Originally Posted by calestyo
I think I could have found the answer,...
Christian Marillat has disabled VDPAU for amd64 in his mplayer builds... :-/
Thank you for reminding me to only support self-compiled, latest svn MPlayer.
Note that compilation with VDPAU support does not
require the proprietary NVIDIA driver to be installed.
PS: Packman's build works fine with VDPAU.