Cutting streams into 15minutes segments

Hi

I'm not sure how to instruct transcode to create 15minutes segments
(separate files) from a stream.

I can record my stream using this command:

arecord -c 2 -f dat -D hw:1,0 foo.wav

Now, I'd like to pipe arecord output to transcode so it creates
15minutes long mp3s in a format stream0001.mp3, stream0002.mp3,
stream0003.mp3 ....

Any help appreciated
Ralph