I can now play my ripped HD-DVDs on my Linux box. h264 ones anyways. VC-1 is still a bit of a problem, but I should be able to transcode those to h264.
Per Phoronix: I need to use the vdpau codec and video output options to get hardware accelerated HD-h264 playback at full speed.
mplayer -cache 16384 -vc ffh264vdpau -vo vdpau trailer-autobot.mkvThe cache option is because the movie resides on a samba/cifs share.
Now runs perfectly. "Who knew?"