Converting FLAC to AAC (or MP3 to OGG etc...)

installation on MacOsX Lion (with homebrew) :

brew install libcdio
brew install lame two-lame mpg123 mp3gain
brew install libogg libvorbis     vorbis-tools  vorbisgain
brew install faac faad2
git clone git://github.com/laurentperrinet/python-audio-tools.git  audio-tools
cd audio-tools
make
make install

using it:

track2track  -t aiff *.flac #lossless
track2track  -q 0 -t m4a *.ogg #lossy

and on a whole folder, placing the files in the same directory:

find a_folder/with/lots_of_flac -name *flac -exec sh -c 'echo "Processing $0"; track2track -t aiff  "$0" -o "${0%.flac}.aiff"' {} \;
find a_folder/with/lots_of_ogg -name *ogg -exec sh -c 'echo "Processing $0"; track2track -t m4a  "$0" -o "${0%.flac}.m4a"' {} \;

tried as a formula in homebrew: https://github.com/mxcl/homebrew but closed it.