MKVToolNix

The suite provides command‑line and graphical utilities for creating, editing, and examining Matroska (MKV) multimedia containers on Linux, other Unix‑like systems, and Windows. Users can merge tracks, split files, modify metadata, and inspect container structure without re‑encoding, allowing precise manipulation of video, audio, and subtitle streams.

It is aimed at developers, media professionals, and hobbyists who need reliable, scriptable control over MKV files, such as for batch processing, archival, or custom packaging workflows. The tools support a wide range of codecs and container features, and they expose detailed information about track properties and chapter data.

Distinctive aspects include long‑term maintenance since 2003, frequent releases with updated package builds for many Linux distributions, and an open‑source codebase hosted on Codeberg. The project also provides documentation, a FAQ, and a bug‑report channel to encourage community contributions.