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.
The packages for RHEL 8 and RHEL 7 are in each distribution’s respective Extra Packages for Enterprise Linux (EPEL) repository. The instructions for adding this repository diverge slightly between RHEL 8 and RHEL 7, which is why they’re listed separately below.
The EPEL repository can be added to RHEL 8 with the following command: