I can make VLC use hardware decoding with
vlc --ffmpeg-hw video.mkv
Is there an equivalent flag for mplayer?
Mind you if you have an nVidia graphics card you should not only specify the -vo device but also give a -vc setting. On my own system I give the following on the commandline:
(replacing 'filename' with the actual name of your file of course) and place the following in ~/.mplayer/config:
but there are several different ways of doing this. This method allows you to use different video out devices with MPlayer but will give proper -vc values when you specify -vo vdpau from the commandline.
Hope this helps :).
The command is
To see all of the video out processors, see mplayer.1.