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Subtitle Drift Fix

Subtitles fine at the start but seconds off by the end? That’s drift — usually a frame-rate mismatch — and a constant shift can’t cure it. Pin two sync points and we stretch the whole file linearly so both ends line up.

Pick a line near the start and one near the end. For each: what time does the subtitle file currently show, and what time should it actually hit? Accepts HH:MM:SS,mmm or MM:SS.

Sync point A (early)
→ should be
Sync point B (late)
→ should be