The avenard mplayer does work...however other changes in LinuxMCE sources will be needed too...its not enough to merely replace xinelib. We're going to start looking at what the changes next...feel free to start poking around though ;-)
OK, I will se if I find the time
But interesting enough I did see that the mplayer did use VO: vdpau but the CPU load of the I Am Legend trailer I played was still the same as before !?
1. test was with mplayer in the KDE shell and pressing f for dullscreen.
2. test was in mythvideo after changing "-vo vdpau" in settings.
Both the same result !?
Did setup 1080i 50hz