[FFmpeg-trac] #5096(swscale:new): video range shifted at high bit depth video transcoding

[FFmpeg]

#5096: video range shifted at high bit depth video transcoding
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             Reporter:  Thomas Mundt  |                    Owner:
                 Type:  defect        |                   Status:  new
             Priority:  important     |                Component:  swscale
              Version:  git-master    |               Resolution:
             Keywords:  regression    |               Blocked By:
             Blocking:                |  Reproduced by developer:  0
Analyzed by developer:  0             |
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Comment (by Thomas Mundt):

 After some more tests I found the reason for this.
 The problem is, that in the filter_frame function in vf_scale.c the color
 range of the out frame is always copied from the in frame. So any
 following scaler in the filter chain will detect the need of a color range
 conversion although it is already done by the first scaler.
 I´ll send a patch to the dev mailing list...

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Ticket URL: <https://trac.ffmpeg.org/ticket/5096#comment:4>
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