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

FFmpeg trac at avcodec.org
Sun Feb 10 01:06:02 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 cehoyos):

 Replying to [comment:4 DCTing]:

 > 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

 The conversion needs `-async 1` (or an equivalent audio filter) because
 audio is ''missing''. Are you sure that the avi header explicitely
 contains the delay?

Ticket URL: <https://trac.ffmpeg.org/ticket/7720#comment:5>
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