ffmpeg mp3 to mp4 code example

Example 1: ffmpeg video to mp3

ffmpeg -i "file.mkv" -vn -ar 44100 -ac 2 -ab 128k -f mp3 "file.mp3"

Example 2: ffmpeg m4a to mp3

ffmpeg -i input.m4a -c:a libmp3lame -q:a 8 output.mp3