convert m4a to mp3 in lunux via the command line

ex Lord Neckbeard at SuperUser

http://superuser.com/questions/704493/ffmpeg-convert-m4a-files-to-mp3-without-significant-loss-of-information-quali

$ mkdir mp3
$ for f in *.m4a; do ffmpeg -i "$f" -codec:v copy -codec:a libmp3lame -q:a 2 mp3/"${f%.m4a}.mp3"; done