for linux:
sudo apt-get install flac
sudo apt-get install lame
for mac:
brew install flac
brew install lame
in mac not necessary set root before
Than, after thta stay in folder that you want convert those files:
for f in *.flac; do flac -cd "$f" | lame -b 320 - "${f%.*}".mp3; done
source: http://www.boback.com/2013/how-to-convert-flac-to-mp3-ubuntu-command-line/
source: http://www.boback.com/2013/how-to-convert-flac-to-mp3-ubuntu-command-line/
