Comment 7 for bug 86920

Look at the pipeline_description for mp3 in gconf. When you have it,
try running the command:

    $ gst-launch-0.10 fakesrc ! $DESCRIPTION ! fakesink

Does the above command fail with an error, or simply sit until you
Ctrl+C? For me, it starts up fine and runs until I type ctrl+c. For
the record, my pipeline_description is as follows:

    audio/x-raw-int,rate=44100,channels=2 ! lame name=enc mode=0 vbr-quality=6 ! id3v2mux