[FFmpeg-user] preserving YUV color range of 0-255

Carl Eugen Hoyos cehoyos at ag.or.at
Fri Mar 7 18:37:24 CET 2014

Dave Rice <dave <at> dericed.com> writes:

> Given that the test pattern has U and V at 128 I 
> would expect these two commands to give the same results:
> ffplay 256shades_ntsc.mov 
> -vf 'histogram=mode=waveform:waveform_mode=column'
> ffplay 256shades_ntsc.mov 
> -vf 'extractplanes=y,histogram=mode=waveform:waveform_mode=column'

Is the problem you see reproducible with ffmpeg?
ffplay is an application that depends on an external 
library that is known to contain bugs, so if the 
problem is reproducible with ffmpeg, please explain 
(Ideally, command line and complete, uncut console 

Carl Eugen

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