[FFmpeg-trac] #4182(undetermined:new): Unknown 16kb/s audio in Hikvision MPEG-PS recording

[FFmpeg]

#4182: Unknown 16kb/s audio in Hikvision MPEG-PS recording
-------------------------------------+-------------------------------------
               Reporter:  cehoyos    |                  Owner:
                   Type:             |                 Status:  new
  enhancement                        |              Component:
               Priority:  wish       |  undetermined
                Version:  git-       |               Keywords:  mpegps
  master                             |               Blocking:
             Blocked By:             |  Analyzed by developer:  0
Reproduced by developer:  0          |
-------------------------------------+-------------------------------------
 User sabkaraja uploaded a Hikvision recording for which H.264 video can be
 decoded with FFmpeg, audio fails. May be G.728, I was unable to find a
 modern, working decoder to test.
 Bitrate is 16kb/s, packet size is 80 bytes.
 {{{
 $ ffmpeg -i Sample.mp4
 ffmpeg version N-68392-geb72523 Copyright (c) 2000-2014 the FFmpeg
 developers
   built on Dec 12 2014 18:42:32 with gcc 4.7 (SUSE Linux)
   configuration: --enable-gpl --enable-libass
   libavutil      54. 15.100 / 54. 15.100
   libavcodec     56. 14.100 / 56. 14.100
   libavformat    56. 15.104 / 56. 15.104
   libavdevice    56.  3.100 / 56.  3.100
   libavfilter     5.  3.100 /  5.  3.100
   libswscale      3.  1.101 /  3.  1.101
   libswresample   1.  1.100 /  1.  1.100
   libpostproc    53.  3.100 / 53.  3.100
 [mp2 @ 0x1c091e0] Header missing
     Last message repeated 11 times
 [mpeg @ 0x1c07ba0] decoding for stream 1 failed
 [mpeg @ 0x1c07ba0] Could not find codec parameters for stream 1 (Audio:
 mp2, 0 channels, s16p): unspecified frame size
 Consider increasing the value for the 'analyzeduration' and 'probesize'
 options
 Input #0, mpeg, from 'Sample.mp4':
   Duration: 00:02:15.00, start: 52874.498178, bitrate: 266 kb/s
     Stream #0:0[0x1e0]: Video: h264 (Baseline), yuv420p, 352x288, 25 fps,
 25 tbr, 90k tbn, 50 tbc
     Stream #0:1[0x1c0]: Audio: mp2, 0 channels, s16p
 At least one output file must be specified
 }}}

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Ticket URL: <https://trac.ffmpeg.org/ticket/4182>
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