[FFmpeg-user] In and out-range Scale option able to correct 0-255 video to 0-235?

Carl Eugen Hoyos cehoyos at ag.or.at
Thu May 21 10:05:05 CEST 2015

tim nicholson <nichot20-at-yahoo.com <at> ffmpeg.org> writes:

> > It seems to me that the scale filter is so smart 
> > that it doesn't scale if the input and output 
> > resolution and input and output colourspace 
> > are identical.
> > 
> > Even worse, both the filter and the software 
> > scaler are smart enough to skip actual scaling, 
> > so fixing the issue in the scale filter is not 
> > sufficient...
> This sounds vaguely familiar and istr it only works 
> when going YUV->RGB, but my memory could be shakey.

It works fine here for YUV->YUV if I apply the vf_scale 
patch I posted on -devel and if I disable the "smart" 
detection in libswscale.

Carl Eugen

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