Audio Processing Using FFMPEG
source link: https://jdhao.github.io/2021/11/10/ffmpeg_audio_processing/
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Audio Processing Using FFMPEG
Collected tips on audio processing with ffmpeg.
Remove audio from a video
To remove audio from a video file, i.e., muting the video, run the following command:
ffmpeg -i input.mp4 -c copy -an input-silent.mp4
Extract audio from ffmpeg
ffmpeg -i input.mp4 -vn -acodec copy out.acc
-vn: do not use video-acodec copy: copy the audio stream (equivalent to-codec:a copy, see stream specifier)
Extract audio in a time range
ffmpeg -i input.mp4 -vn -acodec copy -ss 00:01:00 -t 30 out.aac
-ss: the start time to process the video, in above case, we start from 1 minute-t: the video duration to process, in this case, we process 30 seconds of video.
There is also a -to option which specifies the stop time to process the video. So the above command can also be written as:
ffmpeg -i input.mp4 -vn -acodec copy -ss 00:01:00 -to 00:01:30 out.aac
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