[FFmpeg-trac] #8529(avfilter:open): the ssim_c1 has bug in vf_ssim.c

[FFmpeg]

#8529: the ssim_c1 has bug in vf_ssim.c
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             Reporter:  wangwei1237  |                    Owner:
                 Type:  defect       |                   Status:  open
             Priority:  normal       |                Component:  avfilter
              Version:  git-master   |               Resolution:
             Keywords:  ssim         |               Blocked By:
             Blocking:               |  Reproduced by developer:  0
Analyzed by developer:  0            |
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Changes (by Balling):

 * status:  new => open


Comment:

 Holy...
 https://github.com/wangwei1237/video_codec_evaluation/blob/1e02900b8212538104ed813733c5e2fefd1108ff/test/test_msssim.cpp#L99
 looks like he really uses it, is there a way to check on smth obvious? For
 example smth like these images https://wangwei1237.github.io/2020/02/15
 /how-to-calculate-the-SSIM-in-FFMpeg/

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Ticket URL: <https://trac.ffmpeg.org/ticket/8529#comment:5>
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