Have you seen this site?
http://www.raspbian.org/
They are rebuilding the Debian distribution to make use of the floating-point hardware in the Pi - the build done by the Foundation uses software emulation. I don't know how much floating-point arithmetic is involved in MPEG decoding but it might help. Discussion on the new build is here:
http://www.raspberrypi.org/phpBB3/viewtopic.php?f=9&t=4256
http://www.raspbian.org/
They are rebuilding the Debian distribution to make use of the floating-point hardware in the Pi - the build done by the Foundation uses software emulation. I don't know how much floating-point arithmetic is involved in MPEG decoding but it might help. Discussion on the new build is here:
http://www.raspberrypi.org/phpBB3/viewtopic.php?f=9&t=4256