Miguel PalhasandClaude Opus 5
6cd2902341
A release whose only subtitle is a PGS or VobSub track was stuck both ways: the track satisfied English so no English SRT was ever fetched, and bitmaps can never feed a translator. §15 is amended to separate satisfying viewing from providing a translation source, and to carve a fetch made to obtain a source out of the no-upgrade rule. Timings come from the disc rather than from alass guessing at the audio. At import, each non-forced image track's packet timestamps are paired show-to-clear into a cue skeleton and stored; the fetched source is then aligned against that skeleton, and the translation made from it skips the post-translation pass, which could only move disc-exact timings off. Pairing is validated before it is trusted — even packet count, plausible durations, sane density for the runtime — because PGS allows several composition segments per subtitle and a slipped pairing is quietly half a second out. A track that fails validation gets no skeleton and falls back to aligning against the video, as does any file imported before this: there is no backfill. Closes #268 Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>