A dedicated Matroska (.mkv) multi-track stream multiplexer, track extractor, and chapter editor for Linux.
A lightweight Linux alternative to MKVToolNix GUI for lossless Matroska stream muxing, track metadata editing, and demuxing.
Key features powered by bundled FFmpeg:
- Lossless Matroska (.mkv) multiplexing (-c copy) combining multiple video, audio, and subtitle (.srt, .ass, .vtt) sources without re-encoding.
- Interactive stream table to inspect codecs, toggle included tracks (-map), edit ISO 639-2 language codes, set custom track titles, and configure default track disposition flags.
- Live FFmpeg multiplexing command-line preview updating automatically as tracks and metadata change.
- Lossless Track Extractor / Demuxer to export embedded audio, subtitle, or video streams into standalone files.
- Container Chapters & Metadata Inspector to examine stream headers and remux custom Matroska chapter markers.
Disclaimer: This project is an independent open-source tool and is not affiliated with, sponsored by, or endorsed by Moritz Bunkus or the MKVToolNix project.