[FFmpeg-trac] #9599(undetermined:reopened): VideoToolbox VP9 hwaccel freezes ffmpeg

[FFmpeg]

#9599: VideoToolbox VP9 hwaccel freezes ffmpeg
-------------------------------------+-------------------------------------
             Reporter:  Eric Karnes  |                    Owner:  (none)
                 Type:  defect       |                   Status:  reopened
             Priority:  normal       |                Component:
                                     |  undetermined
              Version:  git-master   |               Resolution:
             Keywords:               |               Blocked By:
  videotoolbox vp9                   |
             Blocking:               |  Reproduced by developer:  0
Analyzed by developer:  0            |
-------------------------------------+-------------------------------------
Comment (by low-batt):

 As a very quick hacky test, this change to vp9.c:
 {{{
 -    .bsfs                  = "vp9_superframe_split",
 +    .bsfs                  = "vp9_superframe",
 }}}

 Caused FFmpeg to be able to decode the example video from the Chromium bug
 as well as a longer video that showed the problem.

 This is more evidence suggesting:
 * Apple never fixed Video Toolbox error handling dispite having said they
 were going to causing problems for people all over the entire planet
 * The Video Toolbox implementation for Apple Silicon does not impose the
 requirement to package alt-ref frames as superframes
 * Apple never updated the Intel Video Toolbox implementation to match the
 Apple Silicon behavior

 Late here and I am incoherent. I should have time to look into this some
 more tomorrow.
-- 
Ticket URL: <https://trac.ffmpeg.org/ticket/9599#comment:22>
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