It would be interesting to know what percentage of the DSP decoding mp3 takes (there are some figures returned in the sysfs, but I've never really looked at them. Now's the time) and how the speed limit is applied when using the DSP. If the DSP is fast enough at 133MHz, then the ARM could be run at full speed for the video decoding.

I also remember Igor talking about an unsupported rate with both DSP at full speed and the ARM at (or perhaps) above full speed. Was that a post on itt or the mailing list/irc?