[FFmpeg-trac] #8615(undetermined:new): -hwaccel videotoolbox does not work anymore

[FFmpeg]

#8615: -hwaccel videotoolbox does not work anymore
-------------------------------------+-------------------------------------
             Reporter:  Atarikid     |                    Owner:
                 Type:  defect       |                   Status:  new
             Priority:  important    |                Component:
                                     |  undetermined
              Version:  git-master   |               Resolution:
             Keywords:               |               Blocked By:
  videotoolbox regression            |
             Blocking:               |  Reproduced by developer:  0
Analyzed by developer:  0            |
-------------------------------------+-------------------------------------

Comment (by su.00048):

 i have what seems to be the same issue, and started a thread ("hw_decode.c
 on osx?") on ffmpeg-user some days ago.  at least one other user there has
 seen the same behavior.  to recap briefly (let me know if you want more
 detail), i'm building a native mac app which uses the ffmpeg libs to
 handle decoding.  it's working, but when i tried to implement hardware
 decoding based on the hw_decode.c example, i see the following errors when
 trying to decode h264 or hevc (both of which are supported on my gpu):


 h264 example:

     % hwdecode videotoolbox h264.mov h264.out

     [h264 @ 0x7f8a2b003e00] get_buffer() failed
     Assertion src->f->buf[0] failed at libavcodec/h264_picture.c:70
     Abort

 hevc fails differently:

     % hwdecode videotoolbox hevc.mov hevc.out

     [hevc @ 0x7f8464814600] get_buffer() failed
     [hevc @ 0x7f8464814600] videotoolbox: invalid state
     [hevc @ 0x7f8464814600] hardware accelerator failed to decode picture
     Error during decoding
     Error during decoding

 this happens both with my code, and also when building hw_decode from
 source and running it standalone.  i've tried linking against various
 versions of the libs, both those that i've compiled myself, and those
 prebuilt and available for download.

 i'm happy to provide any more info ...

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Ticket URL: <https://trac.ffmpeg.org/ticket/8615#comment:4>
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