I wrote a script that converts a FLAC file to an AAC file, copying over all metadata. Why? Because iTunes doesn't support FLAC files (nor does anything else from Apple) but it's a good format to re-download tracks from.
sudo port install faac flac
For Debian users, you can install them by running:
sudo apt-get install flac faac
You also need a working copy of Perl (should be installed by default).
Download the script and copy it to an appropriate directory. In this example, I will use /usr/local/bin - but you may put it elsewhere (e.g. ~/bin):
unzip convflac.zip sudo mv convflac /usr/local/bin/ sudo chmod +x /usr/local/bin/convflac
To test if it works, type the command convflac:
$ convflac No input flac file Usage: convflac <filein.flac> [fileout.m4a] If no fileout is specified, then filein.m4a will be created
The flac converter is as easy as this:
convflac "my song.flac"
This will convert "my song.flac" in to "my song.m4a". If there is meta information in the flac file, it will also copy that. You can specify the output file as well:
convflac "my song.flac" "aac/my song-converted.m4a"
To convert an entire directory, a simple shell script will suffice:
for i in *.flac; do convflac "$i"; done;
Voila! Your entire directory should get converted to aac.
By default, convflac will sort out most metadata for you. However, you can customise this by editing ~/.convflac.
For example, FLAC files have the metadata tracknumber whilst AAC files call this track. To facilitate this conversion, we use a mutation map:
mutation_tracknumber = track
You can customise any FLAC value in this way - by default convflac will create a couple for you though, so you don't need to worry about track numbers or date meta data.
You can also pass arguments to faac and flac using the codec_faac and codec_flac options respectively. These will overrwrite any used by the script, so take great care with them.
# convflac config file # lines starting with # are comments, everything else is key=value # Codec options - uncomment to make changes to quality settings # Default is -q 300 -w -s for faac, it's recommended you leave flac alone # See man flac and man faac for more info #codec_faac = -q 300 -w -s #codec_flac = -cd # Mutation options (for tags): #mutation_flacname = faacname mutation_tracknumber = track mutation_notes = comment mutation_date = year
The most common problem is going to be the Perl directory. To fix this, type:
This should give you a directory - e.g. /usr/bin/perl - edit the convflac file to put it on the top line, prefixed with a "bang". For example:
This script almost certainly won't work on Windows and probably never will. I don't know enough about how Windows handles data pipes, but I'm going to assume it doesn't do it very well if at all.