[FFmpeg-trac] #5290(avcodec:closed): FFMPEG adds delay when converting into WAV

FFmpeg trac at avcodec.org
Sat Mar 5 15:05:55 CET 2016

#5290: FFMPEG adds delay when converting into WAV
             Reporter:  xtemp09     |                    Owner:
                 Type:  defect      |                   Status:  closed
             Priority:  normal      |                Component:  avcodec
              Version:  git-master  |               Resolution:  duplicate
             Keywords:  aac         |               Blocked By:
             Blocking:              |  Reproduced by developer:  0
Analyzed by developer:  0           |

Comment (by JEEB):

 Similar end result, but the last comments there are most probably off
 regarding iTunes-specific metadata in MOV-derivatives in #2325 .

 Libavcodec should nowadays be pushing out negative timestamps (which is
 correct, and visible by the nonzero start time), but with output formats
 that cannot handle negative timestamps either libavformat or ffmpeg cli
 moves the first packet to position zero (at least that was the end of the
 last technical discussion I had on this). That then leads to this effect
 of all samples being output instead of just those having timestamps >=0.

Ticket URL: <https://trac.ffmpeg.org/ticket/5290#comment:5>
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