INDUSTRY FIELD GUIDE
Postproduction caption and cut alignment data for AI
A caption can be accurate for one cut and drift after a new opening is added.
NAICS 512191 · Teleproduction and Other Postproduction Services
A caption can be accurate for one cut and drift after a new opening is added. EBU’s audiovisual metadata work provides an asset and media-resource vocabulary. A postproduction team can show a prospective buyer a small, cleared alignment exercise with the source cut and output clearly identified. EBU media resource metadata
Create an original clip and two edit variants with a different opening length. Give the reviewer a cue file, source cut ID, timebase, and one mismatched cue. Ask which export the cue supports and what is needed to align the other. Keep spoken text and timing errors as separate labels.
Clear the script, performance, recording and derived text separately. Exclude client edits, works in progress, embedded music and protected source files from the first sample.
Describe a caption alignment dataset
Original Fiund exercise
An added opening shifts cues without changing their words
Dummy edit timelines describe an original short script. Time is measured in seconds from each cut's start, and no frame-rate conversion is required.
| Record | Source | What it records |
|---|---|---|
| PT1 | Cut A and cue file CA | Spoken line Harbor at 5.0–6.0 seconds; CA explicitly targets Cut A on its seconds timeline. |
| PT2 | Cut B edit map | Adds exactly 2.0 seconds before all Cut A content; no other edits or speed changes. |
| PT3 | Caption review | CA words match the original script. Cut B export still uses the unchanged CA cue at 5.0–6.0; no retimed file supplied. |
Question for the model
Which cut does CA directly support, and what timing difference follows for the line in Cut B without implying a text error?
Show the reference answer and checks
PT1 directly supports CA's 5.0–6.0-second cue for Cut A. PT2's explicit two-second opening moves the same line to 7.0–8.0 in Cut B. PT3 confirms the words but shows the unchanged cue, so the documented issue is alignment rather than transcription. Preserve source-cut identity and the edit map when proposing a retiming review; no corrected export has yet been recorded.
- Calling correct caption words wrong because their timing belongs to another cut.
- Reporting that a retimed export exists when only the required offset has been calculated.
Fields to preserve
- Cut and cue-file identity
- Defines the timeline a cue targets.
- Timebase and opening offset
- Makes the simple alignment calculation reproducible.
- Text versus timing label
- Separates two kinds of evaluation error.
Test another case
Replace the uniform opening with a mid-cut insertion. Require segment-specific mapping rather than adding two seconds to every cue.
Use independently written scripts and dummy timelines or separately cleared recordings. Exclude client edits, unfinished commercial work, music and protected source files.
Discuss a contribution
Describe the sources you control, the task they could support and what has already been checked. Use the existing-data assessment for an archive or the collection brief for a new recording project. The contributor agreement defines Fiund’s licensing authority and compensation. A guide or fictional exercise does not establish an accepted collection or a sale.