I'm having a problem with rhythmbox and music playback in general. When I click on a file in rhythmbox a popup error window appears with the title "Couldn't stop playback" and description :Unknown playback error". If I use the terminal it ouputs:
Everything else having to do with audio works, amarok even works. I never had this problem with rhythmbox before.
Rhythmbox-Message: Missing plugin: gstreamer|0.10|rhythmbox-metadata|application/smil decoder|decoder-application/smil
no application found
Rhythmbox-Message: No installation candidate for missing plugins found.
Is it the result of a recent update? How do I download and install the plugin?