[Re: Mp3 from Radio]

[fs ck]

I think adding transcoding to getiplayer is probably unwise because
everyone has their preferred transcode options (e.g. like output
bitrate, and even the 'libmp3lame' codec name changes between ffmpeg
builds) and the number of options you'd have to add to satisfy even a
few users is going to get out of hand!
I believe the --command option you specified was created for this very purpose.

Also, you can use the below command instead the one you suggested and
it will limit the conversion to only those files ending in '.aac'.

 -c 'ffmpeg -i "<dir>/<fileprefix>.aac" -vn -acodec libmp3lame -ac 2
-ab 128k -y "<dir>/<fileprefix>.mp3"'

See: http://linuxcentre.net/getiplayer/documentation#Substitution%20Parameters