[FFmpeg-trac] #9766(avcodec:new): h264_qsv decoder does not work with RTSP

[FFmpeg]

#9766: h264_qsv decoder does not work with RTSP
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             Reporter:  Steve Sampson  |                    Owner:  (none)
                 Type:  defect         |                   Status:  new
             Priority:  normal         |                Component:  avcodec
              Version:  git-master     |               Resolution:
             Keywords:  QSV RTSP       |               Blocked By:
             Blocking:                 |  Reproduced by developer:  0
Analyzed by developer:  0              |
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Comment (by Steve Sampson):

 I tested with 5.1.2 and it still doesn't work, though this time FFMPEG
 just seems to wait for something that never comes.

  [h264_qsv @ 00000251231a3480] More data is required to decode header
     Last message repeated 154 times

 Further investigation shows that there is a setting on the Axis camera "PS
 Enabled". When checked, FFMPEG works correctly and when unchecked it does
 not.

 According to one of our customer's experts on video, this setting adds SPS
 and PPS packets to the RTP streams (NALU type 7 and 8). This information
 ought to be read from the SPD but it appears it isn't when using the QSV
 code.
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Ticket URL: <https://trac.ffmpeg.org/ticket/9766#comment:6>
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