SubSync fixes subtitles that slowly drift out of sync because they were timed for a copy of the film with a different frame rate (25 fps vs 23.976/24 fps). A constant delay cannot fix that drift; SubSync rescales the timing.
- Auto sync: compares each subtitle with other subtitles of the same film to detect its frame rate and corrects both speed and offset.
- Merges old CD1 + CD2 subtitles into one full-length subtitle.
- Optional: when your language has no subtitle at all, translates the best available one with Claude, using your own Anthropic API key. The key is encrypted into your addon link and only sent to Anthropic.
- Manual speed variants (25→23.976, 23.976→25) as a fallback.
Subtitles come from OpenSubtitles. Open source, no tracking.