'xine' is using vdpau no problem, but I think miro is not selecting the vdpau codecs, even when using vdpau for videout. Is that possible? I'd like to go to the miro devs with good information.
I'm using miro-2.0-rc2 (which is a massive step up from 1.2.8) like this:
miro --set xine-driver=vdpau
and the terminal output confirms vdpau is set and used, but playback is not accelerated.