MKVToolnix is a set of open source tools designed for the manipulation and creation of Matroska files (MKV). It provides a graphical user interface for creating, editing, and merging MKV files, as well as command line tools for automated processing of MKV files. The suite includes tools for cutting, merging, and splitting MKV files, as well as for embedding and extracting subtitles, chapters, and other metadata. Additionally, MKVToolnix can be used to adjust the encoding parameters of the audio and video streams within MKV files, allowing users to optimize the file size and quality of the output.
Warning May contain adware. The official website is malicious according to VirusTotal: https://www.virustotal.com/en/url/bd09e3bccec7cdeba57848369d227050b580c1132e84a47a04c0cc770c8dd7ec/analysis/1443076884/
The last discontinued version, 1.0.8, was released on September 19, 2010, but can still be downloaded from VideoHelp.com and SourceForge.