[MEncoder-users] Cannot achieve better picture quality with MPEG2 - help needed

[Corey Hickey]

Nicolas Hesler wrote:
> You can easily reproduce the color space conversion problem by taking 
> any rgb24 png image sequence, and then encode it with mencoder.  Compare 
> the resulting image with the original and you'll see colors change far 
> more than they should. It is very apparent if you use a video source 
> with large flat color areas, or just a matte color. (I can provide 
> samples if anyone wants them) 

That's probably a good idea.

> I converted the same rgb24 pngs to yuy2 and back again to a bitmap using 
> premiere to use as a reference - perceptually the colors were the same.
> 
> Although, I know relatively little about color space conversion, could 
> the matrices discussed on this avisynth page have something to do with 
> the color shifting?
> 
> http://avisynth.org/mediawiki/Convert

I don't know (in case you were hoping for an answer from me).

-Corey