[FFmpeg-trac] #8515(avcodec:open): vc1_parser erroneously flagged every packet as keyframe

FFmpeg trac at avcodec.org
Sat Dec 26 07:03:08 EET 2020


#8515: vc1_parser erroneously flagged every packet as keyframe
-------------------------------------+-------------------------------------
             Reporter:  HolyWu       |                    Owner:
                 Type:  defect       |                   Status:  open
             Priority:  important    |                Component:  avcodec
              Version:  git-master   |               Resolution:
             Keywords:  vc1          |               Blocked By:
  regression                         |
             Blocking:               |  Reproduced by developer:  0
Analyzed by developer:  0            |
-------------------------------------+-------------------------------------

Comment (by Balling):

 Interestingly enough it does not happen in Blu-rays like here


 {{{
 Stream #0:0[0x1011]: Video: vc1 (Advanced) (VC-1 / 0x312D4356),
 yuv420p(bt709, progressive), 1920x1080 [SAR 1:1 DAR 16:9], 23.98 fps,
 23.98 tbr, 90k tbn, 47.95 tbc
 }}}


 Also in THIS vc1_sample.mkv file it is a little bit different
 {{{
 Stream #0:0: Video: vc1 (Advanced) (WVC1 / 0x31435657),
 yuv420p(progressive), 1920x1080 [SAR 1:1 DAR 16:9], 23.98 fps, 23.98 tbr,
 1k tbn, 47.95 tbc (default)
 }}}

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Ticket URL: <https://trac.ffmpeg.org/ticket/8515#comment:3>
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