[FFmpeg-trac] #8902(avcodec:new): VAAPI pixel format support regression between FFmpeg 3.x and 4.x

[FFmpeg]

#8902: VAAPI pixel format support regression between FFmpeg 3.x and 4.x
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             Reporter:  bmegli       |                    Owner:
                 Type:  defect       |                   Status:  new
             Priority:  normal       |                Component:  avcodec
              Version:  git-master   |               Resolution:
             Keywords:  vaapi        |               Blocked By:
  regression                         |
             Blocking:               |  Reproduced by developer:  1
Analyzed by developer:  0            |
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Comment (by wenbinCHEN):

 I think the "[AVHWDeviceContext @ 0x55dcc90cf7e0] Format 0x32315659 ->"
 means the pixel format supported by libva and the pixel format that can be
 encoded by h264 is a subset of them, because libva can also do video
 processing.
 In 4.x version, you may need to do the pixel format transformation
 manually. You can use sws_scale or "hwupload" filter to do this.

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Ticket URL: <https://trac.ffmpeg.org/ticket/8902#comment:4>
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