Function parseVttTimestamp

packages/cli/src/whisper/normalize.ts:265–277

Parse VTT timestamp: 00:01:23.456 or 01:23.456 → seconds

(ts: string)

/** Parse VTT timestamp: 00:01:23.456 or 01:23.456 → seconds */
function parseVttTimestamp(ts: string): number {
  const parts = ts.split(":");
  if (parts.length === 3) return parseSrtTimestamp(ts);
  // MM:SS.mmm
  if (parts.length === 2) {
    const [min, secMs] = parts;
    const [sec, ms] = (secMs ?? "0.0").split(".");
    return (
      parseInt(min!, 10) * 60 + parseInt(sec!, 10) + parseInt((ms ?? "0").padEnd(3, "0"), 10) / 1000
    );
  }
  return 0;
}

/** Format SRT timestamp: seconds → 00:01:23,456 */
function formatSrtTimestamp(seconds: number): string {