[FFmpeg-trac] #9435(undetermined:new): swscale yuv2rgb crops image or causes glitches

[FFmpeg]

#9435: swscale yuv2rgb crops image or causes glitches
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             Reporter:  iss          |                    Owner:  (none)
                 Type:  defect       |                   Status:  new
             Priority:  normal       |                Component:
                                     |  undetermined
              Version:  unspecified  |               Resolution:
             Keywords:               |               Blocked By:
             Blocking:               |  Reproduced by developer:  0
Analyzed by developer:  0            |
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Comment (by pdr0):

 zscale is ok

 ffmpeg -ss 00:00:00.50 -i test.avi -vf zscale=matrixin=170m,format=gbrap
 -vframes 1 testz.png

 swscale was ok if you check about month ago. Not sure which commit broke
 it, but current version has the issue
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Ticket URL: <https://trac.ffmpeg.org/ticket/9435#comment:4>
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