Package: mkvtoolnix-gui

"mkvtoolnix-gui" package binaries on CentOS:

/usr/bin/mkvinfo /usr/bin/mmg

You may install this package on CentOS with yum install mkvtoolnix-gui

"mkvtoolnix-gui" package binaries on Debian:

/usr/bin/mkvinfo-gui /usr/bin/mmg

You may install this package on Debian with apt-get install mkvtoolnix-gui