[FFmpeg-trac] #4912(avcodec:new): While decoding an flv video av_codec_decode_video2 fails to decode the 2nd frame at first but succeeds after seeking.

[FFmpeg]

#4912: While decoding an flv video av_codec_decode_video2 fails to decode the 2nd
frame at first but succeeds after seeking.
---------------------------------+--------------------------------------
             Reporter:  tr3wory  |                     Type:  defect
               Status:  new      |                 Priority:  normal
            Component:  avcodec  |                  Version:  git-master
             Keywords:           |               Blocked By:
             Blocking:           |  Reproduced by developer:  0
Analyzed by developer:  0        |
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 '''Summary of the bug:'''

 I have a bunch of flv videos recorded with our wowza server with the same
 problem:
 When I try to decode the frames from beginnig to end, the
 avcodec_decode_video2 skips the 2nd frame (and only that).
 But if I seek back to the beginnig it will decode the second frame
 properly.

 '''How to reproduce:'''
 Attached a simple example code and sample video demonstrating the problem.
 See the asserts in line 78 and 96.

 Used version:
 ffmpeg version N-75147-g9d742d2 Copyright (c) 2000-2015 the FFmpeg
 developers
   built with gcc 4.8 (Ubuntu 4.8.4-2ubuntu1~14.04)
   configuration: --prefix='~/BUILD/ffmpeg'
   libavutil      55.  1.100 / 55.  1.100
   libavcodec     57.  1.100 / 57.  1.100
   libavformat    57.  0.100 / 57.  0.100
   libavdevice    57.  0.100 / 57.  0.100
   libavfilter     6.  1.100 /  6.  1.100
   libswscale      4.  0.100 /  4.  0.100
   libswresample   2.  0.100 /  2.  0.100

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Ticket URL: <https://trac.ffmpeg.org/ticket/4912>
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