Mike Lampard suggested Option "XvmcUsesTextures" "False"
and thought it could hold xxmc from falling back to Xv, but its not.
i answered him:
yes that works but xxmc does not utilize that much hardware than xvmc do, i.e. idct stuff. i have 40% cpu with xvmc and 60-70% with xxmc. it uses that other port
video_out_xxmc: using Xv port 244 from adaptor NV17 Video Overlay for hardware colorspace conversion and scaling.
port 245 of xvmc plugin is twice as fast :)