[FFmpeg-trac] #8489(ffmpeg:new): MP4 file has too short audio

FFmpeg trac at avcodec.org
Wed Jan 29 20:58:47 EET 2020

#8489: MP4 file has too short audio
             Reporter:  mkoch       |                    Owner:
                 Type:  defect      |                   Status:  new
             Priority:  normal      |                Component:  ffmpeg
              Version:  git-master  |               Resolution:
             Keywords:              |               Blocked By:
             Blocking:              |  Reproduced by developer:  0
Analyzed by developer:  0           |

Comment (by mkoch):

 Here is a simpler example for reproducing the problem, only two steps are

 ffmpeg -f lavfi -i testsrc2=size=vga -f lavfi -i sine=1000 -t 6 -y

 ffmpeg -i video.mp4 -i video.mp4 -filter_complex
 "[0:a][1:a]amix=weights='1.0 0.1'" -y out.mp4

 You can hear that the audio from the first input ends too early at 4s. But
 both input files are the same and have 6s audio.

Ticket URL: <https://trac.ffmpeg.org/ticket/8489#comment:1>
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