there won't be gpu accelerated h264 decoding for linux in near future. even if there was support in the driver - the players couldn't use it yet.
Originally Posted by hobbes
to lower cpu usage i suggest you get the latest mplayer from svn and compile it yourself. additionally you can use "-lavdopts skiploopfiler=all" to disable h264's deblocking, this helps a lot for me.
btw: with skiploopfilter and current mplayer your sample plays fine here on my old athlonxp 2600+ with radeon 9700. ~70% cpu usage.