[FFmpeg-trac] #4861(avcodec:open): E-AC3 audio glitch : exponent out-of-range

FFmpeg trac at avcodec.org
Sat Nov 5 13:23:08 EET 2016

#4861: E-AC3 audio glitch : exponent out-of-range
             Reporter:  Guillaume   |                    Owner:
                 Type:  defect      |                   Status:  open
             Priority:  normal      |                Component:  avcodec
              Version:  git-master  |               Resolution:
             Keywords:  eac3        |               Blocked By:
             Blocking:              |  Reproduced by developer:  1
Analyzed by developer:  0           |

Comment (by tesla_):

 Hi some news. I've try to make a statistic approch of the problem.
 I've analyse the amount begin header of each frame and each block , the
 amount of consumption of data for each block and frame for 20/30
 consequently and like i think it's very linear. With this approach i
 sucessfull find the function that sucks and doesn't consumme enough data.
 The data pointer is completely shifted for the seconde blk of the frame
 and  the error is detect only when it's possible to detect.. AKA in
 decode_exponents and with a very lucky way...
 Now next step why decode_transform_coeffs doesn't consumme the data she
 could :)

Ticket URL: <https://trac.ffmpeg.org/ticket/4861#comment:16>
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