mkvtoolnix-gui from openSUSE:Backports:SLE-15-SP3:Update project
Seleziona il sistema operativo
Aggiungi il repository e installa manualmente
Per standard eseguire quanto segue come root:
zypper addrepo https://download.opensuse.org/repositories/openSUSE:Backports:SLE-15-SP3:Update/standard/openSUSE:Backports:SLE-15-SP3:Update.repo zypper refresh zypper install mkvtoolnix-gui