That doesn’t mean you can’t play .mp3 files in OpenSuSe , it just takes a bit of work (not much).
Follow these instructions to get mp3 and other multimedia support on your OpenSuSe 11.3.
Use "1-click" installer to install all the required Codecs pack
If you are using KDE - Download and run (execute) thisThis will enable you to have:
If you are using Gnome - Download and execute this
To enable DVD playback - Download and execute this
Flash
Java
Latest Amarok (with MP3 Support) for KDE, or Helix-Banshee for GNOME users
Encrypted DVD (libdvdcss)
Extra XINE Codecs, for DivX/Xvid etc. (libxine1)
K3b with MP3 Support (k3b-codecs)
Win 32 Codecs (w32codec-all)
Multimedia Players:
Mplayer - Download and run this file.
VLC Player - Download and run this file.
And after successful installation you should be able to play any media files.
source:http://linuxpoison.blogspot.com/2010/07/135781677511424.html