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fix(subtitles): extract embedded subtitle tracks from network-mounted media

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The network-mount skip made SMB/NFS libraries fall back to live mpv text for
any release shipping subtitles only inside the container, losing karaoke
reconstruction, sidebar cues, and mining. The starvation it guarded against
had a different cause, and measured extraction runs at wire speed (~10s/GB
on gigabit) once per episode. Skip extraction only for true remote URLs,
which have no on-disk container to demux, and raise the extraction timeout
to cover large Bluray remuxes read over the network.
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sudacode
2026-08-23 20:45:30 -07:00
parent 1717d2d3f2
commit 4635bfb264
7 changed files with 27 additions and 21 deletions
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changes/dedupe-embedded-subtitle-extraction.md
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@@ -1,5 +1,5 @@
type: fixed
area: subtitles
- Prevented embedded subtitle parsing from starving network playback: mounted SMB/NFS media now uses deduplicated mpv live text, while duplicate extraction requests for local media share one ffmpeg process.
- Live subtitle text from per-glyph typeset karaoke (network-mounted media without parsed cues) no longer shows a wall of scattered letters in the overlays; the glyph wall and its typed-syllable fragments are suppressed while concurrent dialogue lines remain.
- Embedded subtitle tracks on network-mounted (SMB/NFS) media are extracted and parsed again, restoring full karaoke reconstruction, sidebar cues, and mining for releases that ship subtitles only inside the container. Extraction reads the whole file once per episode (roughly 10 seconds per GB on gigabit), its timeout now accommodates large Bluray remuxes, and duplicate extraction requests share one ffmpeg process. Only true remote URLs keep the live-text-only path.
- Live subtitle text from per-glyph typeset karaoke no longer shows a wall of scattered letters in the overlays while extraction is still running or when no parsed cues exist (remote URLs, unreadable sources); the glyph wall and its typed-syllable fragments are suppressed while concurrent dialogue lines remain.