[MPlayer-users] xvmc - using hardware Motion Compensate decoder

[Jouni.Lohikoski@iki.fi]

I have mplayer compiled with --enable-xvmc --with-xvmclib=XvMCW
I have nVidia FX 5600.

It seems to work with MPEG1/2 files with options:
$ mplayer -vo xvmc -vc ffmpeg12mc test.mpg

However, if "vo=xvmc," and "vc=ffmpeg12mc," is put into
$HOME/.mplayer/config all other files which can not be handled by
ffmpeg12mc will not work. "The selected video_out device is incompatible
with this codec."
And if there is "vo=xv" then non MPEG1/2 files will work.

Is there a solution to make this work better, without having to use
and choose command line options manually every time when video file is
chosen?

xvmc uses libXvMCW, which gets its configurariont from
/etc/X11/XvMCConfig. It then maps at run-time correctly to
libXvMCNVIDIA_dynamic.so.1, at least strace -eopen did show it does.

In some instructions it is recommended to use --with-xvmclib=XvMCNVIDIA,
but is this instruction obsoleted by XvMC wrapper usage?

Also, is there any way to use hardware MC with MPEG4 files?

(this question has cross reference to NV-message board:
<http://www.nvnews.net/vbulletin/showpost.php?p=598738&postcount=13> )

Beyond this post, I wonder if it would be possible to use nVidia's
GPUs to help encoding raw video to MPEG4. < http://www.gpgpu.org/ >

// jouni