mplayer -vo vdpau -vc ffh264vdpau file.mp4 # use VDPAU and GPU-assisted decoding
mplayer -vo vdpau -vc ffh264 file.mp4 # use VDPAU and software decoding
mplayer -vo xv -vc ffh264 file.mp4 # use Xv and software decoding