlacing (use optical flow to construct progressive frames that don't exist in the original). DaVinci Resolve's deinterlacer, Avid AAFTrans, and dedicated tools like Yadif Mod and QTGMC produce high-quality results. Archival deinterlacing of 1990s-2000s TV programs for modern streaming delivery is significant ongoing work. Reference: SMPTE RP 2069 covers deinterlacing recommended practices. ## Deliverables URL: https://postproduction.studio/en/glossary/deliverables Domain: Delivery, Workflow The set of files required by a broadcaster, distributor or platform at end of post (master, HDR/SDR versions, audio stems, subtitles, captions, metadata sheets, technical QC sheets). ## Dialogue Editing URL: https://postproduction.studio/en/glossary/dialogue-editing Domain: Sound Dialogue editing is the technical and creative process of preparing recorded dialogue for the mix, organizing all production sound and ADR into a clean, intelligible track ready for mixing. The dialogue editor's tasks include: cleaning recordings (removing clicks, pops, plosives, microphone bumps, breath noise where appropriate), smoothing edits (cuts between angles in the same scene should not change the room tone perceptibly), spotting and processing ADR (deciding which lines need replacement, integrating ADR with production audio), de-noising (using tools like iZotope RX to suppress background noise while preserving voice quality), removing wild dialogue (room tone-only recordings between takes), and conforming dialogue to picture (a cut from medium to close-up should not cause noticeable audio shift). The dialogue editor works primarily in Pro Tools, with iZotope RX as the essential cleanup tool, and specialized tools like Synchro Arts Revoice Pro for matching ADR to production. The output is a 'dialogue stem' — typically multiple tracks of dialogue (production, ADR, group ADR, walla) organized for the dialogue mixer to balance and process. Dialogue editing is one of the most invisible crafts of sound post: viewers do not notice excellent dialogue editing, but immediately notice when it is bad (popping consonants, room tone changes, hum buzz). Modern dialogue editors handle thousands of edits per feature. Reference: Purcell, 'Dialogue Editing for Motion Pictures.' ## Dialogue isolation URL: https://postproduction.studio/en/glossary/dialogue-isolation Domain: Sound Separating dialogue from background sound using AI (RX Voice De-Noise, Resolve Voice Isolation) or manual processing. Critical for cleaning location audio and salvaging unusable production sound. ## Display-referred URL: https://postproduction.studio/en/glossary/display-referred Domain: Color Science A color workflow where values map directly to a target display range (e.g. Rec.709, HDR10). Linear conversions are tied to the destination display. ## DIT (Digital Imaging Technician) URL: https://postproduction.studio/en/glossary/dit-digital-imaging-technician Domain: Workflow, Image The DIT (Digital Imaging Technician) is the on-set crew member responsible for managing the integrity of the digital image pipeline from camera to dailies, including media management, image quality assurance, color reference setup, and downstream technical workflow. The DIT works closely with the cinematographer and operates between camera department and post-production. Responsibilities include: ingesting camera media (verifying checksums to detect corruption), backing up media to redundant storage (typically two copies on different physical drives), generating viewing copies and proxies for video village, applying on-set color references (CDLs, viewing LUTs) so the cinematographer sees an image close to the intended final grade, ensuring proper recording formats and settings (the DIT verifies camera codec, color space, ISO and resolution are correct for the production), and managing the relationship between camera RAW and downstream tools. On larger productions the DIT may also manage Wireless Compact Units (WCUs) that send video signals to multiple monitors, color charts (X-Rite ColorChecker, DSC Labs), and recording onto live archiving systems. Tools: Pomfort Silverstack and Livegrade Pro are the dominant DIT suite, Codex Vault for ARRI workflows, ASsimilate Live FX for live grading workflows. The DIT often hands the production over to the post-production pipeline by delivering checksum-verified media to an offline editor and a colorist. Reference: ASC Magazine articles on DIT workflow. ## DIT cart URL: https://postproduction.studio/en/glossary/dit-cart Domain: Workflow, Image A mobile workstation used on set by the Digital Imaging Technician for backup, transcoding, syncing, and quality-checking camera media. Typically a rugged tower or laptop with RAID storage and card readers. ## DNxHD / DNxHR URL: https://postproduction.studio/en/glossary/dnxhd-dnxhr Domain: Formats Avid DNxHD (HD) and DNxHR (resolution-independent successor) are intra-frame mastering codecs developed by Avid Technology, functionally equivalent to Apple ProRes and used heavily in Avid Media Composer-centric post-production pipelines. DNxHR variants include DNxHR LB (low bandwidth proxy), DNxHR SQ (standard quality), DNxHR HQ (high quality, equivalent to ProRes 422 HQ), DNxHR HQX (10-bit high quality), and DNxHR 444 (12-bit 4:4:4, equivalent to ProRes 4444). DNxHR resolves the original DNxHD limitation of being tied to specific HD resolutions: DNxHR scales to any resolution, frame rate and bit depth combination. Like ProRes, the codec is intra-frame and optimized for editorial performance (fast scrubbing, no decoding chain). It is widely used in broadcast and feature post pipelines where Avid Media Composer is the editorial NLE. DNxHR is open-sourced (SMPTE ST 2019 family, also known as VC-3) which makes it broadly supported in non-Avid tools — DaVinci Resolve, Premiere Pro, Nuke and FFmpeg all read and write DNxHR. Bitrates at 4K UHD 30p range from about 87 Mbps for LB to 1.9 Gbps for 444. The choice between ProRes and DNxHR usually comes down to pipeline tooling: ProRes is dominant in Final Cut and Resolve shops, DNxHR in Avid-based broadcast and feature post. Reference: SMPTE ST 2019. ## Dolby Atmos URL: https://postproduction.studio/en/glossary/dolby-atmos Domain: Sound, Delivery Dolby Atmos is an object-based audio format developed by Dolby Laboratories that breaks from traditional channel-based mixing (5.1, 7.1) by treating sounds as independent objects positioned in three-dimensional space with associated metadata. Where a 5.1 mix sends discrete tracks to fixed left, right, center, surround left, surround right and LFE channels, an Atmos mix carries up to 128 objects each with x/y/z position metadata, plus a 7.1.2 (or 9.1.6) bed of channel-based audio. Cinema Atmos installations use up to 64 individually-addressable speakers including overhead arrays, while home Atmos plays back on soundbars, AVRs and Dolby Vision-capable TVs by rendering objects to whatever speakers are present (5.1.2, 7.1.4, etc.). The mixing stage is typically Pro Tools with the Dolby Atmos Renderer plugin or a Dolby DAR (Atmos Mastering Suite). Deliverables include the ADM BWF master file (Audio Definition Model Broadcast Wave Format) containing all objects and metadata; this is then encoded for distribution into Dolby Digital Plus with Joint Object Coding (EAC-JOC) for streaming, MAT for Blu-ray, or DCI-compliant streams for cinema. Netflix, Apple Music, Tidal and Amazon Music all distribute Atmos content. The format is mandatory for flagship streaming originals and has become the de facto standard for premium music releases. Reference: Dolby Atmos Specifications and EBU Tech 3388 ADM standard. ## Dolby Vision URL: https://postproduction.studio/en/glossary/dolby-vision Domain: Color Grading, Formats Dolby Vision is a proprietary HDR format developed by Dolby Laboratories that combines a high-luminance PQ transfer function (up to 10,000 nits, though displays cap lower), 12-bit color depth, and dynamic metadata that adjusts tone mapping on a per-scene or per-frame basis. It is the premium HDR standard mandated by Netflix, Apple TV+, Disney+ and other tier-1 streamers for flagship original productions. Dolby Vision distinguishes itself from HDR10 (static metadata only) by carrying L1 metadata (scene-by-scene min/max/avg luminance), and optionally L2 (creative trim adjustments), L8 (target-display-specific trims). This dynamic metadata enables a Dolby Vision-capable display to tone-map content optimally for its specific peak luminance, rather than applying a one-size-fits-all mapping. Mastering Dolby Vision requires a colorist working on a reference monitor at 1000, 2000, or 4000 nits and creating trim passes for lower-peak displays (typically 600 and 100 nits SDR). The output IMF or MXF carries the dual-layer (base-layer HDR10 + enhancement-layer metadata) or single-layer (Profile 8) bitstream. Dolby's content delivery specification (Dolby Vision Profile 8.1 most common for streaming, Profile 5 for IMF, Profile 7 for Blu-ray) is strictly documented; conformance testing through Dolby's certification ensures broadcast and streaming compatibility. Reference: Dolby Vision Streaming Bitstream Specification and SMPTE ST 2094-10. ## Drop Frame Timecode URL: https://postproduction.studio/en/glossary/drop-frame-timecode Domain: Workflow, Editing Drop-frame timecode (DF) is a counting convention that solves a specific arithmetic problem in NTSC video: the actual frame rate is 29.97 fps (or 23.976 in film-pulldown contexts), not exactly 30. If a timecode counter ticked at exactly 30 frames per second of timecode but only 29.97 frames of video passed in a real second, the timecode would drift ahead of wall-clock time by about 3.6 seconds per hour — disastrous for broadcast where program lengths must be exact. Drop-frame fixes this by skipping two frame numbers at the beginning of every minute (e.g., 00:01:00:00 jumps to 00:01:00:02) except every tenth minute (00:10:00:00, 00:20:00:00, etc.). Over the course of an hour this drops 108 frame numbers total, exactly compensating for the 0.03 fps deficit. Importantly, no actual frames are dropped — only the labels are skipped; the video plays continuously. Drop-frame timecode is signaled by semicolons in the display (HH:MM:SS;FF) instead of colons. It is the standard for NTSC broadcast deliverables in North America, Japan and certain other regions; non-drop is standard for PAL (25 fps, no fractional rate), film (24 fps), and modern non-broadcast contexts. SMPTE ST 12 codifies the algorithm. ## Dual native ISO URL: https://postproduction.studio/en/glossary/dual-native-iso Domain: Image A camera with two physical native ISO circuits, switching between them depending on exposure. Sony FX9 (800/4000), Venice (500/2500), Panasonic S1H/Varicam. Each base offers full dynamic range. ## DWG Intermediate URL: https://postproduction.studio/en/glossary/dwg-intermediate Domain: Color Science The logarithmic transfer function paired with DaVinci Wide Gamut. Provides a perceptually uniform working space for grading log footage from any camera. ## Dynamic range (camera) URL: https://postproduction.studio/en/glossary/dynamic-range-camera Domain: Image, Color Science The ratio between the brightest and darkest tones a camera can capture without clipping, measured in stops. Modern cinema cameras: 13–17+ stops. Display targets: ~6 stops SDR, 20+ stops HDR. ## EDL URL: https://postproduction.studio/en/glossary/edl Domain: Workflow, Formats Edit Decision List — a flat text file (CMX 3600) listing every cut in a sequence with source/record timecodes. Legacy interchange format, still standard for color grading conforms. ## EI workflow URL: https://postproduction.studio/en/glossary/ei-workflow Domain: Image An exposure workflow where the operator monitors at one ISO (Exposure Index) but the camera records at its native sensitivity. Allows artistic flexibility while preserving full dynamic range in the file. ## EOTF (Electro-Optical Transfer Function) URL: https://postproduction.studio/en/glossary/eotf-electro-optical-transfer-function Domain: Color Science The EOTF (Electro-Optical Transfer Function) is the mathematical curve that converts an encoded signal value (electrical) into a displayed luminance value (optical) on a screen. Every display format defines its own EOTF: Rec.709 uses a gamma 2.4 EOTF (BT.1886) for reference monitors, PQ uses SMPTE ST 2084 as an absolute-luminance EOTF (signal-to-nits mapping defined to 10,000 cd/m²), and HLG uses a hybrid EOTF that combines log behavior in highlights with gamma behavior in shadows. The EOTF is the display side of a transfer function chain — the encoding side, applied at capture or in compositing, is the OETF (Opto-Electronic Transfer Function) which is mathematically related but not necessarily inverse to the EOTF. For Rec.709 the OETF (camera) and EOTF (display) are not strict inverses, an intentional asymmetry that compensates for the dim viewing environment of broadcast television (the so-called 'end-to-end' system response). For PQ, the EOTF is defined absolutely so that the same signal value always means the same luminance on any compliant display. EOTF mismatch is a common source of grading errors — a master encoded in PQ but viewed on a gamma-2.4 monitor will look wildly wrong. Modern color management tools (OpenColorIO, ACES) explicitly track which EOTF applies at each point. References: ITU-R BT.1886 (Rec.709 EOTF), SMPTE ST 2084 (PQ), ITU-R BT.2100 (HDR system). ## ETTR (Expose To The Right) URL: https://postproduction.studio/en/glossary/ettr Domain: Image An exposure strategy that maximizes shadow signal-to-noise ratio by exposing as bright as possible without clipping highlights. Standard on log workflows; useful for low-light scenes. ## EXR (OpenEXR) URL: https://postproduction.studio/en/glossary/exr-openexr Domain: Formats, VFX OpenEXR (.exr) is the high-dynamic-range image format developed by Industrial Light & Magic in 1999 and now maintained by the Academy Software Foundation as the de facto industry standard for VFX and CG image interchange. EXR's key features make it the natural choice for scene-linear compositing: 32-bit float per channel (preserving values above 1.0 for HDR scenes, where the sun might be 10000 units of brightness while skin is 0.2), arbitrary number of channels (RGBA plus depth, normals, motion vectors, object IDs, AOVs from any 3D renderer), multiple layers and parts in a single file, support for lossless and lossy compression (PIZ, ZIP, DWA/DWB for high-bit-depth lossless or near-lossless options), and rich metadata (camera info, color space tags, exposure, render parameters). EXR can carry pre-multiplied alpha for correct compositing math. Half-float (16-bit, 'half' precision) is the more compact alternative used widely when full 32-bit float is not needed. EXR is supported natively by Nuke, Maya, Houdini, Katana, RenderMan, V-Ray, Arnold, Cinema 4D, Blender, DaVinci Resolve, Photoshop and dozens of others. Multi-channel EXRs feeding compositors with all the AOVs from a single render are the modern 3D-to-comp standard. Reference: OpenEXR specification at openexr.com, maintained by the Academy Software Foundation. ## False color URL: https://postproduction.studio/en/glossary/false-color Domain: Image A monitoring mode that overlays color-coded exposure zones on the image (typically: blue=shadows, green=mids/skin, yellow/orange=highlights, red=clipping). Used to set precise exposure on set. ## Fast turnaround URL: https://postproduction.studio/en/glossary/fast-turnaround Domain: Workflow, Delivery A delivery timeline measured in hours to days rather than weeks — common in commercials, news, social content, and indie festival submissions. Requires streamlined pipelines and clear deliverables specs. ## Festival master URL: https://postproduction.studio/en/glossary/festival-master Domain: Delivery, Formats A delivery master meeting festival technical specs — DCP (2K/4K, JPEG2000), sometimes ProRes 422 HQ master. Includes captions/subtitles per festival rules and standardized loudness (-24 LUFS typical). ## Final Cut URL: https://postproduction.studio/en/glossary/final-cut Domain: Editing Final cut is the picture-locked, fully revised version of an edit, approved by all decision-makers, from which downstream finishing departments (color, VFX, sound, music) work to completed deliverables. The term carries a double meaning: it can describe the editorial state (the cut is final, no more picture changes) and the contractual privilege (an artist with 'final cut' contractually controls editorial decisions, a major point of director-studio negotiation). Once final cut is achieved, the editorial team produces the locked picture turnover: a frame-accurate reference, a frame counter overlay (often with feet+frames or timecode burned in for sound spotting), and accompanying paperwork — change list (every edit, every frame), cut list (footage by scene), audio EDL, VFX shot list with handles. From the final cut, color grading conforms the timeline against original media, sound design fills in temp tracks with final cue work, the composer scores to lock picture, VFX finalizes shots in the locked context. Any subsequent picture change after final cut triggers a 'change order' that must be documented and propagated to every department, an expensive event that productions strive to avoid. The Director's Guild of America formally codifies 'final cut' rights in some director contracts (most established directors negotiate it; first-time directors rarely have it). ## Foley URL: https://postproduction.studio/en/glossary/foley Domain: Sound Foley is the post-production technique of creating sound effects in performance — a foley artist watches the picture and acts out the physical sounds the characters or objects produce, recorded synchronously in a dedicated foley stage. Named after Jack Foley (sound effects pioneer at Universal in the 1930s-40s), the technique covers three sound categories: footsteps (different surfaces, different shoes, different walking styles for different characters), props (door handles, keys, fabric movement, drinking, eating, paper rustling), and cloth (clothing movement, sitting, shifting). Foley is essential because production sound recording focuses on dialogue clarity — the boom operator captures voices but typically not the smaller incidental sounds that bring scenes to life. Without foley, scenes feel sterile: an actor opening a door, taking a step, and sitting down with their original production sound alone often lacks the texture that makes the action believable. The foley stage is acoustically dry (to allow flexible processing in the mix), equipped with various floor surfaces (gravel, hardwood, concrete, leaves, carpet, tile), thousands of props for every conceivable sound, and condenser microphones positioned close to the artist's performance. Modern foley involves significant performance craft — a foley artist may spend hours getting one character's walk right across a sequence. Major foley stages: Skywalker Sound, Sound One in New York, Footsteps Post-Production. Reference: Yewdall and Sonnenschein cover foley extensively. ## Frame interpolation URL: https://postproduction.studio/en/glossary/frame-interpolation Domain: Image, VFX Generating intermediate frames between existing ones to increase frame rate or smooth slow motion. Modern AI tools (Resolve Speed Warp, Topaz Video AI, RIFE) outperform classic optical flow. ## Frame Rate URL: https://postproduction.studio/en/glossary/frame-rate Domain: Image, Formats Frame rate (often abbreviated fps) is the frequency at which consecutive still images are captured, encoded or displayed to produce the illusion of motion. The choice of frame rate carries technical, perceptual and creative weight that propagates through the entire post-production pipeline. The dominant cinema frame rate is 24 fps (precisely 23.976 fps in NTSC-derived workflows due to the historical 1000/1001 pulldown), giving the characteristic motion cadence audiences associate with film. Broadcast television uses 25 fps in PAL/SECAM regions (Europe, most of Asia) and 29.97 fps in NTSC regions (Americas, Japan). High-frame-rate cinema initiatives have pushed 48 fps (The Hobbit) and 60 fps (Gemini Man) experiences. Sports broadcasting and streaming increasingly use 50 fps and 59.94 fps for smoother motion. Variable frame rate (VFR) footage from smartphones is a common headache in editorial — it must be conformed to a constant frame rate before grading. Frame rate interacts with shutter angle: 180° at 24 fps gives 1/48s exposure (the natural film look); steeper or shallower angles change motion blur character. Conversions between frame rates require either dropping/duplicating frames (cheap but jerky) or optical-flow interpolation (Resolve's Speed Warp, Twixtor) for smooth retiming. Reference: ITU-R BT.709, SMPTE ST 12 (timecode) and the EBU R 118 broadcast frame rate recommendations. ## Fusion cache URL: https://postproduction.studio/en/glossary/fusion-cache Domain: VFX, Workflow A render cache specific to the Fusion compositing page in Resolve. Stores intermediate frames of node graphs to accelerate playback of complex VFX. ## Gamma URL: https://postproduction.studio/en/glossary/gamma Domain: Color Science, Image Gamma is the non-linear relationship between input signal values and output luminance in image encoding, originally derived from the response curve of cathode-ray tube displays and retained in modern digital workflows for perceptual efficiency. The human visual system perceives brightness logarithmically — small steps in dark areas are very visible while large steps in bright areas are barely noticed — so allocating more code values to shadows via a gamma curve produces images that look smooth at modest bit depths (8 or 10 bits). The Rec.709 broadcast standard specifies a camera-side OETF roughly equivalent to gamma 1/2.2 and a display-side EOTF of gamma 2.4 (formalized as BT.1886). DCI-P3 theatrical uses gamma 2.6 for the darker projection environment. sRGB uses a piecewise function approximating gamma 2.2 with a linear toe in shadows. Inside grading sessions, you choose a working space whose gamma matches the intent: log curves (ARRI Log C, Sony S-Log3, RED Log3G10) are gamma-like but stretch a much wider dynamic range; linear-light spaces (ACEScg, scene-linear EXR) have no gamma at all and are used for VFX compositing where mathematical operations like blur and additive compositing require linear data. Confusing gamma with the underlying transfer function or with the working space causes the most common color-pipeline bugs. Reference: ITU-R BT.1886 (display gamma) and the IEC 61966-2-1 sRGB specification. ## Gamut URL: https://postproduction.studio/en/glossary/gamut Domain: Color Science Gamut is the complete range of colors that a device, color space, or imaging system can capture, encode or reproduce, typically visualized as a triangle on a CIE 1931 xy chromaticity diagram. The vertices of the triangle are the three primary colors (red, green, blue) of the system; everything inside the triangle is reproducible, everything outside is not. Common gamuts in post-production include sRGB (the smallest, used for web), Rec.709 (HD broadcast, nearly identical to sRGB), DCI-P3 (theatrical projection, ~45% wider than Rec.709), P3-D65 (P3 primaries with D65 white point, used for HDR streaming), Rec.2020 (UHD/HDR standard, more than twice the area of Rec.709), and ACES AP0/AP1 (encompassing the entire visible spectrum, used as archival/working spaces). Wider gamuts allow more saturated colors but require higher bit depths to avoid banding when subdivided — Rec.2020 typically demands 10-bit or 12-bit encoding. Gamut mapping is needed when content authored in a wide gamut must be displayed on a narrow-gamut device: out-of-gamut colors must be desaturated or clipped using a tone-mapping algorithm. Tools like DaVinci Resolve's Color Space Transform, FilmLight Truelight, and OpenColorIO handle gamut conversions explicitly. Reference: ITU-R BT.2020 specifies the Rec.2020 gamut; SMPTE RP 431-2 defines DCI-P3; and the CIE 015 colorimetry standard provides the foundational reference. ## Gamut mapping URL: https://postproduction.studio/en/glossary/gamut-mapping Domain: Color Science, Color Grading Compressing or remapping out-of-gamut colors when converting between color spaces (e.g. Rec.2020 → Rec.709 or P3-D65 → Rec.709). Prevents clipping and hue shifts. ## Generative fill (video) URL: https://postproduction.studio/en/glossary/generative-fill-video Domain: VFX, Image AI tools that fill in missing image regions in motion — rig removal, object removal, set extension (Runway, Pika, Adobe Generative Fill in After Effects). Replacing manual rotoscoping/cleanup for many tasks. ## Guerrilla filmmaking URL: https://postproduction.studio/en/glossary/guerrilla-filmmaking Domain: Production Low-budget, fast, often unpermitted filmmaking approach prioritizing speed, small crews, available light, and improvisation. Common entry point for indie features and shorts. ## H.264 (AVC) URL: https://postproduction.studio/en/glossary/h-264-avc Domain: Formats, Delivery H.264, also known as MPEG-4 Part 10 or Advanced Video Coding (AVC), is the most widely deployed video codec in history, used in everything from Blu-ray discs and broadcast television to YouTube, social media, video conferencing, and security cameras. Developed jointly by ITU-T VCEG and ISO/IEC MPEG and finalized in 2003, H.264 introduced features that became industry standard: variable block-size motion compensation, multi-reference-frame prediction, integer transforms (replacing the DCT of MPEG-2), and CABAC entropy coding. It is an inter-frame codec — frames are grouped into GOPs (Groups of Pictures) where I-frames stand alone, P-frames predict from past frames, and B-frames predict bidirectionally — which produces excellent compression at modest bitrates but makes random-access editing slower than intra-frame codecs like ProRes. Profiles and levels define capability tiers: Baseline (low complexity, mobile), Main (broadcast), High (Blu-ray and most streaming), High 10 (10-bit), High 4:4:4 (chroma at full resolution). For 4K UHD streaming H.264 typically uses 25–40 Mbps; for 1080p 5–10 Mbps. Hardware decoders are ubiquitous, contributing to H.264's longevity. In post-production, H.264 is rarely used for capture or mastering (too lossy for grading) but dominates final delivery to most platforms. The successors H.265/HEVC and AV1 offer better compression but face slower adoption due to licensing or hardware constraints. Reference: ITU-T H.264 and ISO/IEC 14496-10. ## H.265 (HEVC) URL: https://postproduction.studio/en/glossary/h-265-hevc Domain: Formats, Delivery H.265, also known as HEVC (High Efficiency Video Coding) or MPEG-H Part 2, is the successor to H.264, designed to achieve roughly twice the compression efficiency at the same visual quality. Standardized in 2013 by ITU-T VCEG and ISO/IEC MPEG, HEVC introduced larger coding tree units (up to 64×64 pixels vs H.264's 16×16 macroblocks), more flexible partitioning, 35 intra-prediction modes (vs 9 in H.264), improved motion vector prediction and sample-adaptive offset filtering. The result is dramatically smaller files for the same quality, or much higher quality at the same bitrate. HEVC is the dominant codec for 4K UHD Blu-ray, broadcast UHD distribution, and HDR streaming on Netflix, Apple TV+, Disney+ and Amazon Prime Video. Critical for HDR, HEVC Main 10 profile supports 10-bit color essential for PQ and HLG transfer functions, and the HEVC bitstream natively carries HDR metadata (SMPTE ST 2086 mastering display metadata, SMPTE ST 2094-10 dynamic metadata for Dolby Vision). Typical delivery bitrates: 4K UHD HDR streaming 15–25 Mbps, 4K UHD Blu-ray 50–100 Mbps. HEVC's adoption has been slower than H.264 partly because of complex patent licensing (multiple pools — MPEG LA, HEVC Advance, Velos Media) and partly because hardware decoders took years to spread. AV1 is the royalty-free alternative gaining ground. Reference: ITU-T H.265 and ISO/IEC 23008-2. ## Handles URL: https://postproduction.studio/en/glossary/handles Domain: Editing Handles are extra frames of media retained before the in-point and after the out-point of every clip in a sequence, typically requested as a fixed duration like 24 frames (1 second at 24fps) or 48 frames (2 seconds). They give downstream departments the freedom to extend any cut without going back to source — the audio mixer might need an extra few frames to taper a reverb tail, the colorist might want more frames to design a transition, the VFX artist might need additional context for a tracking solve. Handles are typically specified when conforming or rendering output files for finishing: a turnover package to color or VFX includes each clip with its used in/out plus the requested handle length on each end, so the entire clip pulled to disk is somewhat longer than what appears in the cut. The handle length depends on workflow: 12 frames is tight, 24 is standard, 48 is generous, 96 or higher is reserved for productions with heavy ongoing revisions. Some studios specify scene-level handles (the entire scene preserved as a continuous clip), others specify clip-level. Handles consume disk space — a 100-minute feature with 24-frame handles can require 10-15% more storage than the locked cut alone. The change list propagated from editorial to downstream departments documents which handles each shot needs as the cut evolves. ## HDR (High Dynamic Range) URL: https://postproduction.studio/en/glossary/hdr-high-dynamic-range Domain: Image, Delivery HDR (High Dynamic Range) is a family of imaging technologies that captures, processes and displays a wider range of luminance and color than the SDR (Standard Dynamic Range) Rec.709 standard. Where SDR is limited to about 100 nits peak brightness, HDR formats target 1,000 to 10,000 nits, revealing detail in highlights (sun, specular reflections, neon) and shadows simultaneously. HDR uses new transfer functions (PQ — Perceptual Quantizer, SMPTE ST 2084, and HLG — Hybrid Log Gamma, ITU-R BT.2100) instead of the gamma 2.4 of Rec.709, because traditional gamma cannot describe the extended luminance range. The dominant standards are: HDR10 (10-bit, static metadata), HDR10+ (dynamic metadata, royalty-free), Dolby Vision (12-bit with dynamic metadata, the cinema and premium streaming standard), and HLG (broadcast-friendly, no metadata required). HDR mastering requires reference monitors (Sony BVM-HX310, Canon DP-V series) capable of at least 1000 nits and P3-D65 or Rec.2020 gamut coverage. The grading session produces a master at the target peak luminance (typically 1000 nits for streaming, 4000 nits for premium), from which SDR trims are derived. Streaming platforms (Netflix, Apple TV+, Disney+) mandate Dolby Vision or HDR10 masters for tier-1 originals. Reference: ITU-R BT.2100 (HDR system parameters) and SMPTE ST 2084 (PQ). ## HDR mastering URL: https://postproduction.studio/en/glossary/hdr-mastering Domain: Color Grading, Delivery The process of producing the final HDR master of a film or program, including color grading on a calibrated HDR display (PQ or HLG), authoring deliverables for HDR10, HDR10+ or Dolby Vision, and generating the SDR trim pass. ## HDR monitoring URL: https://postproduction.studio/en/glossary/hdr-monitoring Domain: Color Grading Using a calibrated HDR display (FSI, Sony BVM, Eizo, LG OLED Pro) to view images during grading or QC. Requires PQ Rec.2020 calibration typically at 1000 or 4000 nits peak. ## HDR trim pass URL: https://postproduction.studio/en/glossary/hdr-trim-pass Domain: Color Grading, Delivery A secondary grade that adjusts the HDR master to produce the SDR (Rec.709) deliverable. Dolby Vision automates this with metadata; HDR10 requires a manual trim pass. ## HDR10 URL: https://postproduction.studio/en/glossary/hdr10 Domain: Formats, Delivery HDR10 is the open, royalty-free HDR specification co-developed by the Consumer Technology Association and adopted by virtually every HDR-capable consumer display, Blu-ray Disc Association, streaming platform and HDR-capable game console. It combines PQ (Perceptual Quantizer, SMPTE ST 2084) transfer function for luminance encoding, Rec.2020 color primaries, 10-bit color depth, 4:2:0 chroma subsampling at delivery, and static metadata (SMPTE ST 2086 MaxCLL/MaxFALL plus mastering display luminance) describing the entire program. The static-metadata limitation means a single tone-mapping curve is applied to the whole title regardless of scene content — bright scenes and dark scenes share the same mapping, which can cause clipping in highlights or crushed shadows on displays with lower peak luminance than the master. HDR10+ (Samsung-led extension) and Dolby Vision both add dynamic metadata to address this, but HDR10 remains the universal baseline: every HDR-capable display must support it, and many streaming platforms use it as their fallback layer. Mastering for HDR10 typically targets 1000-nit or 4000-nit peak luminance, uses P3-D65 limited to Rec.2020 container, and produces a Main 10 HEVC bitstream for streaming or an HDR10 Blu-ray master. Reference: CTA-861-G (HDR10 signaling), SMPTE ST 2084 (PQ EOTF), SMPTE ST 2086 (mastering display metadata), and the UHD Alliance Premium Certified guidelines. ## HDR10+ URL: https://postproduction.studio/en/glossary/hdr10-plus Domain: Color Science, Delivery An open-standard HDR format extending HDR10 with dynamic per-scene metadata (similar to Dolby Vision but royalty-free). Used by Samsung, Panasonic, Amazon Prime Video. ## Highlight clipping URL: https://postproduction.studio/en/glossary/highlight-clipping Domain: Image, Color Science When highlight values exceed the sensor maximum capacity and saturate to white — losing all detail in that area. Once clipped, information is unrecoverable (except partial recovery from non-clipped channels). ## Highlight recovery URL: https://postproduction.studio/en/glossary/highlight-recovery Domain: Color Grading, Image A grading or RAW processing technique that reconstructs information in clipped highlights using the channels that are not saturated. Common in RED IPP2, BRAW, and Resolve RAW tab. ## HLG (Hybrid Log-Gamma) URL: https://postproduction.studio/en/glossary/hlg Domain: Color Science, Delivery A relative HDR transfer function (BT.2100) designed for broadcast — backwards-compatible with SDR displays. Used by BBC, NHK and live HDR broadcasts. Peak nominal at 1000 nits. ## IMF (format) URL: https://postproduction.studio/en/glossary/imf-format Domain: Formats, Delivery Interoperable Master Format — SMPTE ST 2067 standard packaging format used for delivering finished masters to studios, streamers and broadcasters. See also imf-package. ## IMF package URL: https://postproduction.studio/en/glossary/imf-package Domain: Formats, Delivery Interoperable Master Format — an SMPTE standard for distributing finished masters as componentized packages (CPL, audio, subtitles, images) consumed by Netflix, Disney+, broadcasters, and post houses. ## In-point / Out-point URL: https://postproduction.studio/en/glossary/in-point-out-point Domain: Editing In-point and out-point (often abbreviated In/Out, source-in/source-out, or just I and O) are the timeline markers that define the start and end of a media clip's usable region for editing. Setting an in-point marks the first frame to include in a cut; setting an out-point marks the last frame; the region between them is what will be inserted or overwritten into the sequence. The keyboard shortcuts I and O are universal across virtually every NLE (Avid, Premiere, Final Cut, Resolve, Lightworks), making in/out marking one of the most muscle-memorized actions in editing. Three-point editing (source-in, source-out, plus either record-in or record-out on the sequence) is the standard editing model derived from tape workflows — the missing fourth point is computed from the clip duration. Four-point editing (in/out on both source and sequence) requires a duration match and warns if they differ, useful for filling exact time slots in broadcast pipelines. Modern NLEs extend in/out marking with additional features: marking subclips (saving an in/out region as a reusable mini-clip), saving multiple in/out pairs as markers, and JKL trim mode which sets ins and outs by playing backwards/forwards during trim. The discipline of efficient in/out marking is a core differentiator between fast and slow editors. ## Indie finishing URL: https://postproduction.studio/en/glossary/indie-finishing Domain: Workflow, Delivery End-to-end post-production on a constrained budget: smaller post house or self-produced grade/mix, fewer iterations, optimized deliverables — yet meeting festival and platform technical standards. ## Interlaced Video URL: https://postproduction.studio/en/glossary/interlaced-video Domain: Formats, Image Interlaced video is a legacy encoding model where each frame is split into two fields — odd-numbered horizontal lines (the 'upper' field) and even-numbered horizontal lines (the 'lower' field) — captured at different points in time. The two fields together form one frame, but they sample the scene 1/60 second apart (NTSC) or 1/50 second apart (PAL). The technique was developed in the 1930s for cathode-ray tube broadcasting where the phosphor refresh rate could not sustain a flicker-free image at the full vertical resolution — interlacing effectively doubled the perceived temporal rate while using the same bandwidth as a progressive scan at half the framerate. Modern displays (LCD, OLED) inherently display progressive frames and must deinterlace incoming interlaced content. Interlacing causes visible 'combing' or 'tearing' artifacts when motion occurs between the capture of the two fields, particularly visible on horizontal motion. Modern productions almost universally capture in progressive mode (24p, 25p, 30p, 50p, 60p) avoiding interlacing entirely; legacy SD content (DVDs, older broadcast archives) remains interlaced and requires deinterlacing for modern delivery. The naming convention reflects framerate and field/frame: '1080i 30fps' is 60 fields per second (each frame being two interleaved fields); '1080p 60fps' is 60 progressive frames per second. Reference: ITU-R BT.601 and SMPTE 274M. ## JBOD URL: https://postproduction.studio/en/glossary/jbod Domain: Workflow Just a Bunch of Disks — multiple drives presented individually without RAID redundancy. Used for capture decks and large pools where the host handles redundancy via software (ZFS, Unraid). ## Keying URL: https://postproduction.studio/en/glossary/keying Domain: VFX Keying is the broader VFX practice of generating a matte (transparency mask) that isolates a foreground element from its background or context, enabling clean compositing. Chroma key is one type of keying (based on color matching), but the family includes luma key (based on brightness, separating dark or bright elements), difference key (based on subtracting a clean background plate to find what was added), depth key (based on a 3D depth map from a depth camera or generated by AI), and IR key (used in modern multi-band cameras). Each method has its use cases: chroma for general background replacement, luma for fire, sparks, smoke against dark skies, difference for shots where a clean plate exists (controlled studio scenes), depth for stereoscopic work or when subjects wear similar colors to the background. The output of any keying operation is a matte — an alpha channel where white means opaque and black means transparent. Edges are the hard part: hair, motion blur, transparent fabric, glass, smoke, and any semi-transparent element requires careful edge work and often manual roto cleanup. Modern AI-based keyers (Runway, Foundry CopyCat, Adobe Sensei, DaVinci Magic Mask) increasingly handle subjects that don't require a colored background, identifying people and objects via machine learning. The keyed element is then color-corrected, edge-treated, despilled, and composited with the new background. Reference: VES Handbook of Visual Effects chapter on matte generation. ## Layer mixer URL: https://postproduction.studio/en/glossary/layer-mixer Domain: Color Grading A Resolve node that combines multiple inputs using blend modes (normal, multiply, screen, overlay) and per-layer opacity. Similar to Photoshop layers within the node graph. ## Linear Light URL: https://postproduction.studio/en/glossary/linear-light Domain: Color Science, VFX Linear light is the encoding model in which signal values are directly proportional to actual scene luminance — twice the recorded value means twice the actual light from the scene. This is the natural physical relationship and the encoding used in scene-referred VFX work, particularly compositing and CG rendering. The OpenEXR format and ACEScg working space are both linear-light. In linear-light data, light addition, subtraction, multiplication and other compositing operations behave correctly — a 50% gray on top of a 50% gray gives twice the light value (a logical brightening), whereas in gamma-encoded data the math produces incorrect visual results. Linear light is, however, perceptually inefficient: human vision is highly nonlinear (we perceive much finer detail in shadows than in highlights of equal luminance ratio), so a linear encoding wastes a lot of code values in highlights and starves the shadows of precision. Display formats therefore apply a transfer function (gamma 2.4 for Rec.709, PQ for HDR) to encode for transmission efficiency, then linearize for math operations, then re-encode for display. The VFX pipeline typically does all heavy lifting in linear-light EXR files at 16-bit half-float precision, where math is well-behaved and there is no risk of banding from precision loss. The Filmic Blender and Academy Color Encoding System both rely on linear-light working spaces. ## Log image URL: https://postproduction.studio/en/glossary/log-image Domain: Image, Color Science An image encoded with a logarithmic transfer function (S-Log, LogC, V-Log, Log3G10, C-Log, D-Log) that preserves wide dynamic range in limited bit-depth. Requires CST or LUT in post for proper viewing. ## Logarithmic (Log) Curve URL: https://postproduction.studio/en/glossary/logarithmic-log-curve Domain: Image, Color Science A logarithmic (log) curve is a nonlinear transfer function used by digital cinema cameras to encode their full dynamic range into a limited number of code values (typically 10-bit, sometimes 12-bit) without clipping or banding. Where a linear or gamma-2.4 curve would either clip highlights or lose shadow detail, a log curve distributes code values logarithmically — many code values in shadow regions, fewer in highlights — closely matching how human vision responds to scene luminance. The result is footage that looks washed out and low-contrast on direct view (a 'flat' look) but contains the full sensor latitude available for grading. Each camera manufacturer uses their own log curve: ARRI Log C3 and Log C4, Sony S-Log2 and S-Log3, Canon C-Log2 and C-Log3, RED Log3G10 and Log3G12, Panasonic V-Log, Blackmagic Film. Conversion from log to a display look (Rec.709 SDR or Rec.2020 HDR) requires either a camera-specific technical LUT or, in ACES pipelines, the appropriate IDT followed by the RRT and ODT. The dynamic range preserved by a log curve typically exceeds Rec.709's 6 stops by another 7-8 stops, totaling 13-14 stops for high-end cinema cameras. Reference: each manufacturer publishes the math of their log curve — ARRI Alexa LogC4 specification, Sony S-Log3 technical note. ## Loudness URL: https://postproduction.studio/en/glossary/loudness Domain: Sound Loudness is the perceived volume of audio content, distinct from peak amplitude (which measures the largest sample value but does not correlate with how loud the audio feels to the listener). Modern broadcast, streaming and cinema all mandate loudness measurement using algorithms that approximate human hearing — most notably ITU-R BT.1770 (the algorithmic basis) and EBU R 128 (the European practical standard) and ATSC A/85 (the American equivalent). The unit is LUFS (Loudness Units Full Scale) or LKFS (same thing, different abbreviation), measured as an integrated average over an entire program. Standards specify target levels: -23 LUFS for European broadcast (EBU R 128), -24 LUFS for American TV (ATSC A/85), -27 LUFS for film theatrical delivery (a quieter mix that benefits from theater dynamic range), -14 LUFS for streaming music (Spotify, Apple Music, YouTube Music — though each platform applies its own normalization). True peak (dBTP) is monitored separately and must not exceed roughly -1 dBTP to avoid distortion on consumer playback devices. Tools include iZotope RX, Avid Pro Tools' integrated loudness meter, NUGEN Audio MasterCheck, TC Electronic Clarity M, and Auphonic for podcasts. A program that fails loudness compliance will be rejected by Netflix, BBC, broadcasters and most major platforms. Reference: ITU-R BS.1770-4, EBU R 128, ATSC A/85. ## Loudness normalization URL: https://postproduction.studio/en/glossary/loudness-normalization Domain: Sound, Delivery Automatic adjustment of program loudness to a target LUFS during streaming/playback. Spotify -14 LUFS, YouTube -14 LUFS, Apple Music -16 LUFS, Netflix -27 LUFS. Mastering targets must account for this. ## Low budget workflow URL: https://postproduction.studio/en/glossary/low-budget-workflow Domain: Workflow A workflow optimized for cost: BRAW or H.265 over RAW formats, in-the-box VFX, Resolve (free) for color/edit/fusion, ProRes 422 proxies, cloud collaboration to skip per-day suites. ## LTO (Linear Tape-Open) URL: https://postproduction.studio/en/glossary/lto Domain: Workflow, Delivery Magnetic tape backup format. Current LTO-9: 18 TB native per cartridge, ~400 MB/s read/write. Industry standard for long-term archive (30+ years shelf life). ## LUFS URL: https://postproduction.studio/en/glossary/lufs Domain: Sound, Delivery LUFS (Loudness Units relative to Full Scale, sometimes called LKFS in the older ITU standard) is the measurement unit for integrated loudness — the perceived volume of audio content averaged over its duration, weighted by the K-frequency curve to match human hearing sensitivity. The development of LUFS-based standards solved a real broadcasting problem: commercials sounded much louder than programs even when peak levels matched, because peak amplitude poorly correlates with perceived loudness. The ITU-R BS.1770 standard defined the loudness measurement algorithm, and EBU R128 (Europe), ATSC A/85 (US TV), and platform-specific targets (Netflix -27 LUFS short-form, -27 LUFS Atmos integrated; Apple Music -16 LUFS; Spotify -14 LUFS; YouTube -14 LUFS; broadcast typically -23 LUFS integrated) define delivery targets. Modern audio meters display three measurements: Momentary (400ms sliding window, instantaneous reading), Short-term (3-second sliding window), and Integrated (full-program average from start to end). A typical mix is judged by Integrated LUFS versus the target, plus Loudness Range (LRA, the dynamic range) and True Peak (the actual maximum samples, not the integer-sample peaks). Mixers ensure their final masters land at platform targets, applying limiting and loudness adjustment where needed without overcompressing dialogue. Tools: iZotope Insight, Waves WLM, NUGEN VisLM, Pro Tools' built-in loudness meter. Reference: EBU R128, ITU-R BS.1770. ## Luminance URL: https://postproduction.studio/en/glossary/luminance Domain: Image, Color Science Luminance is the photometric measure of perceived brightness, expressed in candelas per square meter (cd/m²) or nits in display contexts. It quantifies how bright a surface appears to the human visual system, weighted by the luminous efficiency function (the eye is most sensitive to green wavelengths around 555nm). In post-production, luminance underlies several core concepts: the Y channel of YUV/YCbCr color spaces (which separates brightness from color); the contrast and gamma curves that control midtone luminance; HDR display peak luminance specifications (1000 nits, 4000 nits, 10000 nits); SDR Rec.709's 100-nit assumed peak; and dynamic range calculations (stops of luminance from black to peak white). Luminance is distinct from light radiance (which is wavelength-uniform) and from value or lightness (which are perceptual). On the waveform monitor, the Y trace shows luminance distribution across the frame; on the parade, R, G and B traces show individual channel luminance contributions. Photometric measurements at acquisition use luminance meters (Sekonic, Konica Minolta) calibrated in nits. The PQ HDR transfer function is defined directly in nits of absolute display luminance, unlike Rec.709 gamma which is signal-relative. Understanding luminance is essential to grading HDR content correctly — a midtone gray at 50 nits in SDR maps differently across HDR formats. ## LUT URL: https://postproduction.studio/en/glossary/lut Domain: Color Grading A LUT (Look-Up Table) is a mathematical mapping from input pixel values to output pixel values, used throughout post-production to transform colors, apply creative looks, simulate output devices, or convert between color spaces. LUTs come in two main forms: 1D LUTs adjust each color channel independently (suitable for gamma curves and exposure shifts but not color cross-conversions) and 3D LUTs map combinations of RGB values to new RGB values, enabling complex transformations like camera-log to display-rec.709 conversion or stylized creative grades. Common file formats include .cube (Adobe/Resolve, widely portable), .3dl (Autodesk legacy), .csp (Cinespace), .vlt (Filmlight). Resolution matters: 17×17×17 is a low-cost preview, 33×33×33 is the editorial standard, and 65×65×65 or higher is used for finishing-grade conversions. LUTs are non-destructive (applied as a node or layer) but if baked into a file they become permanent. Critical workflow use cases: on-set monitoring (technical LUT from log to Rec.709 so the DoP and crew see a usable image), dailies generation, VFX plate handoff (round-trip LUTs ensure VFX matches the offline), and creative look development before grading. Limitations: LUTs are static (not parameter-driven), can introduce banding on 8-bit inputs, and high-saturation values may clip outside the LUT's defined cube. The Academy's CTL (Color Transformation Language) is the modern, higher-precision alternative for ACES. ## Mask URL: https://postproduction.studio/en/glossary/mask Domain: Color Grading, VFX A mask in post-production is a black-and-white image (or grayscale, for soft edges) that defines which regions of an image are affected by an operation and which are not. White (or fully opaque) regions of the mask indicate where the operation applies; black (transparent) regions are protected from the operation. Masks are used throughout the post-production pipeline: in color grading (a power window is a mask that limits a grade to a region), in compositing (a roto mask isolates a foreground element for a clean composite), in VFX painting (a clean-plate mask isolates the area being cleaned), and in motion graphics (a mask reveals an animated element over time). Masks differ from alpha channels in usage: alpha is the transparency channel inherent to an image, whereas a mask is typically generated externally for a specific operation. Masks can be hand-painted (rotoscoping), automatically generated by qualifiers (HSL key, depth key, luma key), tracked over time (animated rotoscoping for moving subjects), or derived from 3D scene data (cryptomatte, depth pass). Modern tools blend several approaches: Mocha Pro for planar tracking masks, Silhouette FX for fine roto work, DaVinci Resolve's Magic Mask for AI-assisted masking, Nuke's RotoPaint for traditional vector roto. Masks are stored typically as image sequences alongside the main plate, or as embedded vector roto data in tool-specific project files. Reference: Foundry Nuke documentation on roto and mask conventions. ## Mastering URL: https://postproduction.studio/en/glossary/mastering Domain: Delivery Mastering is the final technical preparation step that converts an approved edit and grade into the deliverable formats required by each distribution platform — theatrical DCP, streaming HDR and SDR, broadcast IMF, Blu-ray, social media versions, archival. It is distinct from grading (creative color work) and finishing (effects compositing, titles), focusing on format conformance, metadata, quality control and version management. A typical mastering session generates multiple parallel deliverables from a single source master: a 4K UHD Dolby Vision IMF for Netflix, an HDR10 4K Blu-ray ISO, a Rec.709 SDR HD for broadcast, a stereo and 5.1 mix for SDR and an Atmos mix for HDR. Each deliverable has strict specifications — Netflix's NP3 spec, Apple TV+'s technical guidelines, EBU R 128 for broadcast loudness, DCI for theatrical — that govern color space, bit depth, codec, container, audio levels, subtitle timing and metadata. Mastering engineers use tools like Colorfront Transkoder, Telestream Vantage, Marquise Mist, MTI Cortex and AWS MediaConvert to encode and validate. Quality control (QC) is mandatory: both automated (Vidchecker, Baton) and human review of every frame and every audio channel. The mastering deliverable is what the rights holder archives — a single master should serve all future distributions, which is why archive formats like IMF App 2e or ACES MXF/DCDM are preferred. Reference: Netflix Encoding Specifications, DPP technical delivery standards, SMPTE ST 2067 (IMF). ## Matchmove URL: https://postproduction.studio/en/glossary/matchmove Domain: VFX Matchmove is the VFX process of reconstructing the 3D camera motion of a live-action shot so that computer-generated elements can be added in correct perspective alignment. A matchmove artist analyzes a plate for unique tracking points (corners of objects, distinctive features), tracks them in 2D across frames, then computes the 3D camera position and orientation that explains all the 2D track positions simultaneously. Without an accurate matchmove, CG objects float unnaturally — a digital creature stepping on the floor must move in perfect lockstep with the camera or the illusion breaks immediately. Tools include PFTrack, SynthEyes, 3DEqualizer (the industry standard for high-end feature work), Mocha Pro (planar tracking for 2.5D work), and increasingly automated solutions in Nuke (CameraTracker), Blender (motion tracker) and Foundry's CaraVR. The output is a 3D camera animation file (typically FBX, ABC, or USD) that downstream artists import into Maya, Houdini or other DCCs to position their CG elements. Matchmove quality is measured by reprojection error — projecting the solved 3D scene back through the solved camera should produce pixel-accurate matches to the original 2D tracks. Errors over 1 pixel per frame indicate problems. On-set survey data (LIDAR scans, measured set dimensions, witness camera positions) greatly assists matchmove and is often part of the VFX data acquisition package. Reference: SIGGRAPH papers on structure-from-motion algorithms. ## Matte URL: https://postproduction.studio/en/glossary/matte Domain: VFX A matte is a mask used specifically in compositing to define the opaque and transparent regions of a foreground element, allowing it to be combined with a background. The term derives from optical printing: a matte was originally a piece of opaque material placed between film and a printer light, blocking exposure of some regions while letting light through others. In digital compositing, matte refers to the alpha-channel-equivalent layer that says 'this part of the foreground exists, this part is transparent.' Mattes are produced by various techniques: green/blue screen chroma keying generates a matte automatically from color information; difference matting subtracts a clean plate from a shot with subject to derive the matte; rotoscoping manually draws frame-by-frame mattes for situations where keys don't work (subjects in front of complex backgrounds, smoke, hair); difference keying combines two takes (one with subject, one without); luma keying isolates based on brightness; and AI-based matting (Adobe Sensei, Resolve Magic Mask) increasingly automates traditional roto. Soft mattes (anti-aliased edges with partial transparency) are essential for natural compositing — hard-edged mattes look pasted. Matte refinement workflows include edge erosion, motion blur application, despill (reducing green/blue cast on the foreground subject's edges), and edge defringing. Reference: Brinkmann's 'The Art and Science of Digital Compositing' covers matte generation theory comprehensively. ## MaxCLL URL: https://postproduction.studio/en/glossary/maxcll Domain: Color Science, Delivery Maximum Content Light Level — the brightest pixel value (in nits) anywhere in the program. Used as static HDR10 metadata to inform displays of the peak luminance for tone mapping. ## MaxFALL URL: https://postproduction.studio/en/glossary/maxfall Domain: Color Science, Delivery Maximum Frame Average Light Level — the highest average luminance of any single frame in the program, in nits. Static HDR10 metadata used alongside MaxCLL for tone mapping. ## MD5 verification URL: https://postproduction.studio/en/glossary/md5-verification Domain: Workflow, Image A 128-bit hash function used to verify file integrity after copying. Now considered insufficient against tampering, but standard for on-set media verification (Shotput Pro, Hedge, Silverstack). ## Mezzanine File URL: https://postproduction.studio/en/glossary/mezzanine-file Domain: Formats, Delivery A mezzanine file is an intermediate-quality master format used for post-production work that sits between the original camera capture (often RAW or lightly compressed log) and the final compressed delivery file. The role of a mezzanine is to preserve enough quality for grading, VFX work and additional revisions without the storage burden and decoding cost of working directly on RAW. Common mezzanine codecs include ProRes 422 HQ, ProRes 4444 XQ, Avid DNxHR HQX, DNxHR 444, JPEG 2000 (in IMF and DCP contexts), and Cineform. Mezzanine files are typically 10-bit or 12-bit, 4:2:2 or 4:4:4 chroma subsampled, and significantly lighter than RAW (a 4K mezzanine at ProRes 422 HQ is around 750 Mbps; the equivalent ARRI RAW is around 1.5 Gbps for compressed RAW or 5+ Gbps for uncompressed). A typical pipeline transcodes camera originals to mezzanine for color grading, finishes the grade in that mezzanine, and only renders final deliverables (H.265, JPEG 2000) at the very end. The choice between mezzanine codecs depends on downstream tooling — broadcast pipelines often standardize on DNxHR, feature film and streaming pipelines on ProRes 4444, and theatrical pipelines on JPEG 2000 for DCP-readiness. Mezzanine masters also serve as archive copies, deliverable to network or studio retention. ## Middle gray URL: https://postproduction.studio/en/glossary/middle-gray Domain: Image The 18% reflectance reference patch — historically the calibration anchor for exposure meters. In log encodings: Sony S-Log3 = 41% code value, ARRI LogC = ~38%, Canon C-Log2 = ~32%. ## Mixing (Audio) URL: https://postproduction.studio/en/glossary/mixing-audio Domain: Sound Audio mixing is the final stage of sound post-production where dialogue, music, effects and ambience are blended and processed into the final audio deliverable, balancing levels, panning sources spatially, applying EQ and dynamics processing, and conforming to delivery-spec loudness targets. The mix is performed in dedicated mixing stages with calibrated monitoring systems matching the eventual playback environment: a theatrical mix is performed in a Dolby Atmos- or 7.1-equipped dub stage, a streaming mix on near-field speakers calibrated to streaming target loudness (-27 LKFS for Atmos, -23 LKFS for Dolby Pro Logic II downmix). Modern mixing is largely a 3-mixer process: dialogue mixer focuses on balancing speech intelligibility and consistency across cuts and ADR; effects mixer balances foley, hard effects and ambience; music mixer balances score and source music against the rest. The dub mixer (or re-recording mixer) makes overall balance and creative decisions. The output is a series of stems (Dialogue, Music, Effects, alternate language) and final delivery mixes (5.1, 7.1, Atmos, stereo, mono for accessibility). Mixing requires understanding of loudness standards (EBU R128 for broadcast, ATSC A/85 for US TV, Netflix's various stream targets), spatial sound formats, and the artistic shaping of an emotional arc through audio. Reference: Holman, 'Sound for Film and Television.' ## Motion Blur URL: https://postproduction.studio/en/glossary/motion-blur Domain: VFX, Image Motion blur is the apparent streaking of moving objects within a single frame, caused by movement during the exposure interval of the camera or rendering. In live-action capture, motion blur is determined by shutter angle (or shutter speed in still photography terms): a 180° shutter at 24fps means each frame is exposed for 1/48 second, during which any motion in the scene smears across the sensor proportionally. Motion blur is essential to the perception of smooth motion in 24fps cinema — without it, fast movement appears strobed and unnatural. The 180° shutter rule is the cinematographer's traditional convention. In VFX, motion blur must be carefully matched between live plate and CG elements: a rendered CG creature without motion blur composited onto a 180°-shutter live plate looks pasted, while motion blur applied incorrectly (wrong direction, wrong amount) looks worse than none at all. CG renderers compute motion blur either at the rendering stage (more accurate, more expensive — Arnold's vector motion blur, RenderMan's deformation motion blur) or as a 2D post-process applied to flat rendered frames (faster but less accurate, especially for rotational motion). In post-production, motion blur can be added or removed: Twixtor and Optical Flow generate motion blur for slow-motion ramps, while motion blur removal tools like REDGiant Universe attempt to deblur (results vary). Reference: Cinematography texts (Brown's 'Cinematography') discuss shutter angle in depth. ## Multiband compression URL: https://postproduction.studio/en/glossary/multiband-compression Domain: Sound Compression applied to separate frequency bands independently — controls problematic ranges (boomy lows, harsh highs) without affecting the rest. Common in mastering and broadcast loudness control. ## NAS URL: https://postproduction.studio/en/glossary/nas Domain: Workflow Network Attached Storage — file-level shared storage on the local network (SMB/NFS). Easy to deploy, suitable for small/medium post studios. Throughput limited by network (1–25 GbE). ## Nearline storage URL: https://postproduction.studio/en/glossary/nearline-storage Domain: Workflow Fast-access secondary storage between online (active editing) and cold archive — typically NAS or SAN with 10–100 TB used for current and recent projects accessed weekly. ## Netflix delivery URL: https://postproduction.studio/en/glossary/netflix-delivery Domain: Delivery The strict specifications Netflix requires for original content delivery: IMF package, ProRes 4444 XQ or J2K, 10-bit 4:2:2 minimum, specific loudness, captions, multi-language. Detailed in the Netflix Partner Help Center. ## Nit URL: https://postproduction.studio/en/glossary/nit Domain: Color Science A unit of luminance equal to one candela per square meter (cd/m²). 100 nits = SDR white reference; 203 nits = HDR diffuse white; 1000–10000 nits = HDR peak range. ## Node tree URL: https://postproduction.studio/en/glossary/node-tree Domain: Color Grading The visual node graph in the Color page of Resolve. Each node represents a grading operation; data flows left to right with optional parallel branches and layer mixers. ## Node-based Compositing URL: https://postproduction.studio/en/glossary/node-based-compositing Domain: VFX, Workflow Node-based compositing is the workflow architecture used by professional compositing tools (Nuke, Flame, Fusion, Natron) where image operations are represented as connected nodes in a directed graph rather than stacked layers as in After Effects' layer-based model. Each node represents one operation (read a file, scale, color correct, key, merge with another stream), and connections between nodes describe data flow. The advantages over layer-based composition are substantial: non-destructive editing (any node can be modified at any point without re-rendering downstream), reuse (one color correction node can feed multiple branches), branching (one source can be processed two different ways in parallel), explicit dependency tracking (Nuke knows exactly which nodes affect which others), and clarity at scale (a complex composite of 50 elements is comprehensible as a node graph in ways a 50-layer stack rarely is). Foundry's Nuke is the industry standard, with Autodesk Flame, Blackmagic Fusion, and the open-source Natron as alternatives. Each operation runs at the pixel-level resolution of its output: a 4K plate processed through a graph remains at 4K precision throughout. The node graph also supports Python and TCL scripting for automation and complex effects. Limitations include a steeper learning curve than layer-based tools, more complex project file management, and the need to think in dependencies rather than stacking order. Reference: Foundry Nuke documentation and 'The Art and Science of Digital Compositing' by Brinkmann. ## Noise Reduction URL: https://postproduction.studio/en/glossary/noise-reduction Domain: Image, Sound Noise reduction in post-production refers to algorithms that suppress unwanted random variations in pixel values — typically caused by high ISO sensor noise, low-light capture or aggressive grain in film scans — while preserving genuine image detail. Two main approaches: spatial noise reduction analyzes each frame independently looking for non-random patterns (edges, textures) vs. random variation (noise) and smoothing only the latter; temporal noise reduction compares pixels across multiple consecutive frames, recognizing that static or slowly-changing areas should have the same value frame-to-frame and averaging out the variations that don't fit. Modern tools combine both with motion compensation: motion vectors track moving objects so the temporal averaging follows them rather than smearing. Leading tools include Neat Video (cross-platform plugin), DaVinci Resolve Noise Reduction (spatial + temporal, GPU-accelerated, included in Studio version), Topaz Video AI (AI-driven enhancement and denoise), Foundry's Furnace toolset for Nuke, and Cortex Enterprise. Noise reduction is destructive to detail: aggressive settings smooth out skin texture, soften eyes, eliminate film grain, and produce a synthetic 'waxy' look that is hard to undo. Best practice is to apply minimally and selectively — often with power windows or masks isolating the noisy areas (skin, shadows) and leaving the rest untouched. For HDR content, where noise in shadows becomes more visible, noise reduction is increasingly important and is often performed at the grading stage. Reference: documentation for Neat Video, DaVinci Resolve Noise Reduction and the Foundry Furnace plugins. ## Non-Linear Editing (NLE) URL: https://postproduction.studio/en/glossary/non-linear-editing-nle Domain: Editing Non-linear editing (NLE) is the digital editing methodology that allows any frame to be accessed instantly without sequentially scrolling through tape, fundamentally enabling all modern post-production. The term originated in contrast to linear tape-based editing where a cut required physically copying segments between source and master tapes in order. The first commercially significant NLE systems — Avid/1 (1989), Lightworks (1989), CMX-6000 (1987) — used disk-based random access to footage, allowing editors to assemble, rearrange and revise cuts as freely as a word processor handles text. Today's NLEs include Avid Media Composer (dominant in broadcast and feature drama), Adobe Premiere Pro (broadest professional adoption, integrated with After Effects, Photoshop), Final Cut Pro (Apple's NLE, popular in independent and documentary work), DaVinci Resolve (the only major tool with full editing, color, audio and VFX in one app), and Lightworks/Vegas/Edius for niche specialties. Modern NLEs share core concepts: bins for media organization, timelines with multiple video and audio tracks, three-point editing (in/out source + insert point), trim mode, ripple/roll/slip/slide edits, multicam editing, and proxy workflows for high-resolution media. The shift from linear to non-linear editing in the 1990s was as fundamental to post-production as the introduction of word processing was to writing. ## NVMe cache URL: https://postproduction.studio/en/glossary/nvme-cache Domain: Workflow A fast solid-state cache (NVMe over PCIe) layered between slow archival storage and active workstations. Speeds up playback of heavy media (BRAW, REDCODE) and improves grading responsiveness. ## Object-based Audio URL: https://postproduction.studio/en/glossary/object-based-audio Domain: Sound Object-based audio is the audio paradigm in which sounds are stored as discrete objects with associated 3D spatial metadata, rather than mixed down to fixed channels. The renderer at playback time positions each object in the listener's actual speaker configuration, allowing the same content to play optimally on a 5.1 home theater, a 9.1.6 Atmos installation, or a binaural headphone setup. Dolby Atmos is the dominant consumer object-based format; MPEG-H (used in Korean and Chinese broadcasting) and DTS:X are alternatives. The advantages over channel-based mixing are substantial: a sound effect of a helicopter flying overhead is positioned by metadata and renders to whichever overhead speakers exist (or doesn't, gracefully degrading to surround if no overhead speakers exist); a dialogue line panned slightly off-center renders precisely on a 7-channel Atmos system without becoming over-localized on a 2-speaker stereo system; immersive content can be authored once and play in many configurations. Object-based mixing requires Dolby Atmos Production Suite or equivalent, a calibrated Atmos monitoring environment, and substantial training for mixers accustomed to channel-based workflows. Netflix, Apple TV+, Disney+, and major theatrical releases now ship Atmos masters routinely. Reference: Dolby Atmos Music Best Practices documentation. ## ODT (Output Device Transform) URL: https://postproduction.studio/en/glossary/odt-output-device-transform Domain: Color Science An ODT (Output Device Transform) is the final stage of the ACES color pipeline, a transform that converts working-space color data into the specific output color space and transfer function required by a delivery target. Each ODT corresponds to a specific delivery: Rec.709 SDR, Rec.2020 PQ 1000 nits HDR, P3-D65 theatrical, P3-D60 ST 2084, Rec.709 broadcast 100 nits. The ODT is paired with the RRT (Reference Rendering Transform), which is shared across all outputs — first the RRT applies a global film-like tone mapping to scene-referred ACES data, then the ODT performs the final mapping to the target's specific gamut and transfer function. This architecture means a single graded ACES sequence can produce Rec.709 SDR, HDR10, Dolby Vision and theatrical P3 deliverables simply by swapping ODTs. The Academy maintains the official ODT library at acescentral.com; new ODTs are added as new delivery formats emerge (Dolby Vision IQ, HDR10+, etc.). ODTs are also used in 'pre-grading' workflows: an ARRI Alexa shot in Log C is processed through its IDT into ACES, then through the appropriate ODT for the on-set monitor, giving the DoP a viewable image at the corrects delivery target. Modern color tools (Resolve, Baselight, Nuke) ship with full ACES ODT libraries built-in. Reference: ACES central documentation, particularly the IDT/RRT/ODT pipeline diagrams. ## OETF (Opto-Electronic Transfer Function) URL: https://postproduction.studio/en/glossary/oetf-opto-electronic-transfer-function Domain: Color Science, Image The OETF (Opto-Electronic Transfer Function) is the encoding side of a transfer function chain: the mathematical curve that converts scene luminance (optical input from a camera sensor or rendered linear light) into an encoded signal value (electrical signal stored in the file). It is the counterpart to the EOTF (the display side, converting signal back to luminance). For Rec.709 broadcast, the OETF is approximately a 1/2.0 power function — the camera encodes brightness raised to roughly the 0.5 power — paired with a 2.4-power EOTF on the display side. This asymmetry exists by historical accident and dim-viewing-room compensation, not as a pure mathematical inversion. For HDR formats, OETFs are more carefully defined: PQ does not technically have an OETF (it is defined as an EOTF only, since it is absolute-luminance based), while HLG defines both an OETF and an EOTF that are mutually consistent. Camera log curves (S-Log3, Log C, V-Log) are also OETFs — they encode wide-latitude scene luminance into limited code value space, with the corresponding decoding curve being the camera-specific reverse transform applied via LUT or IDT. The conceptual distinction between OETF and EOTF matters in modern color management because some operations (compositing, grading at scene-linear) need to undo the OETF, perform math, then re-encode. Reference: ITU-R BT.2100 distinguishes OETF and EOTF clearly for HLG and PQ. ## Offline Editing URL: https://postproduction.studio/en/glossary/offline-editing Domain: Editing Offline editing is the creative editorial phase where the editor assembles the story using lightweight proxy or low-resolution media, rather than the original high-resolution camera files. The term dates from tape-era workflows where the offline edit was done on cheaper, lower-bandwidth equipment using duplicate cassettes, while the final 'online' conform was done on broadcast-grade tape decks. In modern file-based workflows, offline editing uses transcoded proxies (typically ProRes 422 LT or DNxHR LB at 1/2 or 1/4 resolution) generated from camera originals during ingest. This allows the editor to work fluidly on a laptop with multiple video streams, complex transitions and effects previews, without the storage and CPU demands of native 4K, 6K or 8K material. Once picture lock is achieved, the editorial XML or AAF is exported and conformed against the original camera files for finishing (color grading, VFX, audio mix). The offline/online split is essential to feature film and high-end episodic workflows; in faster turnaround pipelines (news, social, short-form) editors increasingly work natively on the originals using on-the-fly proxies generated by the NLE. The offline phase represents typically 60-80% of total editorial time. Tools: every major NLE supports offline proxy workflows, with DaVinci Resolve and Premiere offering particularly seamless online conform. ## Offload URL: https://postproduction.studio/en/glossary/offload Domain: Workflow, Image The process of copying camera media (CFexpress, SxS, SSD) to a verified backup. Always uses checksums and creates at least 3 copies on different media types per the 3-2-1 backup rule. ## OMF (Open Media Framework) URL: https://postproduction.studio/en/glossary/omf-open-media-framework Domain: Workflow, Formats OMF (Open Media Framework, sometimes called OMFI) is an older editorial interchange format developed by Avid in the early 1990s, designed like AAF to carry both essence and edit metadata between systems but with a simpler, more limited scope. OMF was widely used for transferring audio from picture editorial (Avid Media Composer) to sound post (Pro Tools) before AAF largely replaced it for new projects. It comes in two variants: OMFI Composition Only (references external media files, lightweight) and OMFI Composition With Media (audio embedded in the file, self-contained). Modern OMF files cap at 2 GB of embedded media (a 32-bit file format limit), which restricts practical use on long features or high-resolution audio. Limitations include: no support for ProTools-specific plugin data, no clip gain automation beyond basic level breakpoints, restricted video metadata, and clip-naming conventions that differ between Avid and other vendors. OMF has been largely deprecated in favor of AAF (which lifted the file size limit and added richer metadata) but is still occasionally encountered when working with archival projects, older Avid systems, or audio engineers who prefer its predictability. Tools like Pro Tools, Logic, Nuendo and Reaper still read OMF; Avid maintains backward export support. Reference: original OMFI specification published by the OMF Developers' Desk in 1996. ## Online Editing URL: https://postproduction.studio/en/glossary/online-editing Domain: Editing, Workflow Online editing is the technical conform and finishing phase that follows offline editorial, in which the proxy-based cut is reassembled against the original high-resolution master files and finalized for delivery. The 'online' label dates from tape workflows where the final master was assembled on expensive broadcast-grade equipment with the studio audio engineer and colorist on call. In contemporary file-based workflows, online editing combines several tasks: conforming the offline EDL/AAF/XML to original camera media; addressing any clip-replacement issues (missing files, codec mismatches); applying any final VFX shots and motion graphics; resolving aspect ratio and frame rate harmonization; performing final clean-up of mattes, color shifts, technical errors; and rendering deliverables in target codecs and resolutions. Most online sessions today happen in DaVinci Resolve, Baselight or Avid Media Composer (for broadcast finishing), with the colorist and online editor often the same person on independent productions or split roles in larger ones. The deliverable phase that follows — generating IMF packages, DCPs, broadcast tape masters, streaming H.265 files — is sometimes considered part of online, sometimes a separate mastering step. Tools also include Autodesk Flame and Smoke for high-end VFX-heavy finishing. The online phase is typically 10-20% of editorial duration but disproportionately important for quality. ## OpenColorIO (OCIO) URL: https://postproduction.studio/en/glossary/opencolorio-ocio Domain: Color Science, Workflow OpenColorIO (OCIO) is an open-source color management framework originally developed by Sony Pictures Imageworks and now maintained by the Academy of Motion Picture Arts and Sciences as an Academy Software Foundation project. It provides a vendor-neutral way to manage color transformations across all the applications in a VFX, animation and post-production pipeline — Nuke, Maya, Houdini, Katana, DaVinci Resolve, Blender, Foundry Mari, Substance Painter and many others ship with OCIO support built in. A typical OCIO config defines the available color spaces (linear, log, sRGB, Rec.709, ACEScg, ACEScct, etc.), the transformations between them (1D LUTs, 3D LUTs, matrices, log curves), and 'roles' that map abstract intent (scene-linear, compositing-log, color-picking) to concrete spaces. The Academy maintains the official ACES OCIO config which encodes the entire ACES pipeline (IDTs, RRTs, ODTs) in OCIO format, allowing every supporting application to perform identical ACES transformations. OCIO 2.0 (released 2021) added support for more accurate per-pixel processing, dynamic transforms, and better integration with GPU pipelines. Studios typically maintain custom OCIO configs that extend ACES with show-specific working spaces and creative LUTs. Reference: opencolorio.org and the official documentation maintained by the OCIO Technical Steering Committee under the Academy Software Foundation. ## Optical Flow URL: https://postproduction.studio/en/glossary/optical-flow Domain: VFX, Image Optical flow is the per-pixel motion vector field that describes how each pixel in one frame moves to its position in the next frame, used as the foundation for retiming, frame interpolation, motion blur synthesis, denoising and stabilization. Computing optical flow involves comparing two frames pixel-by-pixel and inferring the direction and magnitude of each pixel's displacement; modern algorithms use a combination of brightness constancy assumptions, smoothness constraints, and AI-based methods (RAFT, FlowNet) to produce dense, accurate flow fields. The primary use case in editorial is frame rate conversion: turning 24fps footage into slow motion at 60fps requires generating intermediate frames that don't exist in the original; optical flow synthesizes these by warping pixels along the computed motion paths. Tools include Twixtor (RE:Vision Effects, the longstanding feature standard), Twixtor's built-in flow algorithm, RE:Vision's RE:Flow, Adobe Premiere/After Effects' Pixel Motion, DaVinci Resolve's Speed Warp and Resolve's Optical Flow (used for retiming and deinterlacing). Quality optical flow requires sufficient texture (uniform regions like skies are hard to flow), absence of rapid occlusions (subjects crossing each other), and freedom from severe motion blur in the input. Failed flow produces visible artifacts: smeared edges, ghosting, melted edges on uncovered regions. Reference: 'A Database and Evaluation Methodology for Optical Flow' (Baker et al.) defines benchmark datasets. ## Optimized media URL: https://postproduction.studio/en/glossary/optimized-media Domain: Workflow, Editing An automatic transcode-on-import feature in Resolve that creates lower-bitrate proxies (ProRes 422 or DNxHR) used during editing or grading to lighten GPU load. Toggled per clip. ## OTT URL: https://postproduction.studio/en/glossary/ott-streaming Domain: Delivery Over-The-Top — content delivered directly to viewers over the internet, bypassing traditional broadcast/cable infrastructure. Netflix, Disney+, Prime Video, Apple TV+, Hulu are OTT services. ## Parallel node URL: https://postproduction.studio/en/glossary/parallel-node Domain: Color Grading A Resolve node structure where multiple branches process the same input simultaneously and combine additively. Useful for stacking corrections without compounding effects. ## Picture Lock URL: https://postproduction.studio/en/glossary/picture-lock Domain: Editing, Workflow Picture lock is the formal milestone in editorial where the director and editor agree that no further changes will be made to the cut. From that point forward, all downstream departments — sound design, music, VFX, color, mastering — work to a fixed timeline. Picture lock is signed off in writing or formally announced because every minute of subsequent change cascades through enormous downstream costs: sound effects need to be re-synced or re-created, music cues lose timing, VFX shots may need re-rendering, color grading on the affected segments has to be redone. In a structured production, picture lock happens after a series of editorial milestones: rough cut, director's cut, producer's cut, fine cut, locked picture. The lock is sometimes preceded by 'picture lock for sound' and 'picture lock for VFX' if certain departments need to start earlier. Practically, picture lock means the conform reference (the EDL/XML/AAF) becomes authoritative and any further change requires re-conform and partial redo of downstream work. Streaming releases sometimes break this discipline with last-minute editorial tweaks for ratings or compliance, which post houses internally call 'picture lock with carve-outs' — costly and risky. The discipline of true picture lock is one of the strongest predictors of an on-budget, on-schedule post-production. Reference: editorial workflow standards from PGA (Producers Guild of America) and various studio post-production handbooks. ## Pipeline URL: https://postproduction.studio/en/glossary/pipeline Domain: Workflow A pipeline in post-production is the structured sequence of processes, tools and data flows that takes a project from acquisition through to final delivery. Pipelines differ by genre and scale — a YouTube channel pipeline might fit on one computer with three apps, while a Marvel feature pipeline involves hundreds of artists across dozens of vendors and thousands of file types — but all share common structural patterns: ingest (camera media checksumming, transcoding, metadata logging), organization (project structure, naming conventions, version tracking), editorial (NLE with proxy workflow), VFX (shot tracking, vendor handoff, finalize-and-ingest), color (conform, grade, deliver), sound (spotting, ADR, foley, mix, deliver), mastering (DCP, IMF, broadcast, streaming versions), QC (validation across deliverables), and archival (LTO tapes, cloud cold storage). Pipeline tools include: project management (Shotgrid, ftrack, Cinesync), data movement (Aspera, Signiant, Hightail Express), version control (cloud-based and proprietary), render management (Deadline, Tractor, Royal Render), and review systems (Frame.io, Wipster, Reviewstudio). Modern feature pipelines integrate increasingly with virtual production stages (LED walls running real-time UE5 or Unity), cloud rendering, and AI-assisted tools (auto-rotoscoping, denoise, upscale). The post-production supervisor is the pipeline's air traffic controller, ensuring every department receives correct data on schedule. Reference: VES (Visual Effects Society) publishes pipeline reference architectures. ## Plate URL: https://postproduction.studio/en/glossary/plate Domain: VFX, Image A plate in VFX terminology is the original camera footage destined for compositing — typically without any VFX work yet applied — that serves as the base layer onto which CGI, additional elements and effects will be composited. The term originates in optical printing (a glass plate was used for matte paintings combined with live action). Modern plate workflows include several variants: the clean plate (a take of the empty scene with no actors, used for paint-out work, set extensions, and as a reference for derived mattes), the background plate (a wide establishing shot to be enhanced with CG elements), the action plate (the principal photography take containing performance), the lighting reference plate (often a gray ball and chrome ball or color chart shot before each take to record lighting conditions for CG matching), and the witness camera plates (secondary cameras providing alternative angles for tracking and CG reference). Plates are typically delivered to VFX vendors as 16-bit OpenEXR sequences at full camera resolution with the camera's original color space tagged, plus any associated handles. The plate is the foundation document of a VFX shot — every CG element must integrate convincingly with its lighting, lens characteristics, grain, motion and color. Plate quality directly affects VFX cost: a well-shot plate with reference balls, witness cameras and clean continuity reduces VFX time and budget. Reference: VES Handbook of Visual Effects, chapter on plate cinematography. ## Power Window URL: https://postproduction.studio/en/glossary/power-window Domain: Color Grading A power window is a geometric mask (typically a circle, rectangle, polygon or bezier shape) drawn directly on a frame in a color grading tool, used to isolate a spatial region for localized grading. The colorist might draw a circular power window around an actor's face to lift it out of shadow without affecting the rest of the frame, an elliptical window over the sky to deepen its blue, or a rectangular window down the center of the frame to apply a vignette darkening the edges. Power windows can be static (fixed across the shot) or animated (keyframed or tracked to follow movement). When a power window is tracked, it follows the spatial movement of a subject — a face moving across the frame retains the targeted grade. Modern grading tools combine power windows with HSL qualifiers (color-based isolation) for surgical precision: a window restricts the qualifier to a specific region (only grade the skin tones within this window, not skin tones elsewhere). DaVinci Resolve coined the term 'power window' which has become generic across tools; Baselight calls equivalents 'shapes,' Lustre 'windows,' Symphony 'spot color.' Animated and tracked power windows are where colorists spend much of their secondary grading time. Reference: Blackmagic Design's DaVinci Resolve Color Page Manual covers power window mechanics in detail. ## PQ (Perceptual Quantizer) URL: https://postproduction.studio/en/glossary/pq-perceptual-quantizer Domain: Color Science, Delivery PQ (Perceptual Quantizer), standardized as SMPTE ST 2084 and used in HDR10, HDR10+ and Dolby Vision, is an electro-optical transfer function (EOTF) designed by Dolby that maps 10-bit or 12-bit signal values to absolute luminance values from 0 to 10,000 nits. Unlike gamma curves which describe a relative relationship between signal and brightness, PQ encodes absolute luminance: a code value corresponds to a specific cd/m² regardless of display capability. The curve is derived from the Barten model of human contrast sensitivity, allocating signal codes such that each step is just below the threshold of human perception — making 12-bit PQ visually equivalent to a much higher-bit linear encoding. Because PQ encodes absolute luminance, the display must know the encoding's intent and tone-map accordingly: a master prepared at 1000-nit peak will be rendered differently on a 500-nit display than on a 4000-nit one. Static metadata (SMPTE ST 2086, MaxCLL, MaxFALL) or dynamic metadata (SMPTE ST 2094 for HDR10+ and Dolby Vision) guides this mapping. PQ is the dominant HDR encoding for streaming, Blu-ray and Dolby Vision masters; HLG is the alternative for broadcast. Critically, PQ requires 10-bit minimum and 12-bit for highest quality — 8-bit PQ would show severe banding. Reference: SMPTE ST 2084 (the PQ EOTF specification) and ITU-R BT.2100. ## PQ curve URL: https://postproduction.studio/en/glossary/pq-curve Domain: Color Science Perceptual Quantizer (ST.2084) — the absolute transfer function used for HDR10 and Dolby Vision. Encodes luminance from 0 to 10000 nits in 10 or 12 bits with perceptual uniformity. ## Primary Color Grading URL: https://postproduction.studio/en/glossary/primary-color-grading Domain: Color Grading Primary color grading is the first creative phase of grading, in which the colorist establishes the overall tonal character of each shot by adjusting parameters applied to the entire frame at once. The primary controls are organized into three or four tonal zones: lift (or shadows), gamma (or midtones), gain (or highlights), and on some platforms offset (a constant added uniformly to all values). Each of these zones can be independently adjusted for color (R, G, B balance or color wheel rotation) and luminance. The ASC CDL standard encodes the primary correction in just nine parameters per shot — Slope, Offset and Power per channel — making it the most portable form of color metadata. A typical primary grade pass involves: setting the white point (gain/highlights) so that bright neutrals look correctly white; setting the black point (lift/shadows) so deep shadows have appropriate weight without being crushed; setting the midtone gamma to control overall mid-frame brightness; and adjusting per-channel color balance to neutralize unwanted casts or warm the shot toward an intended emotional temperature. Primaries are non-destructive and are stored as a node tree in modern grading apps. The primary pass is foundational — secondaries (isolated region adjustments) and stylistic effects (film emulation, grain) build on top of it. Reference: the ASC CDL specification and grading textbooks by Walter Murch, Patrick Inhofer, Alexis Van Hurkman. ## Progressive Video URL: https://postproduction.studio/en/glossary/progressive-video Domain: Formats, Image Progressive video (often denoted with a lowercase 'p' as in 720p, 1080p, 4Kp) is the modern video encoding model where each frame is a complete sample of the scene at one instant in time, with all horizontal lines captured simultaneously. This is in contrast to interlaced video where each frame is split into two fields captured at different times. Progressive scan was standard for film projection (24 frames per second progressive, each frame fully exposed at one instant) but had to wait for CRT-replacement display technology (LCD, plasma, OLED) and HD broadcast standards before becoming the dominant video format. Today nearly all modern production captures progressively at 24p (the cinema standard), 25p (PAL territories), 30p (NTSC progressive), 50p or 60p (high-framerate broadcast and slow-motion), or higher (high frame rate HFR cinema like Gemini Man at 120p). Progressive video has no combing artifacts on motion, no need for deinterlacing at the display, and integrates cleanly with modern compositing and motion graphics. The temporal characteristics of 24p, 30p and 60p differ substantially in feel: 24p has cinematic motion blur and judder, 60p has soap-opera smoothness, 30p sits between. For HDR and modern delivery, progressive is universal. Legacy interlaced content from archives must be deinterlaced for modern streaming. Reference: ITU-R BT.709 progressive HD standards. ## ProRes URL: https://postproduction.studio/en/glossary/prores Domain: Formats Apple ProRes is a family of lossy intra-frame video codecs developed by Apple and used as the de facto mezzanine standard for post-production workflows in editorial, color grading, VFX and finishing. The family includes ProRes 422 Proxy (very small, used for offline editing on laptops), ProRes 422 LT (lightweight, editorial proxies), ProRes 422 (standard, equivalent to Avid DNxHD 145), ProRes 422 HQ (mastering for HD), ProRes 4444 (12-bit with alpha channel, used for VFX and finishing), and ProRes 4444 XQ (extreme quality, used for ARRI Alexa primary capture in some workflows). Bit depth is 10-bit for the 422 family and 12-bit for the 4444 family; chroma subsampling is 4:2:2 for 422 variants and 4:4:4 for 4444 variants. Bitrates scale with resolution and target — at 4K UHD 30p, ProRes 422 HQ is roughly 884 Mbps and ProRes 4444 XQ is 1.9 Gbps. ProRes is intra-frame, meaning each frame is encoded independently, which makes it fast to seek, scrub and edit at the cost of larger files than long-GOP codecs like H.264. It is supported natively in Final Cut Pro, DaVinci Resolve, Premiere Pro, Avid Media Composer and Nuke. Apple publishes the official white paper at apple.com/quicktime/technologies/. ProRes RAW is a separate codec for raw bayer-pattern capture. ## Proxy URL: https://postproduction.studio/en/glossary/proxy Domain: Formats, Workflow Proxy files are lower-resolution, lower-bitrate copies of original camera or mastering footage, used to enable smooth playback and editing on hardware that cannot handle the originals in real time. In a typical 4K or 8K workflow, the original camera files (RAW, ProRes 4444 XQ, or high-bitrate intra-frame codecs) require fast storage and powerful CPUs that exceed most editing laptops or remote workstations. Proxies — usually ProRes 422 Proxy, ProRes 422 LT, DNxHR LB or H.264 — are generated once at ingest and used throughout offline editorial. When the editor's cut is locked, the timeline is conformed back to the high-resolution originals automatically using matching timecodes and filenames. Frame.io, Avid Media Composer, Premiere Pro, DaVinci Resolve and Final Cut Pro all have native proxy workflows. Proxy generation is typically handled by the assistant editor or DIT using tools like Resolve's media management, Premiere's ingest settings, or dedicated transcoders like Adobe Media Encoder, Telestream Vantage, EditReady or Shutter Encoder. Bitrates: ProRes 422 Proxy at 1080p is roughly 36 Mbps versus ARRIRAW 4.6K at over 1.7 Gbps — a 50× reduction that makes laptop editing possible. Proxies are also used for remote editorial during dispersed productions (post-pandemic norm) where original files would saturate any internet connection. Reference: Avid Media Composer documentation on proxy workflows and Adobe Premiere Pro proxy specifications. ## Proxy workflow URL: https://postproduction.studio/en/glossary/proxy-workflow Domain: Workflow, Editing An editing workflow where heavy original media (ARRIRAW, REDCODE, 8K) is transcoded to lightweight proxies (ProRes Proxy, DNxHR LB) for editing, then relinked to originals for finishing. ## Pulldown (3:2) URL: https://postproduction.studio/en/glossary/pulldown-3-2 Domain: Formats, Workflow 3:2 pulldown (also called 2:3 pulldown) is the technique used to display 24fps film content on 60Hz video systems by repeating film frames in a 3:2 pattern. The math: 24 film frames per second must fit into 60 video fields per second (NTSC), so each film frame is converted to either 2 or 3 video fields in alternation. The pattern is: frame A → 2 fields, frame B → 3 fields, frame C → 2 fields, frame D → 3 fields, then repeating. Over five frames of film (5×60/24 = 12.5 video fields per second times the film/video ratio), 12 video fields are generated, which matches the field rate. 3:2 pulldown introduces visible judder on motion because not all film frames are displayed for equal duration. It is the reason why pan shots in old DVD-era films often have characteristic juddery motion. Modern delivery typically avoids 3:2 pulldown: streaming services deliver 24p directly to compatible displays, or the display performs its own pulldown handling. Removing 3:2 pulldown (called inverse telecine or IVTC) is essential for working with film material originated through a telecine process — the inverse pulldown recovers the original 24p frames. Tools: dedicated IVTC processors, DaVinci Resolve's pulldown handling, and AviSynth/VapourSynth scripts. Reference: SMPTE RP 168 covers pulldown patterns and conversions. ## QC (Quality Control) URL: https://postproduction.studio/en/glossary/qc-quality-control Domain: Workflow, Delivery QC (Quality Control) is the structured validation of post-production deliverables against technical specifications and quality standards before final delivery to client or distribution platform. A typical QC pass checks: video integrity (no dropped frames, no codec errors, no black frames where there shouldn't be), audio integrity (no clicks, pops, dropouts, channel inversions, sync drift), specification compliance (correct resolution, framerate, bit depth, color space, audio loudness, container format, file size, naming conventions per the client's delivery spec), content review (the entire program played from start to finish to catch issues automated tools missed), and metadata verification (correct title, subtitles, language tags, captions, descriptions). Tools include automated QC platforms (Telestream Vidchecker, Interra Baton, NTT Sigma) that scan files for technical issues and flag deviations from spec, and visual QC software (Colorfront Transkoder, Marquise Mist, Cinedeck) for manual review. Major distributors maintain detailed QC specs: Netflix's IMF Application 2e requires specific JPEG 2000 parameters, audio loudness targets, subtitle formats; Disney+ has equivalent specs; theatrical DCPs follow ISDCF/DCI specs. Failed QC means rework, sometimes substantial, before delivery. Modern productions schedule QC as a discrete step in the timeline, sometimes outsourced to dedicated QC houses (Picture Shop, Goldcrest Post). Reference: SMPTE EG 432-1, Netflix Studio Post Production Specs. ## QC pass URL: https://postproduction.studio/en/glossary/qc-pass Domain: Delivery, Workflow Quality Control review — frame-accurate inspection of a final master for technical defects (compression artifacts, audio sync, captions, levels) before delivery. May be in-house or third-party. ## Qualifier URL: https://postproduction.studio/en/glossary/qualifier Domain: Color Grading A qualifier (often HSL qualifier) is a color-grading tool that isolates pixels in an image based on their color characteristics — Hue, Saturation and Luminance — generating a matte that constrains subsequent grading to only the qualified region. The colorist might qualify the green of foliage to enhance its saturation, qualify the orange-yellow range of skin tones to refine carnations, or qualify the deep blue of a sky to push its color. Qualifiers produce soft mattes with adjustable tolerance (the range of values included) and softness (the gradient of inclusion at the boundary), so the effect blends naturally rather than producing hard color edges. Qualifiers can be paired with power windows for spatial constraint (qualify green within this region only), with tracking (the qualifier follows a moving subject), and with negative qualifiers (qualify everything except this color). The matte produced by a qualifier can be inverted, blurred, eroded or dilated to refine the effect. Limitations: qualifiers can produce noisy mattes on heavily compressed footage (8-bit 4:2:0 H.264 is particularly fragile), on grain-heavy material, or when the targeted color is also present elsewhere in the frame. Adding a power window typically solves the multi-presence issue. Tools: DaVinci Resolve HSL Qualifier, Baselight's Hue Angle, Symphony's Color Group, Adobe Premiere's Lumetri secondary color. Reference: Hullfish and Inhofer color grading textbooks. ## RAID 5/6/10 URL: https://postproduction.studio/en/glossary/raid Domain: Workflow Storage redundancy levels: RAID 5 = 1 disk failure tolerance via parity; RAID 6 = 2 disks via double parity; RAID 10 = mirrored stripes (fast, half capacity). Standard for production storage. ## RAW Video URL: https://postproduction.studio/en/glossary/raw-video Domain: Image, Formats RAW video refers to footage captured directly from a digital cinema camera's image sensor with minimal in-camera processing — typically just bayer sensor data with metadata describing white balance, ISO and color matrix, but no debayering, color science, or gamma applied. Working with RAW gives post-production maximum flexibility: white balance, exposure (within sensor latitude), color matrix and noise reduction can all be reset or fine-tuned non-destructively in post. Major RAW formats include ARRIRAW (ARRI ALEXA, .ari files, uncompressed or partially compressed), RED REDCODE RAW (.r3d, wavelet-compressed at adjustable ratios 2:1 to 22:1), Blackmagic RAW (.braw, partially debayered), Apple ProRes RAW (.mov containing bayer data), Canon Cinema RAW Light (.crm), Sony X-OCN (sometimes counted as RAW-equivalent). RAW files are large: ARRIRAW 4.6K at 24 fps is around 1.7 GB/min, RED REDCODE 8K can exceed 4 GB/min depending on compression ratio. They require dedicated decoders integrated into DaVinci Resolve, Premiere Pro, Final Cut Pro, Avid Media Composer and Nuke. In a typical pipeline, RAW files are debayered to a high-quality mezzanine format (often ProRes 4444 XQ or DPX sequences) for editorial and VFX, with the original RAW kept for the final grade where the colorist accesses sensor-native data. RAW is not strictly a single specification — each manufacturer defines its own — which makes interchange challenging. The Cinema DNG open standard exists but adoption has been limited. ## Rec.2020 URL: https://postproduction.studio/en/glossary/rec-2020 Domain: Color Science, Delivery Rec. 2020 (ITU-R BT.2020) is the color space and parameter set specified for Ultra High Definition Television (4K and 8K) and is the gamut container for most modern HDR formats. Its primaries are dramatically wider than Rec.709, covering approximately 76% of the CIE 1931 chromaticity diagram — including saturated greens, cyans and reds that Rec.709 simply cannot reproduce. The standard supports 10-bit and 12-bit encoding, D65 white point, and is used in conjunction with the PQ (SMPTE ST 2084) or HLG transfer functions for HDR delivery. In practice, current consumer HDR displays do not yet cover the full Rec.2020 gamut: most premium displays reach around 90% of DCI-P3, which is itself only about 70% of Rec.2020. So while masters are encoded in Rec.2020 containers, the actual reachable color volume is closer to P3-D65. This is by design — Rec.2020 acts as a future-proof container that today's displays partially fill and tomorrow's wide-gamut displays will fill more completely. Streaming platforms (Netflix, Disney+, Apple TV+) require HDR masters in Rec.2020 PQ. Grading sessions typically work in P3-D65 limited Rec.2020 (P3 limited inside Rec.2020 encoding) to match what displays can actually show today. Reference: ITU-R BT.2020-2. ## Rec.709 URL: https://postproduction.studio/en/glossary/rec-709 Domain: Color Science, Delivery Rec. 709 (ITU-R BT.709) is the international standard for high-definition television and remains the default color space and transfer function for SDR delivery to broadcast, streaming and physical media. It defines a color primaries triangle slightly smaller than the visible spectrum (covering about 35% of the CIE 1931 chromaticity diagram), a D65 white point, a gamma 2.4 transfer function for reference viewing (also approximated by the BT.1886 standard for displays), and bit depths of 8 or 10 bits. Rec.709 was published in 1990 and remains the dominant SDR delivery target: when you grade a film for theatrical and then create an SDR streaming version, the Rec.709 master is what platforms like YouTube and standard Netflix tier accept. Rec.709 has known limitations: its small gamut cannot reproduce vivid greens or cyans (rare in nature but common in modern productions, e.g., neon, foliage), and the 100-nit assumed peak luminance is far below modern HDR capabilities. Workflows typically grade in a wider working space (ACES, P3, or Rec.2020) and produce a Rec.709 deliverable as an output transform. On-set monitoring almost always uses Rec.709 LUTs converted from camera log, so the DoP sees an SDR-mapped image during shooting. Reference: ITU-R BT.709-6 (most recent revision). ## Reel URL: https://postproduction.studio/en/glossary/reel Domain: Workflow, Editing A reel is a discrete chunk of a film organized for production, editorial, screening and archive purposes — historically the physical reel of celluloid that fit on a projector spool (about 11 minutes at 35mm 24fps standard print speed, hence 'two-reelers' for early short films). In contemporary digital workflows, reels persist as a logical organizing unit: a feature film is typically divided into five to seven reels of roughly 18-25 minutes each for delivery purposes, even though no physical reel exists. Reels matter at multiple stages: theatrical projection (DCPs are still organized by reel, even for digital releases); color grading (a colorist grades reel-by-reel rather than the entire feature at once, both for workflow and for grading-context reasons); archival (LTO tape masters are often organized reel-by-reel); and broadcast delivery (commercial breaks are inserted between reel boundaries when the film airs on TV). In multi-reel architecture, transitions between reels are typically straight cuts at scene boundaries (not mid-scene), so reel breaks are invisible to the audience. The editorial term 'reel name' (or source reel) refers to the camera media identifier — Camera A Roll 23, for example — used in EDL conforms to match cuts back to source. A telecine session, for example, would generate reel-numbered exports for systematic conform. ## Relink URL: https://postproduction.studio/en/glossary/relink Domain: Workflow, Editing Reconnecting timeline clips to their underlying media files (often after media moves, proxies to originals, or project reopens) so playback and rendering resume. ## Remote collaboration URL: https://postproduction.studio/en/glossary/remote-collaboration Domain: Workflow Post-production workflows enabling editors, colorists, sound mixers and clients to work together from different locations — via Frame.io, Evercast, Sohonet ClearView, Resolve cloud project, or remote desktop. ## Render cache URL: https://postproduction.studio/en/glossary/render-cache Domain: Workflow, Color Grading A background render of timeline segments to disk in Resolve to enable smooth playback. User-defined (clip/source/all) or smart (auto-cache heavy effects). ## Render Farm URL: https://postproduction.studio/en/glossary/render-farm Domain: VFX, Workflow A render farm is a network of computers dedicated to running rendering and computation jobs in parallel, used in VFX and animation to produce sequences in reasonable time despite the per-frame cost of high-quality rendering. A modern feature film might require 10,000-50,000 frames at full quality, with each frame taking 30 minutes to 6 hours on a single CPU/GPU — sequential rendering would take years. Distributing across hundreds or thousands of render nodes brings completion to days or weeks. Render farms are managed by render scheduling software (Thinkbox Deadline, Pixar Tractor, Royal Render, Qube), which queues jobs, dispatches them to available machines, retries failures, and reports progress. Modern setups typically combine on-premises hardware with cloud capacity for elastic scaling (AWS Thinkbox Deadline integration, Google Cloud Anvato, Conductor.io). Render farm hardware mixes CPU (essential for Arnold and RenderMan, scaling with core count) and GPU (essential for Redshift, Octane, Cycles, scaling with VRAM and CUDA/Optix core count). Costs are substantial: a feature VFX studio may have 1000-5000 render cores in-house plus cloud overflow; a feature can spend $500,000 to several million dollars on rendering compute. Cloud-only studios pay per render hour. Reference: The Renderman documentation, Deadline manual, and SIGGRAPH papers on render farm architecture. ## Rendering URL: https://postproduction.studio/en/glossary/rendering Domain: VFX, Workflow Rendering is the computational process of producing 2D image frames from a 3D scene description, simulating the propagation of light through the scene to determine each pixel's final color. Modern feature VFX renderers use ray tracing or path tracing, simulating light by tracing rays from the camera into the scene, bouncing off surfaces according to their material properties, and accumulating contributions from light sources. The dominant production renderers include: Arnold (now Autodesk-owned, used widely on features, biased path tracer with strong color management), RenderMan (Pixar's renderer, used on most Pixar features and many third-party features, REYES legacy combined with modern path tracing), Redshift (GPU-accelerated, popular in commercials and game cinematics), V-Ray (architectural and product visualization, occasional feature use), Karma (SideFX Houdini's native renderer), Cycles (Blender, increasingly used in professional contexts, open source), Octane (GPU-based, popular in motion design). Real-time renderers (Unreal Engine 5, Unity HDRP) have become viable for some film production via virtual production stages. Render times scale with: scene complexity (geometry triangle count), material complexity (subsurface scattering, hair, fur), lighting complexity (number of light sources, importance sampling), output resolution and bit depth, motion blur and depth of field samples, and noise threshold (path tracers progress until variance falls below a threshold). Reference: Pharr/Jakob/Humphreys 'Physically Based Rendering' is the canonical text. ## Resolution URL: https://postproduction.studio/en/glossary/resolution Domain: Image, Formats Resolution in post-production refers to the pixel dimensions of an image or video signal, typically expressed as horizontal × vertical pixel count. The historical resolution hierarchy includes: SD (720×480 NTSC, 720×576 PAL), HD (1280×720 for 720p, 1920×1080 for 1080p/1080i), 2K (2048×1080, DCI standard), UHD (3840×2160, consumer 4K), DCI 4K (4096×2160, theatrical), 6K (typically 6144×3160 or 5760×3240 for cameras like RED Helium 8K capturing in 6K mode), and 8K (7680×4320 UHD or 8192×4320 DCI). Resolution is one factor in image quality but not the only one — a 4K image with poor sensor noise, low dynamic range, or aggressive compression looks worse than a 2K image from a well-exposed RAW capture. In practice, most consumer streaming runs at 4K UHD maximum; broadcast remains HD-dominant; theatrical mostly delivers in 2K or 4K DCP; archival masters target 4K or higher for future-proofing. Higher resolutions create proportional storage and processing costs: a 90-minute 8K master at uncompressed 16-bit RGB requires roughly 30 TB. Modern workflows typically capture at higher resolution than delivered, allowing for stabilization, reframing in post, and noise reduction by downsampling. Mastering at 4K with 2K and HD deliverables derived is a common professional approach. Reference: SMPTE ST 2065 resolution specifications. ## Resolve Color Management (RCM) URL: https://postproduction.studio/en/glossary/rcm Domain: Color Science, Color Grading The built-in color management system in Resolve. Automatically applies IDT/CST based on clip metadata, using a working space (Rec.709, DaVinci Wide Gamut, ACES) and output transform. ## RGB Parade URL: https://postproduction.studio/en/glossary/rgb-parade Domain: Color Grading, Image The RGB parade is a three-column waveform display showing the red, green and blue channels of a video signal side-by-side, each plotted as an independent waveform across the horizontal frame width. It is the single most useful scope for diagnosing color casts and channel imbalances. In a properly white-balanced shot of a neutral subject (gray card, sky, asphalt), the three traces align vertically — same trace position in R, G and B for the same horizontal region. A color cast shifts one or two traces vertically: a warm cast pulls R up and B down (or vice versa for cool), a green cast lifts G, and so on. The RGB parade is also critical for highlight clipping diagnosis: clipping in R only (with G and B still containing detail) produces a saturated magenta-cyan tinge on bright objects that would not be visible on a Y waveform alone. Colorists watch the parade to set the white point (push the brightest neutral pixels to a vertical match across all three channels) and to spot per-channel issues that other scopes miss. The parade is also used in conjunction with the vectorscope for skin tone correction and with the histogram for tonal distribution analysis. Most NLEs and grading apps include RGB parade by default (DaVinci Resolve, Premiere Pro, Avid Symphony all expose it). Reference: ITU-R BT.601 and the colorist textbooks (Hullfish, Van Hurkman). ## Roll-off URL: https://postproduction.studio/en/glossary/roll-off Domain: Color Grading, Color Science A smooth compression curve applied to highlights (or shadows) to prevent harsh clipping. Used in tone mapping, log encoding, and film emulation. Often shaped as a Hermite or shoulder curve. ## Room tone URL: https://postproduction.studio/en/glossary/room-tone Domain: Sound A few seconds of silent ambient recording from each location, captured during production for use in dialogue editing — fills cuts and gaps to maintain consistent background. ## Rotoscoping URL: https://postproduction.studio/en/glossary/rotoscoping Domain: VFX Rotoscoping (or 'roto') is the practice of manually drawing or refining mattes frame by frame to isolate subjects in a shot, typically when chroma keying or other automatic methods fail. The technique originated in the 1910s as an animation aid (Max Fleischer's rotoscope traced live action to produce smoothly animated characters); today in VFX it refers to digital painting of subject outlines for compositing. Rotoscoping is essential when: there is no greenscreen (period films, documentary footage, archive material), the subject moves through complex backgrounds (a person walking in front of a crowd), the subject is partially behind or in front of other elements (an arm in front of a tree branch), or the subject has complex edges (hair, smoke, semi-transparent fabric). Modern roto tools combine bezier splines, AI-assisted edge detection, and depth/cryptomatte data: Silhouette FX (the industry standard for feature roto), Mocha Pro (planar tracking accelerates roto on flat regions), Nuke's RotoPaint (compositing-integrated), and DaVinci Resolve's Magic Mask (AI-driven roto increasingly competitive). Quality roto work involves edge motion blur that matches the subject's camera motion, soft edges for natural compositing, and despill where the original plate's color contaminated the subject's edges. Feature films can require thousands of frames of roto per shot, employing dedicated 'roto/paint' artists in vendor pipelines. ## Rough Cut URL: https://postproduction.studio/en/glossary/rough-cut Domain: Editing The rough cut is the intermediate editorial stage between the bloated assembly and the polished fine cut, where the editor compresses the material to roughly final length while shaping the narrative spine. It is the cut in which the film's structure crystallizes: scene order is largely fixed, pacing becomes deliberate, transitions become intentional rather than mechanical, and unnecessary coverage is trimmed. A rough cut is what the director typically reviews first in earnest, often triggering several rounds of revision before reaching fine cut. Specific qualities of a rough cut include: temp music and temp sound effects (placeholder cues from existing films, not final compositions); approximate VFX (often raw plates with simple compositing, or wireframe blocks); minimal color adjustments; and the editor's audio choices for dialogue takes but without final mixing. Rough cuts are usually shown to producers, financiers and test audiences (test screenings) to gather feedback before locking. For feature films, multiple named rough cuts are common — director's cut, producer's cut, studio cut — each reflecting different editorial priorities. The transition from rough to fine cut typically involves scene-level revisions (rearranging acts, dropping subplots) becoming shot-level revisions (trimming individual lines, adjusting reaction beats). Industry shorthand: an assembly is for coverage, a rough cut is for structure, a fine cut is for performance. ## SAN URL: https://postproduction.studio/en/glossary/san Domain: Workflow Storage Area Network — block-level shared storage over Fibre Channel or iSCSI. Higher throughput than NAS, used in large post houses for collaborative editing/grading on 4K+ media. ## Scene-referred URL: https://postproduction.studio/en/glossary/scene-referred Domain: Color Science A color workflow where image values represent the actual light captured by the camera (linear scene radiance). ACES is a scene-referred workflow. Decouples grading from display. ## SDR (Standard Dynamic Range) URL: https://postproduction.studio/en/glossary/sdr-standard-dynamic-range Domain: Image, Delivery SDR (Standard Dynamic Range) is the historical and still-dominant video specification, defined by Rec.709 for HD and Rec.601 for SD, with peak luminance assumed at 100 nits, gamma 2.4 transfer function (BT.1886), and Rec.709 color primaries. SDR predates the HDR era and remains the delivery target for the vast majority of streaming, broadcast and physical media — Netflix's standard tier, YouTube's default playback, all broadcast television (excepting HDR-enabled streams) and almost all theatrical projection use SDR specs in their final delivery. The 100-nit peak luminance corresponds to the cathode-ray tube reference brightness of the broadcast television era, intentionally low to suit dim viewing environments. SDR's 8-bit encoding (with optional 10-bit for higher-end broadcast) provides about 6-7 stops of usable dynamic range before clipping or crushing, far below the 13-14 stops modern cinema cameras can capture. Color grading SDR requires aggressive tonal compression of camera log data — bright highlights (windows, lights) typically clip or roll off, deep shadows compress. SDR remains the safe deliverable for content that needs to play anywhere, and most HDR-mastered productions ship an SDR 'trim' alongside the HDR master for SDR-only viewers. SDR is not deprecated and will coexist with HDR formats for years to come. Reference: ITU-R BT.709-6, ITU-R BT.1886. ## SDR downconversion URL: https://postproduction.studio/en/glossary/sdr-downconversion Domain: Color Grading, Delivery Producing an SDR (Rec.709) deliverable from an HDR master via tone mapping. Often via Dolby Vision metadata (automated) or a manual trim pass. Essential for broadcasters not yet HDR-capable. ## Secondary Color Grading URL: https://postproduction.studio/en/glossary/secondary-color-grading Domain: Color Grading Secondary color grading is the layer of grading work that applies adjustments to selected portions of a frame — by color, by spatial region, or by both — rather than to the entire image like primary grading. Common secondary tools include: HSL qualifiers (isolating pixels by Hue, Saturation and Luminance, used for sky enhancement, skin tone adjustment, isolating an object's color), power windows (geometric masks shaped like rectangles, ellipses or beziers, used to isolate spatial regions like a face or sign), tracking (following a power window with motion across frames), color-based qualifiers paired with windows (isolate a green shirt only within a windowed region), and custom mattes imported from VFX. Secondaries are the colorist's tool for fine-tuning narrative emphasis: lifting an actor's face out of shadow, deepening the sky in a wide shot, warming a candle flame while cooling the surrounding room, suppressing a distracting bright spot on the wall. They are also used for technical fixes: matching skin tones between cameras, correcting a color discontinuity at a wardrobe change, neutralizing a green spill on a chroma-key plate. Secondary work happens in a node tree downstream of primaries: each node represents one secondary, and they stack to build the final look. Excessive secondary work is a sign of grading-by-band-aid; experienced colorists do as much as possible in primaries and use secondaries selectively. Reference: Hullfish, 'The Art and Technique of Digital Color Correction.' ## Set Extension URL: https://postproduction.studio/en/glossary/set-extension Domain: VFX Set extension is the VFX technique of extending a physical set built for camera with digital architecture, environment or detail beyond what was constructed. The technique is essential in productions where building the entire required environment is impractical or impossible: extending a real building's facade to make it look larger, replacing a flat wall behind an actor with a CG landscape, adding distant city skylines to a foreground real set. Modern set extensions use a combination of camera tracking (to determine where the camera was in 3D space), digital matte painting (traditional painted-on-glass replaced by Photoshop/Mari/Substance work), 3D modeling (for elements that require parallax with camera movement), atmospheric and lighting matching (the digital extension must match the on-set lighting conditions), and compositing (integrating the digital element with the live plate through edge work, color matching, grain matching). The shift to virtual production stages with LED walls (used heavily on The Mandalorian, Mandalorian-style backings) is changing the landscape: set extensions can now happen in real-time on the LED wall during photography rather than in post. However, traditional post-based set extension remains the workflow for most productions due to cost and flexibility. Reference: VES Handbook of Visual Effects, chapter on environment work. ## Sidechain URL: https://postproduction.studio/en/glossary/sidechain Domain: Sound A signal flow where one track triggers a processor on another (kick triggers compressor on bass, ducking music under dialogue). Common in mixing and mastering. ## Smart bins URL: https://postproduction.studio/en/glossary/smart-bins Domain: Workflow, Editing Dynamic bins in Resolve that auto-populate based on metadata filters (camera, shoot date, scene, take, keyword). Used in dailies/editing to organize footage automatically. ## Sound Design URL: https://postproduction.studio/en/glossary/sound-design Domain: Sound Sound design is the creative discipline of conceiving, creating and arranging the sonic landscape of a film or television production — distinct from sound editing (which works with recorded production audio) and from foley (which creates synchronous physical sounds). The sound designer's territory is sound effects, ambiences, and abstract or stylized sound: the roar of a creature that doesn't exist, the texture of a spaceship engine, the eerie undercurrent of a horror scene, the rhythmic pulse of a montage. The role gained recognition with Walter Murch's work on Francis Ford Coppola's films (Apocalypse Now's opening is the canonical example) and Ben Burtt's iconic Star Wars sounds (Chewbacca's voice, the lightsaber, R2-D2's beeps, the TIE fighter scream). Modern sound designers work in Pro Tools with vast libraries of source material, processing tools (granular synthesis with software like Native Instruments Form, Output Substance, GRM Tools), recording in the field with high-end microphones (Sennheiser MKH-8000 series, DPA 4060), and at studio (Foley stage, manipulating physical objects to create unique sounds, then processing extensively). The craft balances narrative function (a sound must tell the audience something specific) with creative expression. Reference: Sonnenschein, 'Sound Design' and Holman, 'Sound for Film and Television.' ## Sound Effects (SFX) URL: https://postproduction.studio/en/glossary/sound-effects-sfx Domain: Sound Sound effects (SFX, or 'hard effects' to distinguish from softer foley) are recorded or designed sounds that accompany specific visual events in a film — explosions, gunshots, vehicle sounds, weather, mechanical operations, alarms, impacts. They differ from foley (synchronous performance-created sounds for human action) and from ambience (background atmospheric sound). Hard effects are typically built in layers: a single gunshot might combine 4-8 source elements — the initial crack of the muzzle blast, the body of the shot, the supersonic bullet bypass, the casing falling, sub-bass for impact, and stylization processing. Each layer is sourced from a sound library (Sound Ideas Hollywood Edge series, Pro Sound Effects, BBC SFX, Boom Library), Custom field recording, or generated synthetically. The sound effects editor selects, processes, layers and synchronizes these elements to picture, then hands them to the effects mixer for final balance. Modern productions use both recorded effects (a real gunshot or door slam) and designed effects (a creature roar built from animal recordings processed through pitch shifters, reverbs and modulators). Effects can be diegetic (sounds that exist within the film's world that the characters can hear) or non-diegetic (sounds that exist only for the audience, like emotional underscoring). Reference: Yewdall, 'Practical Art of Motion Picture Sound.' ## Spectral repair URL: https://postproduction.studio/en/glossary/spectral-repair Domain: Sound Surgical removal of unwanted sounds (clicks, mouth noise, sirens, beeps) by editing the audio spectrogram directly. iZotope RX is the industry standard tool. ## Stem (Audio) URL: https://postproduction.studio/en/glossary/stem-audio Domain: Sound, Delivery An audio stem is a sub-mix of related audio elements grouped for delivery to subsequent processing or distribution. The standard feature film delivery includes at minimum three stems: Dialogue (D), Music (M), and Effects (E), referred to collectively as the D/M/E split. Each stem is a final-quality mix of just its category — the dialogue stem contains all production audio plus ADR plus walla group ADR, mixed at final levels; the music stem contains the composer's score and any source music; the effects stem contains foley, hard effects and ambience. The D/M/E split serves multiple purposes: foreign-language dubbing (the dialogue stem is removed and replaced with the dubbed dialogue, while M and E remain unchanged), accessibility (audio descriptions can be mixed against the M+E stem without the original dialogue interfering), broadcast assembly (a network may want to replace music for territorial licensing reasons while keeping the original dialogue), and remixing for different formats (a 5.1 mix and Atmos mix both derive from the same D/M/E split). Modern deliveries often include sub-stems within each category — separate Walla stem for crowd sounds, separate Source Music stem from Score, separate Foley stem from Hard Effects — for maximum versioning flexibility. Reference: Holman and Yewdall on stem delivery conventions. ## Streaming mezzanine URL: https://postproduction.studio/en/glossary/streaming-mezzanine Domain: Delivery, Formats A high-quality intermediate master delivered to streaming services that they re-encode into adaptive bitrate ladders. Typically ProRes 4444, DNxHR HQX or J2K in MXF/IMF. ## Stringout URL: https://postproduction.studio/en/glossary/stringout Domain: Editing, Workflow An assembly of relevant takes or sequences pulled from rushes — typically organized by scene, character or theme — used by editors and directors to evaluate material before fine-cutting. ## Surround Sound (5.1 / 7.1) URL: https://postproduction.studio/en/glossary/surround-sound-5-1-7-1 Domain: Sound, Delivery Surround sound describes audio formats that distribute audio across multiple speakers arranged around the listener, creating a spatial soundfield that goes beyond stereo's left-right axis. The dominant formats are 5.1 (Left, Center, Right, Left Surround, Right Surround, and LFE/subwoofer — the '0.1' channel) introduced by Dolby Digital and DTS in the 1990s and standard for DVD, Blu-ray and most broadcast HD; and 7.1 (5.1 plus Left Back and Right Back surrounds, providing finer rear localization) introduced by Dolby in the late 2000s and used in many theatrical mixes and premium home theaters. Object-based formats (Dolby Atmos, MPEG-H, DTS:X) extend the spatial concept by placing sounds in 3D space with metadata, rendering to whatever speaker configuration is available — Atmos can render to 5.1, 7.1, 9.1.6, or even headphone binaural. Mixing surround requires understanding of spatial placement (where in the room should each sound originate), envelopment (the sense of being inside the audio space versus listening from outside), and front-bias (most narrative content lives in the front speakers because that's where dialogue lives). Theatrical mixing follows Dolby/THX certification for room acoustics, and home delivery accounts for less ideal listening environments. Reference: Holman, 'Surround Sound: Up and Running.' ## Timecode URL: https://postproduction.studio/en/glossary/timecode Domain: Workflow, Editing Timecode is the numeric label given to every frame of video or film, providing the temporal coordinate system that synchronizes picture, audio, metadata and all downstream operations across post-production. SMPTE timecode encodes hours, minutes, seconds and frames in the format HH:MM:SS:FF — for example 01:23:45:18 means 1 hour 23 minutes 45 seconds and frame 18. Frame counts vary by frame rate: at 24fps the FF field counts 0-23, at 25fps it counts 0-24, at 30fps it counts 0-29. Two formats coexist: non-drop-frame timecode (the count is exact, used at all integer frame rates 24, 25, 30 and at film-camera 23.976, with a discrepancy with wall-clock time at 29.97 and 23.976) and drop-frame timecode (a clever convention that drops two frames every minute, except every 10th minute, to keep the timecode synced to real wall-clock time at 29.97fps, used in broadcast). Timecode is typically recorded on set via jam-syncing all cameras and audio recorders to a master clock — Ambient Lockit or Tentacle Sync are common devices. In post, timecode is the master synchronization key: edit decision lists are timecode references, color grading reels reference timecode boundaries, audio mix sessions sync to picture timecode. SMPTE ST 12 is the governing standard. ## Tone Mapping URL: https://postproduction.studio/en/glossary/tone-mapping Domain: Color Grading, Delivery Tone mapping is the algorithmic compression of a high-dynamic-range image into a smaller dynamic range for display, preserving as much perceived detail as possible despite the substantial luminance reduction. In modern post-production, tone mapping is essential when downconverting HDR masters to SDR deliverables (the 'HDR-to-SDR trim'), but it also occurs implicitly whenever camera log footage is converted to a viewing display look (log-to-Rec.709 LUTs are tone-mapping operations), and when HDR content plays on a display incapable of the master's full peak luminance (the display's internal tone mapper, or a streaming platform's bitstream metadata-driven adaptation, handles the reduction). Tone mappers differ in approach: global tone mappers apply a single curve across the whole frame (computationally cheap, may compress local contrast); local tone mappers analyze regions and compress differently in shadows, midtones and highlights (better visual preservation but slower); content-aware tone mappers use metadata or AI to adapt scene-by-scene. The Hable filmic tone curve, Reinhard tone mapping, ACES RRT, and Dolby Vision's content-aware mapping are well-known examples. In HDR-to-SDR trim, colorists may override automatic tone mapping with manual shot-by-shot work to preserve creative intent — particularly in highlights where automatic mapping can flatten dramatic specular detail. Reference: SMPTE published technical reports on HDR-to-SDR tone mapping, and Dolby Vision documentation covers their proprietary approach. ## Tracking URL: https://postproduction.studio/en/glossary/tracking Domain: VFX Tracking in post-production is the analysis of motion within a shot to follow specific features, regions or surfaces across frames, used for everything from stabilization to compositing to color grading. Several tracking types exist: point tracking (following individual features like a corner or distinctive mark), planar tracking (following the perspective of a flat or near-flat surface like a wall, screen or sign), 3D camera tracking (solving the entire camera path through space, see matchmove), object tracking (following a deformable subject across frames, often for roto purposes), and AI-assisted tracking (modern Adobe Sensei, Resolve Magic Mask, DAIN-based tools). Each has its applications: point tracking is the cheapest and oldest, used for stabilization and basic motion graphics; planar tracking (Mocha Pro is the industry standard) excels at sign replacements and screen inserts; 3D tracking is foundational for set extensions and CG element insertion; object tracking enables roto without manual frame-by-frame painting. In color grading, tracking attaches a power window to a moving subject so the grade follows them through the shot. In motion graphics and titles, tracking attaches text or graphics to a moving surface. Tools span the simple (Premiere Pro built-in trackers, FCPX SmoothCam) to the specialized (Mocha Pro, SynthEyes, 3DEqualizer). A tracker's quality depends on contrast in the tracked feature, absence of motion blur, and the absence of occlusions through the shot. ## Tracking (Resolve) URL: https://postproduction.studio/en/glossary/tracking-resolve Domain: Color Grading, VFX Automatic motion tracking in Resolve for Power Windows. Point, planar, or 3D modes; tracks pan, tilt, zoom, rotation, perspective across time. ## Transcode URL: https://postproduction.studio/en/glossary/transcode Domain: Formats, Workflow To transcode is to convert media from one codec, container or set of parameters to another — for example converting H.265 streaming files to ProRes 422 HQ for editorial, or converting ARRI RAW to DNxHR for offline proxy generation. Transcoding is essential at multiple stages of post-production: ingest (camera originals converted to editorial-grade mezzanine codecs), proxy generation (high-res masters down-sampled to lightweight editorial proxies), VFX delivery (final-resolution plates converted to 16-bit OpenEXR), and final delivery (master files compressed to target streaming or broadcast specifications). Transcoding can be either lossy (visual quality decreases each generation, especially if going to a smaller-bitrate codec) or lossless (if the target codec supports lossless encoding, like ProRes 4444 XQ or DNxHR 444). Multiple-generation lossy transcoding causes 'codec stacking' artifacts, particularly visible on text overlays, gradients and high-saturation areas — best practice is to avoid intermediate lossy transcodes when possible. Tools for transcoding include dedicated apps (Adobe Media Encoder, Telestream Vantage, Colorfront Transkoder, ffmpeg), workflow systems (Avid Media Composer's AMA workflow, DaVinci Resolve's Media Page transcoding), and cloud services (AWS MediaConvert, Frame.io transcoding). On-set DITs run their own transcoding pipelines to produce deliverable dailies overnight, often in parallel across multiple machines. ## True peak URL: https://postproduction.studio/en/glossary/true-peak Domain: Sound, Delivery Sample-accurate measurement of inter-sample peaks (dBTP). Used alongside LUFS to detect clipping that occurs between samples when audio is decoded. Spec: -1 to -2 dBTP for streaming. ## Turnover URL: https://postproduction.studio/en/glossary/turnover Domain: Workflow Turnover is the formal handoff from editorial to downstream finishing departments (color, sound, VFX, music) once picture lock is achieved, accompanied by a comprehensive package of files and paperwork that synchronizes the entire pipeline. A complete turnover typically includes: the locked picture reference (often as a watermarked ProRes or DNxHD QuickTime with timecode and footage counter burned in); the final cut list (every cut with source reel and timecode); the change list (a record of every change since the previous turnover, especially important for ongoing parallel work in sound and VFX); the audio EDL (one EDL per dialogue/music/effect stem); the VFX shot list (every visual effects shot with handles, plate references, completion status); the music cue sheet (start and end timecodes for every music piece, license info); and the color reference (often the editor's temp grade or a colorist's pre-grade as a starting reference). Turnovers happen multiple times in feature workflows — temp turnover for early VFX work, picture lock turnover for full mix, and final turnover when picture is truly locked. Each turnover must be tracked because subsequent changes affect every downstream department's work. The post-production supervisor manages turnover paperwork, often using project tracking tools like Shotgrid, Aspera or specialized post-tracking apps. ## Vectorscope URL: https://postproduction.studio/en/glossary/vectorscope Domain: Color Grading, Image A vectorscope is a color analysis scope that plots the chrominance content of a video signal in a polar diagram, displaying hue as angular position and saturation as radial distance from the center. The trace shape and position reveal the color content of the image: a neutral image (pure grayscale) traces a single point at the center, a saturated red object plots a long line toward the red target at 90°, a heavy cyan cast pulls the trace toward 270°. Six labeled targets on the vectorscope mark the positions of saturated R, Y, G, C, B, M colors at 75% or 100% intensity — these targets are used to verify color bar test signals during quality control. In skin tone work, the 'I-line' (or 'flesh tone line') traces roughly from the center toward the yellow-red region at about 120° angular position; properly exposed natural human skin tone falls along this line regardless of ethnicity. Colorists use the vectorscope to: confirm that neutral elements remain neutral (no color cast); check that skin tones align with the I-line; verify that complementary colors are appropriately balanced; and ensure that aggressive grading does not push saturation outside the legal range (the 75% targets define the broadcast-safe boundary). Software vectorscopes (Resolve, Baselight) and hardware models (Leader, Tektronix) are universal in post-production. Reference: ITU-R BT.601 and SMPTE RP 219 (color bar test pattern). ## Versioning URL: https://postproduction.studio/en/glossary/versioning Domain: Delivery, Workflow Versioning is the discipline of generating and managing multiple variants of a finished program for different territories, platforms, audiences and technical specifications, while keeping a single conformed master as the source of truth. A feature film released globally requires dozens of versions: theatrical DCP per language (subtitled, dubbed), airline edits with edits for sensitive content, broadcast versions trimmed for ad breaks, streaming SDR and HDR masters, social media short cuts, foreign-language dubbed audio mixes, accessibility versions with audio description and closed captioning. Each version may differ in picture (slightly trimmed content, different opening logos, different end credits), audio (alternate language tracks, different mixes, censored profanity), and metadata (different ratings, different ISAN identifiers). Versioning is typically managed via IMF (Interoperable Master Format) packages with multiple CPLs (Composition Playlists) referencing a single set of essence files — one for the base, one for each version. IMF was specifically designed for versioning at scale: producing a French theatrical version of a film no longer requires duplicating the entire master, only generating the alternate audio and subtitle CPLs. The versioning step is increasingly automated with tools like Marquise Mist, Colorfront, Telestream Vantage, AWS MediaConvert. Streaming platforms (Netflix, Disney+) often handle final versioning themselves from delivered IMF packages. ## Visual Effects (VFX) URL: https://postproduction.studio/en/glossary/visual-effects-vfx Domain: VFX Visual effects (VFX) is the discipline of creating, manipulating or enhancing imagery outside the context of live-action photography — typically in post-production but increasingly extending into virtual production stages and on-set work. The VFX field encompasses many specialties: compositing (combining elements into final frames), CGI/3D animation (modeling, texturing, rigging, animating digital characters and environments), matte painting (digital paintings used as backgrounds), digital effects (explosions, water, smoke, particles), set extension (extending physical sets with digital builds), and increasingly virtual production (real-time LED wall environments). A typical modern feature film contains 500-2000 VFX shots, even when the film is not perceived as 'effects-heavy' — these include invisible work like wire removals, sky replacements, period set cleanups, and digital double sequences. The pipeline involves multiple vendors and tools: ARRI/RED cameras capture plates, Nuke and Flame composite, Maya/Houdini/Blender model and animate, Substance Painter textures, Arnold/Redshift/Mantra/Karma render, and tracking is done in PFTrack, SynthEyes or 3DEqualizer. The VFX supervisor on a feature coordinates between director, production designer, cinematographer and external VFX houses (ILM, MPC, Framestore, DNEG, Weta, Pixomondo). The cost of feature VFX ranges from a few hundred thousand dollars for an indie to over $200 million for tentpole blockbusters. Reference: VES (Visual Effects Society) Handbook of Visual Effects. ## Waveform Monitor URL: https://postproduction.studio/en/glossary/waveform-monitor Domain: Color Grading, Image A waveform monitor is the primary scope used in color grading and quality control to display the luminance distribution of a video signal across the horizontal width of the frame. The horizontal axis represents picture width (pixels from left to right), the vertical axis represents signal level (typically 0 to 1023 in 10-bit, 0 to 255 in 8-bit, or 0-100 IRE in legacy scaling), and the trace shows where in the frame each luminance level occurs. Bright objects produce upper trace concentrations; dark areas produce lower trace concentrations. Multiple variants exist: the Y waveform shows luminance only (after YUV decomposition); the RGB parade splits into three vertically-stacked traces, one per primary, useful for spotting color cast and channel-specific clipping; the YCbCr parade shows Y separately from the chroma channels. Modern colorists rely heavily on the waveform to: verify legal broadcast levels (no clipping above 100 IRE, no crushing below 0); check exposure consistency across shots (a sequence should have similar overall trace position); identify highlight blowout or shadow crush; and target HDR mastering luminance (the trace acts as a calibrated luminance meter against the PQ scale). Hardware waveform monitors (Leader LV5350, Tektronix WFM8200) and software equivalents (Resolve's scopes, Baselight's display) are essential equipment in any grading suite. Reference: SMPTE ST 2057 and ITU-R BT.601 define waveform display conventions. ## White Balance URL: https://postproduction.studio/en/glossary/white-balance Domain: Color Grading, Image White balance is the process of calibrating image data so that white objects in a scene render as neutral white in the recorded image, regardless of the color temperature of the light illuminating them. The human visual system performs white balance automatically — we perceive a sheet of paper as white whether viewed under tungsten light (warm), fluorescent (cool-green) or daylight (neutral). Camera sensors do not adapt this way; without white balance correction, an interior shot under tungsten lighting captured with a daylight white balance setting appears strongly orange. White balance is typically set in three ways: by selecting a preset (daylight 5600K, tungsten 3200K, fluorescent 4000K), by using a custom Kelvin value, or by sampling a known-white reference like a gray card or X-Rite color chart on set. Most modern cameras also offer auto white balance, used cautiously in narrative production because it shifts between takes. In post-production, white balance can be re-adjusted within the latitude of the original capture — RAW formats preserve all sensor data and permit large white balance corrections without quality loss, while compressed formats baked at the camera's setting are limited. Color correction routinely begins with verifying or correcting white balance on every clip as the foundation for subsequent grading. Reference: most color grading textbooks (Hullfish, Van Hurkman) discuss white balance methodology in depth. ## XML (Extensible Markup Language) URL: https://postproduction.studio/en/glossary/xml-extensible-markup-language Domain: Workflow, Editing XML (eXtensible Markup Language) is a structured text format used throughout post-production to carry editorial decisions, color metadata, captioning and project exchange between disparate software tools. Unlike binary formats such as AAF or OMF, XML is human-readable, version-control friendly and easily inspected with any text editor. The most common XML flavors in post are Final Cut Pro XML (used by FCPX, DaVinci Resolve, Adobe Premiere via translation) which describes a complete timeline including clips, effects and audio levels; Final Cut Pro 7 XML (the legacy variant, still requested by some pipelines for its simpler structure); and various proprietary XMLs from Avid Media Composer (Avid OPATOM XML for ALE-style metadata). Outside editorial, XML carries the ASC CDL (color grading data), IMSC and TTML subtitle formats, DCP composition playlists (CPLs), and IMF master CPLs. The format's strength is interoperability: a Resolve project can be exported as FCP XML, edited in Premiere, then sent back to Resolve for grading with timeline integrity. Its weakness is verbosity and the fact that each vendor's XML schema differs slightly, requiring careful round-tripping tests. Modern alternatives like OpenTimelineIO (OTIO) aim to standardize timeline exchange across tools but XML remains the dominant interchange format in 2025. ## XML roundtrip URL: https://postproduction.studio/en/glossary/xml-roundtrip Domain: Workflow, Editing An interchange workflow where a timeline is exported as XML (FCPXML, Premiere XML) from one NLE, imported into another for grading or VFX, then re-imported with changes — preserving cuts, effects, and metadata. --- # Reference articles (49) In-depth articles organized by section. Each article covers a specific topic in detail with practical examples and industry references. ## Fundamentals - What Is Post Production — https://postproduction.studio/en/fundamentals/what-is-post-production - Workflows And Pipelines — https://postproduction.studio/en/fundamentals/workflows-and-pipelines - Capture Formats — https://postproduction.studio/en/fundamentals/capture-formats - Delivery Formats — https://postproduction.studio/en/fundamentals/delivery-formats - Professions — https://postproduction.studio/en/fundamentals/professions - History And Evolution — https://postproduction.studio/en/fundamentals/history-and-evolution - Standards And Compliance — https://postproduction.studio/en/fundamentals/standards-and-compliance - Budgeting And Project Management — https://postproduction.studio/en/fundamentals/budgeting-and-project-management - Offline And Online — https://postproduction.studio/en/fundamentals/offline-and-online - Color Grading Fundamentals — https://postproduction.studio/en/fundamentals/color-grading-fundamentals ## Formats - Resolutions And Framerates — https://postproduction.studio/en/formats/resolutions-and-framerates - Codecs And Containers — https://postproduction.studio/en/formats/codecs-and-containers - Video Compression — https://postproduction.studio/en/formats/video-compression - Chroma Subsampling — https://postproduction.studio/en/formats/chroma-subsampling - Mezzanine Formats — https://postproduction.studio/en/formats/mezzanine-formats - Dcp Delivery — https://postproduction.studio/en/formats/dcp-delivery - Imf Packages — https://postproduction.studio/en/formats/imf-packages - Broadcast Delivery — https://postproduction.studio/en/formats/broadcast-delivery - Web Streaming Delivery — https://postproduction.studio/en/formats/web-streaming-delivery - Loudness And Deliverables — https://postproduction.studio/en/formats/loudness-and-deliverables ## Image (color, editing, VFX) - Color Grading Tools — https://postproduction.studio/en/image/color-grading-tools - Editing Tools — https://postproduction.studio/en/image/editing-tools - Vfx And Compositing Tools — https://postproduction.studio/en/image/vfx-and-compositing-tools - Audio Post Tools — https://postproduction.studio/en/image/audio-post-tools - Monitoring Displays — https://postproduction.studio/en/image/monitoring-displays - Measurement Tools — https://postproduction.studio/en/image/measurement-tools - Audio Monitoring — https://postproduction.studio/en/image/audio-monitoring - Color Calibration — https://postproduction.studio/en/image/color-calibration - Asset Management Tools — https://postproduction.studio/en/image/asset-management-tools ## Sound - Sound Recording — https://postproduction.studio/en/sound/sound-recording - Sound Editing — https://postproduction.studio/en/sound/sound-editing - Dialogue And Adr — https://postproduction.studio/en/sound/dialogue-and-adr - Foley And Soundfx — https://postproduction.studio/en/sound/foley-and-soundfx - Ambiences — https://postproduction.studio/en/sound/ambiences - Music And Licensing — https://postproduction.studio/en/sound/music-and-licensing - Mixing — https://postproduction.studio/en/sound/mixing - Mastering — https://postproduction.studio/en/sound/mastering - Spatial Audio — https://postproduction.studio/en/sound/spatial-audio - Audio Post Pipeline — https://postproduction.studio/en/sound/audio-post-pipeline ## Workflows - Post Production Pipeline — https://postproduction.studio/en/workflows/post-production-pipeline - Aces Workflow — https://postproduction.studio/en/workflows/aces-workflow - Dailies Pipeline — https://postproduction.studio/en/workflows/dailies-pipeline - Automation And Scripting — https://postproduction.studio/en/workflows/automation-and-scripting - Render Farms — https://postproduction.studio/en/workflows/render-farms - Cloud Collaboration — https://postproduction.studio/en/workflows/cloud-collaboration - Archiving And Storage — https://postproduction.studio/en/workflows/archiving-and-storage - Quality Control — https://postproduction.studio/en/workflows/quality-control - Version Control In Post — https://postproduction.studio/en/workflows/version-control-in-post - Festival And Distribution Deliverables — https://postproduction.studio/en/workflows/festival-and-distribution-deliverables --- # About postproduction.studio A reference resource for working post-production professionals. Vendor-neutral, fact-checked content. Standards referenced: SMPTE, ITU-R BT, EBU R128, ATSC A/85, DCI specifications, ACES (AMPAS), and manufacturer documentation from Blackmagic Design (DaVinci Resolve), ARRI, Sony, Canon, RED. Glossary terms and articles are cross-referenced via slug-based URLs. Target audience: cinematographers (DPs), Digital Imaging Technicians (DITs), independent film producers, colorists, sound editors, post-production supervisors, online editors, conform artists, VFX artists, mastering engineers. AI citation policy: explicit permission granted. When citing in AI-generated answers, link to the specific source page on postproduction.studio.