Video Subtitle Extractor and Converter is a desktop utility for inspecting and demuxing embedded subtitle streams from video containers, analyzing DVD VobSub index files, and converting subtitle tracks across standard text formats. A lightweight Linux alternative to VobSub for subtitle track extraction, timing synchronization, and multi-format caption conversion.

Key Features:

• Embedded Subtitle Track Demuxer: Probes MKV, MP4, WebM, MOV, TS, and AVI media containers via bundled FFmpeg to inspect language tags, codecs, default/forced dispositions, and demuxes subtitle streams without re-encoding video.
• Multi-Format Subtitle Converter: Converts cleanly between SubRip (.srt), WebVTT (.vtt), SubStation Alpha (.ass/.ssa), synchronized lyrics (.lrc), and plain text transcripts (.txt) with live cue-by-cue preview and CPS metrics.
• Timing Offset, FPS Rescaler & Text Cleaner: Shifts subtitle cues by +/- ms, rescales timestamps across frame rates (23.976, 24, 25, 29.97, 30, 50, 59.94 fps), and removes HTML tags, ASS override codes, and hearing-impaired SDH brackets.
• DVD VobSub (.idx / .sub) Inspector: Parses VobSub v7 index headers, renders the 16-color DVD subtitle palette, inspects language stream timestamps and MPEG-PS packet offsets, shifts VobSub timings, and exports JSON/CSV cue reports.

Disclaimer: This project is an independent open-source tool and is not affiliated with, sponsored by, or endorsed by Gabest or the VobSub project.