[FFmpeg-trac] #6642(ffmpeg:new): GPU hang in decoding hevc video by using ffmpeg

[FFmpeg]

#6642: GPU hang in decoding hevc video by using ffmpeg
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             Reporter:  hsyrja  |                     Type:  defect
               Status:  new     |                 Priority:  normal
            Component:  ffmpeg  |                  Version:  git-master
             Keywords:          |               Blocked By:
             Blocking:          |  Reproduced by developer:  0
Analyzed by developer:  0       |
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 GPU hang occurred when hw accelerated decoding is issued by ffmpeg and
 video codec is Hevc encoded.

 ffmpeg command (decode only)
 ffmpeg -hwaccel vaapi -hwaccel_device /dev/dri/renderD128
 -hwaccel_output_format vaapi -I hang.vid -f null -

 input video cam be downloaded:
 http://www.datafilehost.com/d/adf64b8a

 Tested in Skylake as wel Kabyake i7.

 Behaviour is random hang won't happen every time, but when it's happens it
 is always in ffmpeg start.

 I don't know if this is intel-vaapi-driver issue or FFmpeg issue so I will
 file bug to both projects.

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Ticket URL: <https://trac.ffmpeg.org/ticket/6642>
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