It is better with gst-launch. I guess 15 fps on average, but cpu load is
100%. It varies on each playback. Sometimes it is (nearly) fluid for
some seconds and gets choppy again. h264 is generally faster, but I
think it is because he cannot decode the audio data in that container
and save some cpu cycles. Sometimes debug says:

"A lot of buffers are being dropped.
There may be a timestamping problem, or this computer is too slow."

How can I detect a "timestamping problem"? Probably it is connected to
issues with UXA and the intel drivers (had some trouble before and
posted on bugs.freedesktop.org which are now solved). On jaunty (EXA)
problems with video acceleration are less. And the live-cd works fine.


** Attachment added: "Debug output of gst-launch"
   http://launchpadlibrarian.net/29681121/gst_ogg.log

-- 
slow video playback, high cpu load
https://bugs.launchpad.net/bugs/406554
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