libmpg123-0 from home:alveus:plex project
Select Your Operating System
Add repository and install manually
For openSUSE Tumbleweed run the following as root:
zypper addrepo https://download.opensuse.org/repositories/home:alveus:plex/openSUSE_Tumbleweed/home:alveus:plex.repo zypper refresh zypper install libmpg123-0