[MPlayer-users] Single threaded mencoder on a Dual Core machine

[Giacomo Comes]

On Wed, Apr 19, 2006 at 07:10:35PM +0200, Meino Christian Cramer wrote:
> Hi,
> 
>  as far as I know, mencoder isn't able to use both cores of a modern
>  Dual Core CPU like an AMD64 X2 since it is single threaded. 

man mplayer
/threads

http://www.mplayerhq.hu/DOCS/HTML/en/menc-feat-dvd-mpeg4.html#menc-feat-dvd-mpeg4-codec

Giacomo

> 
>  What I know for sure is, that only 50% load is on my CPU, when
>  mencoder is working on a video. Or in other words: The encoding
>  process will take twice the time....
> 
>  Since I am doing two-pass-encoding, I had an idea which may be
>  completly nonsens (or not...I dont know the internals of the encoding
>  process...):
> 
>  Would this script (or simmiliar) work:
> 
>  #!/bin/sh
>  mencoder ...... -o /dev/null .... -vf pass=1 <infile>;
>  sleep 60
>  mencoder ...... -o <outfile> .... -vf pass=1 <infile>;
> 
>  ...starting the second process to utilize the second core with a
>  delay to not to get in collsion with the "result stream" of the
>  forst process...
> 
>  Only an idea !
> 
>  Would something like that work ?
>  mcc