ffmpeg : Convert all mp4 files in a folder into mp3 in a new folder

Question

I want to convert all my mp4 files in a folder into mp3 in a new folder I've tried something like:

$ffmpeg -i \*.mp4 -vn mp3/\*.mp3

but it didn't work. It involved an infinite loop and my computer didn't respond anymore. Any solution ? Thanks.

Answer 1

for i in *.mp4; do ffmpeg -i "$i" -f mp3 -ab 192k -vn -ar 44100 -ac 2 aud/"${i%.*}.mp3"; done

• vn: disable video recording during the conversion.
• ar: set audio sampling rate in Hz.
• ab: set the audio bitrate.
• ac: set the number of audio channels.
• -f: format.
• aud: name of the audio folder