[FFmpeg-trac] #11553(avcodec:open): BUG error code returned when decoding vp9

[FFmpeg]

#11553: BUG error code returned when decoding vp9
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             Reporter:  jasper      |                    Owner:  (none)
                 Type:  defect      |                   Status:  open
             Priority:  normal      |                Component:  avcodec
              Version:  git-master  |               Resolution:
             Keywords:  vp9         |               Blocked By:
             Blocking:              |  Reproduced by developer:  1
Analyzed by developer:  1           |
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Changes (by mkver):

 * reproduced:  0 => 1

Comment:

 It's not a bug in the decoder, but in the FFmpeg cli tool: In
 packet_decode() in ffmpeg_dec.c an AVPacket is sent to the decoder; if
 avcodec_send_packet() does not return an error, the AVFrames are received
 until the decoder signals EAGAIN. But if an error happens, no call to
 avcodec_receive_frame() happens and the decoder is supposed to need new
 input to produce any output. This is wrong for VP9 (and maybe some other
 decoders) as there is a BSF involved and the BSF need not have been
 completely drained.
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Ticket URL: <https://trac.ffmpeg.org/ticket/11553#comment:8>
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