FA-78727 / Broadcast timecode arithmetic / Member archive

Playout schedule on-air times: gap unit · case 02

Black between clips lasts seconds instead of frames.

Member previewVariant 2 · 3 implementations · 8 checks per implementation

Case contract

Clips [SOM, EOM] use non-drop labels at fps with EOM inclusive; a clip may cross midnight on tape. Clips air back to back from start with gap black frames between consecutive clips. Return the on-air label of each clip followed by the exclusive end label of the schedule, wrapping at 24 hours.

Why this case matters

Timecode arithmetic errors misplace edits, commercial breaks and captions against the broadcast clock.

One recorded failure

Sample boundary fixture

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

Boundary fixture	Actual	Expected	Outcome
regression: gap unit	`["23:59:50:00", "14:00:15:11", "00:01:10:06", "01:01:40:07"]`	`["23:59:50:00", "13:59:51:06", "00:00:21:26", "01:00:51:27"]`	Failed

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

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