what happens if you play the file with gst-launch-0.10 playbin uri="file:///path/to/file" ?
-- gstreamer0.10 refuses to play certain valid MP3s (not all, but some) https://launchpad.net/bugs/42247 -- desktop-bugs mailing list desktop-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/desktop-bugs
