Extract audio from video with FFMPEG but not the same duration

Question

My problem is that i need to extract with FFMPEG the audio contained in a video with the same duration. But for some files that i tested, the audio's duration is sometimes shorter than the video's duration. I need to have the exact same duration between the audio and the video file.

The command that i have already tried is this following:

ffmpeg -i input_video.mp4 output_audio.wav

How can i fix this with options in my command ?

Not a programming question - try http://superuser.com ? – Paul R Mar 25 '15 at 16:33 — Paul R, Mar 25 '15 at 16:33
Is padding the audio stream with silence acceptable? – aergistal Mar 25 '15 at 16:44 — aergistal, Mar 25 '15 at 16:44

score 5 · Answer 1 · answered Mar 25 '15 at 19:36

5

I found the solution. To get an audio extract with the exact same length. I use the option -async 1 like this:

ffmpeg -i input_video.mp4 -async 1 output_audio.wav

answered Mar 25 '15 at 19:36

Thomas Melcer

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I tried this option but I still see duration does not match. The gap closed but there is still difference. Any suggestions? – Cihad Turhan Mar 13 '21 at 18:11

Extract audio from video with FFMPEG but not the same duration

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