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

tim nicholson nichot20 at yahoo.com
Thu May 21 08:36:57 CEST 2015

On 19/05/15 22:06, Carl Eugen Hoyos wrote:
> Christoph Gerstbauer <christoph.gerstbauer <at> gmail.com> writes:
>> C:\Windows\System32>ffmpeg -i
>> C:\Users\Administrator\Desktop\big_buck_bunny_ffvhuff.avi -vf
>> "scale=in_range=full:out_range=tv" -vcodec ffvhuff
> 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...
> I am not 100% sure if this is a bug, but it 
> seems so;-)

This sounds vaguely familiar and istr it only works when going YUV->RGB,
but my memory could be shakey.

> [..]

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