[FFmpeg-trac] #11330(ffmpeg:new): When recording, audio duration is shorter by the time it takes to spin up the video

[FFmpeg]

#11330: When recording, audio duration is shorter by the time it takes to spin up
the video
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             Reporter:  chuckwoodchuck  |                    Owner:  (none)
                 Type:  defect          |                   Status:  new
             Priority:  important       |                Component:  ffmpeg
              Version:  unspecified     |               Resolution:
             Keywords:  pulseaudio      |               Blocked By:
             Blocking:                  |  Reproduced by developer:  0
Analyzed by developer:  0               |
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Comment (by chuckwoodchuck):

 Replying to [comment:2 Balling]:
 > Does it happen on flac?
 No it does not. I tried multiple audio output formats in separate tests,
 the trimmed tail is of the same length in all cases.
 >
 > >What's strange is that the audio is cut from the end, not the beginning
 (that is, the audio that is played while codec is starting is NOT lost -
 the lost part is the tail
 >
 > That is not strange, we support editlist for aac in the beginning. So
 the added silence from the start is removed.
 To clarify - assuming the recording started at 10:00:00, video codec took
 3 seconds to begin its operation, and "q" was hit at 10:00:10, the audio
 portion in the final file comes from 10:00:00 to 10:00:07, and not from
 10:00:03 to 10:00:00. So even though the recording was still going between
 10:00:07 and 10:00:10, and the portion from 10:00:00 to 10:00:03 is
 present, last 3 seconds are discarded.
-- 
Ticket URL: <https://trac.ffmpeg.org/ticket/11330#comment:3>
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