Extracting audio from video using ffmpeg

To extract audio from a video, here is the command

$ ffmpeg -i video.mp4 -q:a 0 -map a audio.mp4

whereby we supply the name of our video to using -i and put the name of the audio file at the end of the command.

If we want to extract only some part of the audio from the video, we can use below command

$ ffmpeg -i video.mp4 -ss 00:03:00 -t 00:00:45.0 -q:a 0 -map a audio.mp4

where -ss is the start time of the video, that we want to extract, and -t is the duration of how much time we want to extract from the -ss time. In the above example, the output will be an audio extract from a video called video.mp4, starting from the third minute, until 45 seconds after the third minute.