[MPlayer-users] CPU usage overhead for 3D video playback?

[Reimar Döffinger]

On Thu, Dec 30, 2010 at 09:55:27AM +0100, Michal Zatloukal wrote:
> I recently stumbled upon some 3D videos and while my C2D-powered laptop  
> plays 720p H.264 on one core with ease, a less-than-VGA 3D video  
> (original  side-by-side stream is 1200x480) brings it to its knees, so I'd  
> like to check if I'm doing something wrong, or if this is to be expected,  
> or if the graphics drivers are crap.
> The video is here> http://www.stereomaker.net/sample/disney.zip It's a  
> parallel-eyed, full color stereoscopic video which I'm trying to render  
> into red-cyan anaglyph (either color or gray) by running:
> mplayer -vf stereo3d=sbsl:arcg -vo gl disney.avi
> While playing the video without the filter, mplayer's CPU usage hovers  
> around 13% (overall, ie. 26% of one core). Using the filter, CPU usage  
> shoots up to 50% overall and video plays significantly slower than audio  
> and I get the "YOUR SYSTEM IS SLOW" message. This is on Intel GM965,  
> driver version 2.13.901, mplayer version 1.0~rc4+git20101220

-vf stereo3d is not sufficiently optimized to be usable for
high-resolution realtime processing.
-vo gl:stereo=1 should be about equivalent for your use-case though and
not use any additional processing power.