FA-77844 / Subtitle cue timing / Member archive

SRT timestamp parsing: fraction padding · case 04

A cue written as 00:00:01,5 starts at 1.005 s instead of 1.5 s.

Member previewVariant 4 · 3 implementations · 9 checks per implementation

Case contract

Parse an SRT timestamp HH:MM:SS,mmm to integer milliseconds. Hours have 2 or more digits, minutes and seconds are below 60, the fraction has 1 to 3 digits and is right-padded (",5" means 500 ms), "." is accepted as the separator, surrounding whitespace (including a CR from CRLF files) is ignored; invalid text returns None.

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: fraction padding	`1859012`	`1859120`	Failed

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