MKVToolNix is a set of tools to create, alter and inspect Matroska files
Matroska is an extensible, open source, open standard Multimedia container.
Matroska is usually found as .MKV files (matroska video), .MKA files (matroska
audio) and .MKS files (subtitles) and .MK3D files (stereoscopic/3D video).
It is also the basis for .webm (WebM) files.
For versions of Ubuntu between 14.04 LTS (Trusty Tahr) and 15.10 (Wily Werewolf), as well as Ubuntu flavours that don’t include snap by default, snap can be installed from the Ubuntu Software Centre by searching for snapd.
Alternatively, snapd can be installed from the command line:
Either log out and back in again, or restart your system, to ensure snap’s paths are updated correctly.
To install mkvtoolnix-jz, simply use the following command: