[FFmpeg-trac] #10715(ffmpeg:new): QSV decoder fails to get configured and issues Error initializing the MFX video decoder: unsupported (-3)

[FFmpeg]

#10715: QSV decoder fails to get configured and issues Error initializing the MFX
video decoder: unsupported (-3)
-------------------------------------+-------------------------------------
             Reporter:  tipoman      |                    Owner:  (none)
                 Type:  defect       |                   Status:  new
             Priority:  normal       |                Component:  ffmpeg
              Version:  unspecified  |               Resolution:
             Keywords:  ffmpeg ,     |               Blocked By:
  qsv, intel, hevc , hardware        |
  decoding                           |
             Blocking:               |  Reproduced by developer:  0
Analyzed by developer:  0            |
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Comment (by wenbin,chen):

 According to
 https://spec.oneapi.io/onevpl/latest/API_ref/VPL_func_vid_decode.html#_CPPv431MFXVideoDECODE_DecodeFrameAsync10mfxSessionP12mfxBitstreamP16mfxFrameSurface1PP16mfxFrameSurface1P12mfxSyncPoint

 “Before decoding the first frame, a sequence header (sequence parameter
 set in H.264 or sequence header in MPEG-2 and VC-1) must be present. The
 function skips any bitstreams before it encounters the new sequence
 header”
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Ticket URL: <https://trac.ffmpeg.org/ticket/10715#comment:2>
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