One could likely automate that with a perl script. Though it should be quite slow on a NSLU. I have something in mind like a directory structure of
/musik/lossless –> used by mt-daapd1
/musik/mp3 –> used by mt-daapd2
Then one would only have to add the flacs/alacs and after a while the mp3s pop up automatically on the other mt-daapd instance. 😎
After all there is a high quality encoder with lame, that is open source. I tried it out once. Worked on the NSLU, but was hell slow of course. LOL* Really slow. You can count it in hours.