[FFmpeg-trac] #5742(avcodec:new): h264_vaapi encoding with distorded images in result

[FFmpeg]

#5742: h264_vaapi encoding with distorded images in result
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             Reporter:  lvml        |                     Type:  defect
               Status:  new         |                 Priority:  normal
            Component:  avcodec     |                  Version:  git-master
             Keywords:  h264_vaapi  |               Blocked By:
             Blocking:              |  Reproduced by developer:  0
Analyzed by developer:  0           |
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 Summary of the bug:

 When encoding high quality 4k video files (from raw camera material) I
 encounter image corruptions after the first few I-frames in the output.

 How to reproduce:

 ffmpeg -vaapi_device /dev/dri/renderD128 -i some_4k_video.mp4 -vf
 'format=nv12,hwupload' -f matroska -qp 12 -vcodec h264_vaapi output.mkv

 Applying the patch from
 https://git.libav.org/?p=libav.git;a=patch;h=8a62d2c28fbacd1ae20c35887a1eecba2be14371
 to the current ffmpeg git master fixed the problem for me - please
 consider something like this for merging.

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Ticket URL: <https://trac.ffmpeg.org/ticket/5742>
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