• Lots of improvements from PRs submitted by @alucryd (big thanks!):
  • Retain ASS styles;
  • Support syncing several subs against the same ref via --overwrite-input flag;
  • Add --apply-offset-seconds postprocess option to shift alignment by prespecified amount;
• Filter out metadata in subtitles when extracting speech;
• Add experimental --golden-section-search over framerate ratio (off by default);
• Try to improve sync by inferring framerate ratio based on relative duration of synced vs unsynced;