[FFmpeg-trac] #8722(undetermined:new): Video Encode engine used while decoding H264 stream in Radeon 5700XT

FFmpeg trac at avcodec.org
Tue Jun 9 09:00:22 EEST 2020


#8722: Video Encode engine used while decoding H264 stream in Radeon 5700XT
-------------------------------------+-------------------------------------
             Reporter:  jakubkulaga  |                     Type:  defect
               Status:  new          |                 Priority:  normal
            Component:               |                  Version:  4.2
  undetermined                       |
             Keywords:  dxva2 video  |               Blocked By:
  decode encode                      |
             Blocking:               |  Reproduced by developer:  0
Analyzed by developer:  0            |
-------------------------------------+-------------------------------------
 I'm testing hardware decompression of h264 stream using DXVA2 option in
 modified hw_decode example. I've added only logs and I've removed saving
 to file. Video stream resolution is 3840x2160, 59.94fps, yuv420p (but
 resolution doesn't matter).

 On Radeon 580 I'm observing, that in Task Manager Video Decode engine is
 used for about 40%.
 On Radeon 5700XT Task Manager shows Video Encode, instead of Decode and it
 is used for about 60%.

 Is it possible, that it is sth wrong in GPU driver? Driver version is
 official, not optional.

 ffmpeg (x64) version: (pre-built version)

   libavutil      56. 31.100 / 56. 31.100
   libavcodec     58. 54.100 / 58. 54.100
   libavformat    58. 29.100 / 58. 29.100
   libavfilter     7. 57.100 /  7. 57.100
   libswscale      5.  5.100 /  5.  5.100
   libswresample   3.  5.100 /  3.  5.100

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Ticket URL: <https://trac.ffmpeg.org/ticket/8722>
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