FA-78145 / Subtitle cue timing / Member archive

Shot-change snapping of cue boundaries: snap window · case 05

Boundaries exactly one window away from a cut are left unsnapped.

Member previewVariant 5 · 3 implementations · 8 checks per implementation

Case contract

For each cue, the start snaps to the nearest shot change within window ms (|shot - start| <= window; ties go to the earlier shot). The end snaps so that it sits gap ms before the nearest shot change within window of end+gap. If snapping leaves end <= start, the original cue is kept unchanged.

Why this case matters

Subtitle timing defects shift, hide or overlap captions that viewers depend on for comprehension and accessibility.

One recorded failure

Sample boundary fixture

This sample comes from the broken implementation of a controlled reproducer.

Boundary fixture	Actual	Expected	Outcome
regression: snap window	`[[3900, 3920], [101, 1201], [4000, 4060]]`	`[[3900, 3910], [101, 1201], [4000, 4060]]`	Failed

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This record includes three runnable implementations, regression fixtures, execution results, and source hashes.

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