extract audio

Hi Heres how to extract the audio from a single video file ffmpeg -i infile.mp4 -vn -c:a copy outfile.m4a batch extract audio from video files find -s . -type f -name "*.mp4" -exec sh -c \ 'ffmpeg -i "${0}" -vn -c:a copy "${0%.*}.m4a"' \ "{}" \;