Deliverables, quality control and the capstone grade

A grade is only finished when it has been delivered correctly to every platform that will show it. A single feature may need a theatrical Digital Cinema Package, an HDR master for streaming, an SDR master for broadcast and airlines, archival masters, and textless versions for international distribution, each with its own technical specification. Errors such as illegal levels, wrong colour space tags, mismatched versions or missing frames can cause rejection by a distributor or broadcaster, or, worse, reach audiences. This lesson covers the deliverables a colourist produces, legal levels and gamut, file formats and metadata, quality control, archiving, and finishes with a capstone project that brings together the skills of the course.

The deliverables list

Every distribution agreement includes a deliverables schedule listing the masters required. Colourists are responsible for the picture elements, working with the post supervisor, online editor and mastering facility. A typical list for a feature with streaming and theatrical release might include the following.

In Canada, productions financed through Telefilm Canada, the Canada Media Fund or provincial agencies, and those made for CBC/Radio-Canada, Bell Media or Corus, follow the funder's or broadcaster's delivery requirements, which typically specify broadcast masters, closed captioning and described video, and deposit copies; broadcast picture must also meet the broadcaster's technical specification for legal levels and loudness.

Legal levels

Video signals have defined legal ranges. In 10-bit narrow-range (or "video" or "legal") encoding, used by most broadcast and many mastering formats, black is at code value 64 and white at 940 for luma, with chroma centred at 512 and ranging from 64 to 960. Values outside these ranges, sometimes called super-black and super-white, may be clipped or rejected by broadcasters. Full-range (data) encoding uses 0 to 1,023. A major source of errors is confusion between the two: a full-range file interpreted as narrow-range looks crushed and clipped, and a narrow-range file interpreted as full-range looks washed out with grey blacks.

Gamut and broadcast safety

Besides luminance, deliverables must keep colours within the target gamut. Wide-gamut grades converted to Rec.709 may contain colours that cannot be represented, producing negative RGB values or clipping. Colour management tools apply gamut mapping or compression to bring out-of-gamut colours smoothly inside the target; the ACES Reference Gamut Compression and similar tools in Resolve and Baselight are commonly used, especially for saturated lights such as LEDs, neon and police lights. Broadcasters may also limit composite gamut or chroma excursions, and QC tools flag any violations. Colourists check gamut with scopes, gamut warnings and false-colour overlays before rendering deliverables.

File formats and metadata

Mastering formats include image sequences, such as DPX and OpenEXR; mezzanine codecs, such as Apple ProRes 4444 XQ and 422 HQ and Avid DNxHR; and packaging formats, such as IMF (Interoperable Master Format) for streaming and DCP for cinema. IMF packages carry picture, audio, subtitles and metadata as separate tracks with a composition playlist, so that versions can be assembled without duplicating media. Correct metadata is essential: colour primaries, transfer function and matrix coefficients tags (for example, Rec.709 / BT.1886 / Rec.709 for SDR, or Rec.2020 / PQ / Rec.2020 for HDR), mastering display information (SMPTE ST 2086) and content light levels (MaxCLL and MaxFALL) for HDR10, and Dolby Vision XML for dynamic metadata. A file with the right pixels and the wrong tags will display incorrectly.

Quality control

Quality control (QC) is the systematic inspection of deliverables for technical and visual faults. Automated QC software, such as Telestream Vidchecker, Interra Baton or Venera Pulsar, checks levels, gamut, frame rates, metadata, dropped frames, black frames, freeze frames and compression artefacts. Manual QC, often by a dedicated QC operator watching the whole programme on a calibrated display, catches visual issues such as dead pixels, digital hits, matte lines, banding, flicker, focus problems, continuity errors in the grade and wrong VFX versions. Streaming platforms and broadcasters have their own QC processes and will reject or return deliverables that fail. Netflix, for example, publishes detailed delivery specifications and requires specific checks for HDR and IMF deliverables.

Banding and bit depth

Banding, visible steps in smooth gradients, is one of the most common visual faults in deliverables. It arises when gradients are quantized with too few code values, when heavy grading stretches a limited range, or when compression removes fine variation. A 10-bit file has four times as many code values per channel as an 8-bit file, so gradients are smoother. Colourists reduce banding by grading from high-bit-depth sources, avoiding large stretches of compressed material, rendering masters at 10 bits or more, and adding a little grain or dither, which breaks up steps. Banding that appears only after streaming compression can sometimes be reduced by slightly more texture in the master.

Archiving

Finished films are archived so they can be remastered for future formats. A good archive includes the graded master in a high-quality, wide-gamut, scene-referred form, such as an ACES2065-1 EXR sequence; ungraded camera originals and VFX finals; the grading project, LUTs, CDLs and Dolby Vision metadata; edit decision lists and change lists; and documentation of the colour pipeline. Archives are stored on LTO tape or similar long-term media in multiple locations, and periodically checked and migrated. Films graded today may be remastered decades from now for displays that do not yet exist; a well-documented archive makes it possible to honour the original intent.

Capstone: grading a short scene

The capstone brings together the skills of the course. You will grade a short scene of 15 to 30 shots, using provided footage or your own, and deliver an HDR or SDR master with a written grading report. The project is assessed on technical correctness, consistency, creative intent and professional communication.

• Prepare: set up a colour-managed project, conform the timeline from an EDL or XML, and check it against a reference movie.
• Balance and match: choose a hero shot, balance it, and match every shot using scopes, recording key values.
• Build a look: develop a scene look from references, applied at group or timeline level, with skin protected.
• Refine: use secondaries subtly to relight, direct the eye and fix problems.
• Review: watch in sequence, take notes as if from a director, and address them with relative changes.
• Deliver: render a master with correct levels, tags and metadata, check it with scopes and a QC checklist, and create a trim for a second target if possible.
• Report: write a two-page report describing intent, structure, key decisions with scope values, problems and solutions.

Rendering deliverables

Rendering deliverables is a careful, checklist-driven process. For each master, the colourist or finishing editor confirms the timeline version, output resolution and frame rate, colour space and transfer function, data or video range, codec and bit depth, file naming convention, handles or no handles, and whether titles, subtitles and textless sections are included. Render settings are saved as presets to avoid errors on later versions. After rendering, the output is reimported or played back on the reference display and checked with scopes, comparing a few frames against the grading timeline to confirm that what was rendered matches what was approved. Small mistakes at this stage, such as the wrong output transform on one deliverable, are easy to make and expensive to discover after delivery.

Versions and localization

International distribution multiplies deliverables. Different territories may need different title sequences, censored or edited versions, local credits and alternate languages, all of which must match the graded master. Textless backgrounds let distributors add local titles without regrading. Airline and broadcast versions may need edits for content and running time. Each version should be derived from the locked grade rather than regraded, and tracked carefully so that a later change to the master can be carried through every version. IMF packages make this easier by allowing versions to share the same graded picture and differ only in specific segments.

After delivery

Delivery is not quite the end. Distributors and platforms may return QC reports asking for fixes, which the colourist addresses with the same care as the main grade. Marketing teams may need graded stills, trailers and promotional clips that match the film. Festivals may request DCPs on short notice. And years later, the film may return for a remaster in a new format, when a clear archive and well-documented grade let a new colourist honour the original intent. Keeping good records, and a professional relationship with the production team, means the colourist is often the first person called when that happens.

Reflecting on the craft

Across this course you have moved from how vision works to how deliverables are checked. The common thread is that grading combines precise technical control with judgement about how images make people feel. Scopes, maths and standards keep the work honest and repeatable; perception, story and collaboration give it purpose. The capstone is an opportunity to practise both together, and the grading report is where you show not only what you did but why.

Delivery checklist

• Confirm the deliverables schedule and the latest technical specifications from each recipient.
• Lock the timeline version and verify it against the final reference movie.
• Set output colour space, transfer function, range, codec, bit depth and resolution for each master.
• Check levels and gamut with scopes and render a short test before the full render.
• Verify metadata tags, HDR mastering information and dynamic metadata.
• Run automated QC and watch every master in full.
• Document versions, settings and QC results, and archive the project.