>>20536494 TYB

Batch Extract audio from mp4 videos and save as .mp3 audio

for vid in *.mp4; do ffmpeg -i "$vid" -vn -acodec libmp3lame "${vid%.mp4}.mp3"; done

https://askubuntu.com/questions/221026/how-can-i-batch-extract-audio-from-mp4-files-with-ffmpeg-without-decompression