[MPlayer-cygwin] colorspaces vs graphics cards

[Sycotic Smith]

Maybe instead, there should be a 'format=test' option that tests each one and reports which is fastest/optimal for your system. I see the point that each codec may have a different optimal cs, this could be used with the file to be tested, or with a -vc to test the codec you will use.
> >   -benchmark -nosound -frames 100 -vf format=colorspace
> >   
> >   where colorspace can be any colorspace printed by the -vf
> >   format=fmt=help option. If you find a colorspace your card handles
> >   particularly bad -vf noformat=colorspace will keep it from being
> >   used.
> > 
> > 
> > Now I'm not sure this is correct.  The best colorspace is codec
> > dependent IIRC.  So what should the suggestion be, use vf_format, use
> > vf_noformat, play around with either if you get bad performance or
> > none of the above?
> 
> I noticed the need for vf_noformat when I realized that mpeg decoded to
> yv12 dr into directx (no conversion) was _slower_ than converting to
> rgb32 (my primary colorspace).  IMHO, the most commonly used codecs are
> not rgb-based, so try decoding mpeg into various yuv spaces.  If you get
> worse performance for these vs rgb, then use noformat.
> 
> --Joey

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