[FFmpeg-trac] #7649(avutil:new): FFmpeg QSV initialization fails on KBL HadesCanyon (= both Intel & AMD GPUs) when DISPLAY is set

[FFmpeg]

#7649: FFmpeg QSV initialization fails on KBL HadesCanyon (= both Intel & AMD
GPUs) when DISPLAY is set
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             Reporter:  eero-t      |                    Owner:
                 Type:  defect      |                   Status:  new
             Priority:  normal      |                Component:  avutil
              Version:  git-master  |               Resolution:
             Keywords:              |               Blocked By:
             Blocking:              |  Reproduced by developer:  0
Analyzed by developer:  0           |
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Comment (by lizhong1008):

 hwaccel_device is ignored to create a vaapi device:
 https://github.com/FFmpeg/FFmpeg/blob/master/libavutil/hwcontext_qsv.c#L1232,
 vaapi_device_create() always receives a NULL device. Thus is a problem for
 multi-gpu case.
 Actually hwaccel_device for qsv just means "device selects a value in
 ‘MFX_IMPL_*’".

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Ticket URL: <https://trac.ffmpeg.org/ticket/7649#comment:1>
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