[FFmpeg-trac] #3661(avcodec:new): Unable to play AC-3 stream in Blu-Ray

FFmpeg trac at avcodec.org
Thu May 22 12:30:08 CEST 2014

#3661: Unable to play AC-3 stream in Blu-Ray
             Reporter:  OrbWeaver  |                     Type:  defect
               Status:  new        |                 Priority:  normal
            Component:  avcodec    |                  Version:  git-master
             Keywords:  ac3        |               Blocked By:
             Blocking:             |  Reproduced by developer:  0
Analyzed by developer:  0          |
 Summary of the bug:
 Attempting to view the Blu-Ray "Defiance" (UK release) using mplayer built
 against ffmpeg git commit f932e5f7169282daaa06b08500d2c632cf70e14e results
 in missing audio after the first few seconds, with multiple errors on the
 console. Extracting the audio stream to a separate file and playing with
 ffplay gives the same result:

 ffplay version N-40092-gf932e5f Copyright (c) 2003-2014 the FFmpeg
   built on May 22 2014 10:10:57 with gcc 4.8 (Ubuntu 4.8.2-19ubuntu1)
   configuration: --enable-ffplay
   libavutil      52. 86.100 / 52. 86.100
   libavcodec     55. 63.100 / 55. 63.100
   libavformat    55. 40.100 / 55. 40.100
   libavdevice    55. 13.101 / 55. 13.101
   libavfilter     4.  5.100 /  4.  5.100
   libswscale      2.  6.100 /  2.  6.100
   libswresample   0. 19.100 /  0. 19.100
 [ac3 @ 0x7fd23c0008c0] Estimating duration from bitrate, this may be
 Input #0, ac3, from '/tmp/defiance_ac3.dump':
   Duration: 00:03:07.25, start: 0.000000, bitrate: 448 kb/s
     Stream #0:0: Audio: ac3, 48000 Hz, 5.1(side), fltp, 448 kb/s
 [ac3 @ 0x7fd23c005be0] frame sync errorvq=    0KB sq=    0B f=0/0
 [ac3 @ 0x7fd23c005be0] new coupling strategy must be present in block 0
 [ac3 @ 0x7fd23c005be0] error decoding the audio block
 [ac3 @ 0x7fd23c005be0] frame sync errorvq=    0KB sq=    0B f=0/0
 [ac3 @ 0x7fd23c005be0] Additional substreams is not implemented. Update
 your FFmpeg version to the newest one from Git. If the problem still
 occurs, it means that your file has a feature which has not been
 [ac3 @ 0x7fd23c005be0] If you want to help, upload a sample of this file
 to ftp://upload.ffmpeg.org/MPlayer/incoming/ and contact the ffmpeg-devel
 mailing list.
 [ac3 @ 0x7fd23c005be0] unsupported frame type : skipping frame

 Complete ffplay command output is here: http://pastebin.com/y24PTdFD

 The video looks OK and the other audio streams on the Blu-Ray play without
 problems, so this doesn't seem to be a problem with failed AACS
 decryption. I will attach the start of the AC-3 audio stream in question
 to illustrate the problem.

Ticket URL: <https://trac.ffmpeg.org/ticket/3661>
FFmpeg <https://ffmpeg.org>
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