These packages contain applications needed to play multimedia files and games. It's a curated source where users can find and install all necessary components for media playback
zypper dup --from Htpc-alveus-de
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sudo zypper addrepo -f -n "Alveus HTPC (DE Mirror)" \
http://ftp.gwdg.de/pub/opensuse/repositories/home:/alveus:/HTPC/openSUSE_Tumbleweed/ \
Htpc-alveus-de