mkvtoolnix-gui from home:plater project

For Tumbleweed run the following as root:

zypper addrepo https://download.opensuse.org/repositories/home:plater/Tumbleweed/home:plater.repo
zypper refresh
zypper install mkvtoolnix-gui

For Factory run the following as root:

zypper addrepo https://download.opensuse.org/repositories/home:plater/Factory/home:plater.repo
zypper refresh
zypper install mkvtoolnix-gui

For 15.6 run the following as root:

zypper addrepo https://download.opensuse.org/repositories/home:plater/15.6/home:plater.repo
zypper refresh
zypper install mkvtoolnix-gui

For SLE-15-SP5 run the following as root:

zypper addrepo https://download.opensuse.org/repositories/home:plater/SLE-15-SP5/home:plater.repo
zypper refresh
zypper install mkvtoolnix-gui

For Backports SLE-15-SP6 run the following as root:

zypper addrepo https://download.opensuse.org/repositories/home:plater/Backports_SLE-15-SP6/home:plater.repo
zypper refresh
zypper install mkvtoolnix-gui