[FFmpeg-trac] #8820(avcodec:open): skip_frame nokey skips everything but IDR frames (H.264)

[FFmpeg]

#8820: skip_frame nokey skips everything but IDR frames (H.264)
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             Reporter:               |                    Owner:  (none)
  skippableframe                     |
                 Type:  defect       |                   Status:  open
             Priority:  minor        |                Component:  avcodec
              Version:  git-master   |               Resolution:
             Keywords:  h264         |               Blocked By:
             Blocking:               |  Reproduced by developer:  0
Analyzed by developer:  0            |
-------------------------------------+-------------------------------------
Comment (by Balling):

 Because ffprobe -flags2 +showall -skip_frame nokey -show_frames -i
 unknown.opengop.mp4

 prints

 illegal short term buffer state detected


 I decided to reencode the file with new x264 encoder. Neither mp4 nor x264
 outputs do not help. Nor does x264.exe --vf=resize:1920,1080 --open-gop -o
 unknown.opengopnew.mp4 unknown.opengopold.mp4
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Ticket URL: <https://trac.ffmpeg.org/ticket/8820#comment:12>
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