[MPlayer-users] How to force a special color space converter during encoding

[The Wanderer]

Daniel Lobo wrote:

> Hi all,
> 
> I'm having a problem with the color space trying to encode a raw
> video into mpeg4.
> 
> The following command (full output at the end of this email):
> 
> mencoder -vc rawbgr24flip input.avi -ovc lavc -lavcopts vcodec=mpeg4
> -nosound -o output.avi
> 
> prints: [swscaler @ 0335C550]using unscaled bgr24 -> yuv420p special
> converter
> 
> and the colors in output.avi are not the same as the original, I
> suppose because the multiple conversions between color spaces.

> So my question is if there is a command-line arg to force a bgr24 ->
> rgb32 special converter during the encoding process in order to avoid
> those unnecessary conversions.

 From a little digging in the man page, I think you want a combination of
'-vf scale' and '-vf format'. Exactly what the syntax would need to be I
don't know (I think it's something like '-vf format=rgb32,scale', but I
can't swear to that), but it ought to be possible to find out via
experimentation.

-- 
       The Wanderer

Warning: Simply because I argue an issue does not mean I agree with any
side of it.

Secrecy is the beginning of tyranny.