Try looking at your dmesg output, I had that same error, for me it was
caused by the version of the dsplink on the GPU and the DSP being
different.
[ 5260.788635] Version mismatch between GPP and DSP-side
[ 5260.793762] GPP-side version [1.61.03]:
[ 5260.798278] DSP-side version [1.60]:
I think there was also a mismatch in cmem versions,(dmesg will tell
you this)
What worked for me was following these instructions
http://ossie.wireless.vt.edu/trac/wiki/BeagleBoard_CodecEngine
to compile/install the codec engine in OE.
and this thread
http://groups.google.com/group/beagleboard/browse_thread/thread/a88dccbb7acc06c
(especially Brijesh's two posts.) on how to launch the pipeline
Currently I have compiled the DSP, played an MP4 without it crashing,
however something about playing videos on the DSP seems to be
crashing my USB bus,
GL