[FFmpeg-trac] #7720(undetermined:new): ffprobe and AVI audio delay

FFmpeg trac at avcodec.org
Sun Feb 10 00:13:20 EET 2019

#7720: ffprobe and AVI audio delay
             Reporter:  DCTing       |                    Owner:
                 Type:  defect       |                   Status:  new
             Priority:  normal       |                Component:
                                     |  undetermined
              Version:  unspecified  |               Resolution:
             Keywords:  AVI          |               Blocked By:
             Blocking:               |  Reproduced by developer:  0
Analyzed by developer:  0            |

Comment (by DCTing):

 Finally I got a clean test file, thanks for the trimming idea.

 Steps to reproduce:

 1-Download sample TEST1.AVI file (just 8Mb size):

 2-Play it. Note that in t=00:00:28:345 audio pronounces the word: "TOKYO".
 This is the correct time where it must appear.

 3-Do a simple process with ffmpeg, for example with command:
 ffmpeg -i TEST1.AVI -c:v libx264 -c:a mp3 TEST2.AVI
 (An error appears at the end, caused by the trimming operation, I don't
 think its critical).

 4-Play "TEST2.AVI" and note that the word "TOKYO" appears at
 t=00:00:25:800, i.e. 2.5 seconds before it should. Compressed video gets

 So there must be a hidden delay in the original AVI file that neither
 '''ffmpeg''' can't see nor '''ffprobe''', as states this ticket.

Ticket URL: <https://trac.ffmpeg.org/ticket/7720#comment:4>
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