Editorial Turnover for Digital Intermediates
Editorial turnover gives the DI what it needs to rebuild the approved cut from camera originals and final VFX. Send the locked timeline, the interchange files requested by the DI, a matching reference movie, optical and VFX notes, and all required source media. A clean turnover reduces relinking, interpretation, and billable conform time.
Picture editorial prepares the package with the DI conform editor. The producer budgets editorial storage, data transfer, DI storage charges, and the personnel time required for the handoff. The DI provides its own working storage and conform infrastructure. After the conform, the assistant editor compares the DI check render with the editorial timeline and reports any differences before grading begins.
Timeline Preparation
Working in Reels
Many features are still completed in reels of about 20 minutes, and most theatrical features benefit from a reel-based workflow. The practice comes from negative assembly and film prints. A 2,000-foot projection reel holds roughly 22 minutes at 24 fps. That physical limit established the modern reel length.
Use reels for theatrical features when picture, sound, DCP composition, or archival benefits from parallel work and shared reel boundaries. Use a continuous longplay for streaming delivery or a single-operator finish. Episodic projects normally remain one sequence per episode.
Record the reel structure before turnover
Picture editorial confirms the reel boundaries, timecode hours, and naming with the DI and sound teams. Record those decisions in the turnover notes.
Rebalancing reels
A reel boundary may change after the first turnover. A reel can be divided, or shots can move from one reel to another. Avoid this once picture, sound, and VFX are working from established boundaries.
Rebalancing can still be worthwhile when a late VFX shot sits near a reel boundary. Moving that shot may allow an otherwise finished reel to reach DCP authoring, localization, or another distribution partner sooner. Compare the time saved against the conform, mix, redelivery, and QC work created by the change.
Leaders and Pops
Head and tail references let picture and sound verify synchronization at reel boundaries. Their positions must be exact and shared by editorial, sound, the DI, and mastering.
Build consistent reel leaders and sync references
Start each reel on its numbered hour, for example, Reel 1 at 01:00:00:00. Use an eight-second
digital head leader. Its one-frame two-pop matches a one-frame audio pop exactly two seconds
before the first frame of action (FFOA, also written FFOP).
Do not use dialogue, foley, or effects as the primary sync reference. They can be intentionally or accidentally offset by one or more frames.
For a digital tail leader, place the one-frame tail pop at LFOA + 2:00, where LFOA is the timecode
of the last frame of action (also written LFOP). At 24 fps, 47 black frames fall between LFOA and
the pop. This is sometimes described as "two seconds after the last frame." Writing the exact frame
position avoids confusion about whether the last picture frame is included in the measurement.
An optional four-second digital tail leader contains two seconds minus one frame of
black, the one-frame pop, two seconds minus one frame of black, and a one-frame FINISH card. Film
foot leaders use a different construction, and some delivery specifications omit leaders or use a
house layout. Follow the receiving facility's specification when it differs.1
Simplifying Timelines
A through-edit, sometimes referred to as a phantom edit or match-frame edit, divides one continuous source shot without changing the picture or its treatment.
Simplify the timeline after picture lock
Picture editorial flattens the timeline to the fewest tracks that preserve the edit. Remove redundant clips and tracks. Join adjacent segments separated only by a through-edit.
Keep an edit that marks an intentional change in source continuity, timing, framing, opacity, effects, or another treatment.
An unnecessary through-edit makes one logical shot appear to be several clips. This can produce incomplete or duplicate VFX plate pulls and waste media-management work. It can also create a color bump if the colorist grades the two segments differently. Dolby Vision analysis may treat the segments as separate shots and add an unnecessary metadata boundary.
Decompose nested sequences, also called compound clips, and multicam clips. Many conform systems misread their metadata. The conform editor can reject a turnover that depends on unresolved nests.
For a basic resize or reposition, use the NLE's simplest native effect. For example, use Avid Resize instead of 3D Warp or a third-party plug-in when Resize can produce the intended result. Do not assume stabilization, tracking, lens correction, or complex warps will translate through XML or AAF. Include these effects in the opticals list and provide a matching reference so the DI can rebuild them.
Creative timelines often contain overlapping layers. Remove any clip that is completely obscured by a higher track and is not required to build the composite. An edit list may still request an obscured clip, forcing the DI to restore, copy, or transcode media that never appears on screen. Removing it reduces conform complexity and media-management waste, and gives the colorist a cleaner timeline.
Organize Timeline Layers by Type
The exact track organization can vary by project.
Agree on the track layout before turnover
Picture editorial and the conform editor choose the simplest layout that preserves the edit and identifies each type of material.
A simple timeline layout can use these tracks:
| Track | Contents |
|---|---|
| V5 | Titles and graphics |
| V4 | Visual effects provided by external vendors |
| V3 | Additional optical plates if necessary (B-sides for split comps) |
| V2 | Opticals (to be completed by the conform editor) |
| V1 | Scans (Original Camera Negative [ONEG], drama, unaltered camera footage) |
If conform editorial will complete a complex optical, place its plates on adjacent tracks. Keep these tracks below the VFX and title tracks.
Edit List Generation
An edit list translates the editorial timeline into instructions the DI can conform against camera originals. Format support and export behavior vary, so the receiving conform system determines the required interchange.
Confirm the interchange before export
Picture editorial asks the conform editor which interchange format and export settings the DI requires. Export a test and prove the round trip before the final turnover.
Every timeline clip must link to one camera-original clip through a unique reel or tape name and source timecode. Cinema cameras usually derive this identity from the camera roll, clip number, date, serial number, or embedded metadata. Compare the identity in the edit list with the delivered camera originals.
For GoPro and other sources without reliable reel metadata, assign a unique reel or filename during
ingest and carry it through dailies and editorial. This is mandatory when every clip restarts at
00:00:00:00. Otherwise one timeline event may match dozens of source clips.
Maintain one time base across footage and editing timelines. Mixing 24.000 fps footage with 23.976 fps footage on a 23.976 fps timeline can produce timecode errors that increase the complexity of the conform, and sound that drifts progressively against picture. The majority of American independent features are shot and edited at 23.976 fps, but that is a convention rather than a rule: see Frame Rate: 23.976 or 24.000 for the decision and the sync arithmetic behind it.
EDL
CMX-style EDLs date back to tape-to-tape online editing and remain the most universal interchange. They are plain text and easy to inspect or repair. Export one EDL per video layer.
EDLs cannot describe resizes, repositions, flips, or flops. Treat variable speed ramps as
unsupported. A syntax exists, but modern tools rarely write or read it.5 EDL comments
can carry all ten ASC CDL values through *ASC_SOP and *ASC_SAT.
Reel names and the 8-character limit
A strict CMX 3600 EDL allows only 8 characters for the reel or tape name. Longer names are
truncated. If several names share the first eight characters, they become identical and cannot
identify the source. Most EDL writers preserve the full name in a * FROM CLIP NAME: comment, but
the primary reel field remains ambiguous.
Most modern EDL parsers accept longer reel names, but one incompatible tool can still break the conform. Agree on reel naming with the DI. Keep source names unique within the first eight characters where practical. Then test the round trip.
A strict CMX 3600 EDL is also capped at 999 events, which a feature reel can exceed on a cut-heavy sequence. If it does, split the list.
XML
In DI finishing, "XML" usually means Apple's Final Cut Pro 7 XML Interchange Format, also exported by Adobe Premiere. It supports multiple layers, resizes, repositions, and speed ramps. The conform system may interpolate ramps differently, so compare them against the offline reference.
XML files are human-readable but verbose.
AAF
AAF stands for Advanced Authoring Format. Media Composer uses it for picture and audio turnover. Other editing systems use it to hand audio sessions to Pro Tools.
AAF supports multiple layers and carries much of the metadata available in XML. Current Media Composer versions describe speed ramps with discrete keyframes instead of leaving another application to infer the interpolation. Test the AAF round trip because applications can still interpret the same keyframes differently. AAF is binary and not human-readable.
FCPXML
A newer flavor of XML used by Final Cut Pro. DaVinci Resolve supports it, but not every conform system does. It improves on FCP 7 XML in most respects and supports multi-layer timelines.
Do not rely on FCPXML for a complete ASC CDL
FCPXML can represent lift, gamma, and gain adjustments as slope, offset, and power values. This is a translation of those grading controls, not an ASC CDL implementation. It does not include the CDL saturation value. If CDL decisions must travel with the cut, send an EDL, ALE, CC, or CCC alongside it.2
OTIO
OpenTimelineIO (OTIO) is an open-source timeline format and API created at Pixar and now managed
by the Academy Software Foundation. A plain .otio file stores timeline metadata in human-readable
JSON and references media stored elsewhere. It can describe clips, tracks, transitions, markers,
retimes, and production metadata. Application-specific effects and grades may not survive a round
trip.
DaVinci Resolve and Nuke Studio/Hiero import and export OTIO. FilmLight has announced .otio
import and export for a Baselight v7 point release. Confirm the installed application version and
test the round trip before choosing OTIO for a turnover. Support is broad, but not universal.
Use plain OTIO when media travels separately
Use .otio when the DI already has the media or will receive it separately. It is also useful
for comparing revisions, updating VFX renders in a cut, and validating edit positions with
scripts. Adapters can translate other timeline formats, but retain only features understood by
both formats.3
OTIO bundles
OTIO defines two bundle formats that package timeline metadata with referenced media:
.otiozis one ZIP file. Use it for small turnovers, test sequences, review packages, or a transfer that must arrive already linked. It can become very large. DaVinci Resolve includes each clip's complete media file, not only the used range. Updating one asset requires a new bundle..otiodstores the same timeline and media in a directory. Use it when people or scripts need direct access to the packaged files. It is less convenient to transfer, and fewer applications support it.
Do not use an OTIO bundle as the archive
Confirm that the receiving application supports the specific bundle type. Keep the original media and transfer records outside the bundle. A bundle does not replace a planned feature media turnover.4
Choosing a format: what each can carry
Every format must identify each source clip by tape name and timecode. Their support for layers, effects, color, and translation differs:
| Capability | EDL | FCP7 XML | AAF | FCPXML | OTIO |
|---|---|---|---|---|---|
| Human-readable | ✓ text | ✓ verbose | ✗ binary | ✓ verbose | ✓ JSON |
| Tape name + timecode | ✓ | ✓ | ✓ | ✓ | ✓ |
| Multi-layer timelines | ✗ one/file | ✓ | ✓ | ✓ | ✓ |
| Resize / reposition | ✗ | ✓ | ✓ | ✓ | ~ application-specific |
| Variable speed ramps | ✗ in practice³ | ✓ interpolated | ✓ discrete keyframes¹ | ✓ | ~ linear / application-specific |
| ASC CDL color | ✓ SOP + SAT, in comments | ✗ | ~ | ~ lift, gamma, gain only² | ~ metadata |
| Origin / lineage | CMX tape online | FCP7 · Premiere | Avid · Pro Tools | Final Cut Pro X · Resolve | ASWF (Pixar), cross-NLE |
| DI acceptance | ✓ universal | ✓ common | ✓ common | ~ Resolve+ | ✓ broad, version-dependent⁴ |
¹ Discrete speed-ramp keyframes in AAFs from recent Avid Media Composer versions.
² Lift, gamma, and gain can translate to slope, offset, and power. This is not a complete ASC CDL.
³ A variable-rate syntax exists, but tooling support is effectively absent.
⁴ DaVinci Resolve and Nuke Studio/Hiero support OTIO. FilmLight lists .otio import and export for
a forthcoming Baselight v7 point release.
EDL is the editable, universal baseline. XML and FCPXML add layers and effects. AAF adds discrete speed-ramp keyframes but is binary. OTIO provides a modern multi-track exchange and a structured format for automation.
List-management tooling
Manual edit-list repair is error-prone. Video Village's DI tools include utilities for inspecting, cleaning, and reconciling lists before conform.
Offline Reference and Conform Checks
Offline reference: editorial to DI
Picture editorial sends a matching QuickTime export with the initial turnover. Use Avid DNx LB or Apple ProRes 422 Proxy / LT. DNxHD 36 remains in older HD workflows but cannot carry UHD. Avoid H.264 when possible because compression artifacts can resemble timing or conform errors.
Update the offline reference after every timing change
Picture editorial sends the DI a new reference for every affected reel or sequence. The reference records the intended edit, including timing and temporary opticals.
Conform checks: DI to editorial
After a major conform milestone or cut change, the DI sends picture editorial a conform check or confidence check encoded as DNx or ProRes. The check can include source clip names and timecode burn-ins. The assistant editor compares it with the offline reference and reports every difference to the DI.
The DI can also send an EDL of its conformed timeline. Assistant editors can use the EDL for VFX version checks or automated comparisons of edit positions. The movie remains the visual proof of edit integrity.
Approve the conform before final grading
The assistant editor compares each conform check with the matching editorial reference. Report every cut, speed, framing, title, optical, and VFX version discrepancy to the DI.
Opticals List
The term opticals comes from optical printing. A laboratory rephotographed existing film to create transitions, titles, reframes, speed changes, and composite images.6
In a modern DI, opticals usually refers to editorially driven image operations that the conform or finishing editor handles without a separate VFX turnover. Production may track them in an opticals list rather than assign formal VFX shot numbers. The distinction concerns scope, scheduling, and who performs the work, not a lower image-quality requirement.
Simple opticals include basic resizes, repositions, flips, flops, dissolves, transitions, straightforward stabilization, locked-off split screens, and timewarps where motion estimation produces an acceptable result without paint work. The conform editor can usually rebuild these operations.
Complex opticals are small 2D composites that approach VFX work. They include difficult stabilization, simple paint fixes, object removals, beauty work, split screens that need cleanup, and timewarps that require paint fixes. A conform or finishing editor may complete a limited task quickly enough that a separately managed VFX shot would add little value. The work is usually 2D compositing, rarely involving 3D camera tracking, projection, or CGI. A task that needs those methods, extensive revisions, or substantial artist time is a stronger candidate for a VFX turnover.
A DI team may handle opticals with Fusion in DaVinci Resolve, Nuke, Flame, or Resolve color-page tools such as Patch Replacer. Complex opticals are usually billed separately. They must not be assumed to be part of the conform package.
Speed Warp in DaVinci Resolve can outperform classic optical flow on difficult shots, but no motion-estimation method is flawless. Review every timewarp for warped objects, duplicated detail, and broken motion. Assign numerous or demanding opticals to a VFX artist or vendor.7
List every optical for the conform
Picture editorial identifies every optical and states whether the DI must match the offline or improve it. Use timeline markers, edit-list comments, or a spreadsheet with event timecode and instructions. Have the DI confirm which opticals it can complete within the bid and schedule. Assign the remaining work to VFX before finishing begins.
Media Consolidation and Delivery
Major studio features often keep camera-original LTO archives in the DI vendor's vault throughout production and finishing. The facility can then restore media for dailies, VFX pulls, and final conform without shipping the archive between companies.
Independent productions usually hold their camera originals across several external drives. The DI turnover requires separate transport storage so the protected copies remain with production.
Keep a protected copy before shipping media
Production retains at least one checksum-verified copy of every asset under its control. Budget separate shuttle drives for vendor delivery. Never send a vendor the only copy. Before DI turnover, copy the required media onto as few transport volumes as practical. Editorial can trim sources with agreed handles or isolate only the clips used in the cut after agreeing on the method with the DI.
Delivering VFX to DI
After the initial conform turnover, picture editorial sends change notes and VFX updates. If an update changes timing, picture editorial also sends a new offline reference for every affected reel or sequence. If timing remains unchanged, use the original reference unless the DI requests another.
Edit lists must carry the complete VFX shot name and intended version. The intended version is the render the DI must cut in now. It can be a work in progress that advances the conform while the final render is pending. Mark its status so nobody mistakes it for an approved final.
Match the offline QuickTime to the DI render through header timecode or frame number, as agreed with the DI. Test this before vendors deliver many shots because NLEs may interpret QuickTime timecode differently.
Label every VFX update for the DI
Picture editorial identifies the complete shot name, intended version, and approval status. Send a new offline reference whenever the update changes timing. Test the timecode or frame-number match before vendors deliver a large batch.
Common Issues and Solutions
NLE effects may not translate through XML or AAF and rarely survive an EDL. Supply an EDL beside the primary XML or AAF so the conform editor has a simple metadata reference when the richer format fails.
Also include the NLE project containing the turnover timeline when the conform editor can open it. The project may omit media. It remains useful for checking metadata, effects, and relink failures.
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SMPTE, RP 428-6, secs. 4 and 9–10; SMPTE, RP 25, secs. 5–6; SMPTE, ST 55, secs. 6 and 8. ↩
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Apple, FCPXML Version 1.1 DTD, info-asc-cdl element comment. ↩
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Academy Software Foundation, “Conform New Renders into a Cut.”; Blackmagic Design, DaVinci Resolve 21 Reference Manual, “Conforming OTIO Files,” p. 544; Foundry, “OTIO Full Round Trip.”; FilmLight, Baselight v7, p. 4. FilmLight marks OTIO support as forthcoming in a v7 point release. ↩
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Academy Software Foundation, “File Bundles.”; Blackmagic Design, DaVinci Resolve 21 Reference Manual, “Conforming OTIO Files,” p. 544. ↩
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SMPTE 258M-2004, §§5.2.5 and 7.6.5. ↩
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Kodak, “Glossary of Motion Picture Terms,” entries “Optical Effects” and “Optical Printer.” ↩
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Blackmagic Design, DaVinci Resolve 21 Reference Manual, “Motion Estimation Mode,” p. 148, and “Patch Replacer,” p. 3722. ↩