1/ Install gstreamer0.10-plugins-bad (doesn't matter if you install it manually or via automatic-codec-installation)
2/ Open a midi file with totem
3/ Wait until it's reproduced, and in the end, it will tell you there's no codec to play that file!
This sounds more like a bug in the GStreamer wildmidi plugin though, as otherwise we would get this dialog for every other file...
I've reproduced this:
1/ Install gstreamer0. 10-plugins- bad (doesn't matter if you install it manually or via automatic- codec-installat ion)
2/ Open a midi file with totem
3/ Wait until it's reproduced, and in the end, it will tell you there's no codec to play that file!
This sounds more like a bug in the GStreamer wildmidi plugin though, as otherwise we would get this dialog for every other file...