I've tried something else : installed gnome-codec-installer (this asked me to remove sessioninstaller)
then opened Rhythmbox and tried to import tracks from an audio CD to mp3 still failed but error message has changed : Le format des paramètres passés à l’application est invalide. Merci de signaler ce bogue ! Les paramètres étaient : --transient-for=71303216 gstreamer|1.0|rhythmbox|MPEG-1 Layer 3 (MP3) encoder|encoder-audio/mpeg, mpegversion=(int)1, layer=(int)3 -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1348222 Title: Rhythmbox asks for installing MPEG-1 Layer 3 (MP3) encoder To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/rhythmbox/+bug/1348222/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs