[gentoo-user] Why does high-res video drop frames at 60% CPU?

[Grant]

I've been using VDPAU acceleration to play back Blu-Ray rips for a
while, but the extra layer is getting to be quite a hassle so I'm
trying to get decent performance via software decoding.  It has
actually come a long way since the last time I tried and playing
Blu-Ray rips via mplayer is nearly watchable.  I'm using a dual-core
3.1Ghz CPU and one of the cores is only taxed up to 60% during
playback, but frames are still being dropped constantly.  Does anyone
know where the bottleneck might be?

- Grant