[FFmpeg-trac] #8789(undetermined:new): ffmpeg cannot properly decode some videos using the hardware acceleration framework VideoToolbox on macOS

[FFmpeg]

#8789: ffmpeg cannot properly decode some videos using the hardware acceleration
framework VideoToolbox on macOS
-------------------------------------+-------------------------------------
             Reporter:  dddong       |                     Type:  defect
               Status:  new          |                 Priority:  normal
            Component:               |                  Version:
  undetermined                       |  unspecified
             Keywords:               |               Blocked By:
             Blocking:               |  Reproduced by developer:  0
Analyzed by developer:  0            |
-------------------------------------+-------------------------------------
 Summary of the bug:
 I tried to use ffmpeg to decode the video in h264 encoding format. On the
 macOS platform, videotoolbox can be used to perform hardware acceleration
 on video decoding. I turned on this option, but the output of ffmpeg shows
 that there is a problem with creating Videotoolbox decoder. When hardware
 acceleration is not used, ffmpeg can correctly decode the video. Quicktime
 Player can also play the video normally.

 How to reproduce:
 {{{
 % ffmpeg  -hwaccel videotoolbox -i 0a4f103fc689528483c66c7535760591.mov
 -f rawvideo  -vframes 1 /dev/null
 ffmpeg version N-98432-gf1feb3b Copyright (c) 2000-2020 the FFmpeg
 developers
 built on built with Apple clang version 11.0.3 (clang-1103.0.32.62)
   configuration: --enable-pthreads --enable-version3 --enable-avresample
 --cc=clang --host-cflags=-fno-stack-check --enable-ffplay --enable-gnutls
 --enable-videotoolbox --disable-libjack --disable-indev=jack --disable-
 x86asm
   libavutil      56. 55.100 / 56. 55.100
   libavcodec     58. 94.100 / 58. 94.100
   libavformat    58. 48.100 / 58. 48.100
   libavdevice    58. 11.101 / 58. 11.101
   libavfilter     7. 86.100 /  7. 86.100
   libavresample   4.  0.  0 /  4.  0.  0
   libswscale      5.  8.100 /  5.  8.100
   libswresample   3.  8.100 /  3.  8.100
 Hyper fast Audio and Video encoder
 }}}
 The full output is in the attachment ffmpeg-20200714-171859.log.

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Ticket URL: <https://trac.ffmpeg.org/ticket/8789>
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