Hi I would be interested in knowing how far you have got with this development?
As I have just bought a Roku only to find it doesn’t support the BBC Radio 4 outside the UK. So the only way I can see it working is to do as you are suggesting. As it’s available quite readily as a Real Player feed.
Unfortunately I am completely a novice w.r.t. Firefly and Roku and still haven’t found out how to even create a Radio file on the Firefly never mind transcode it.
So I would be interested in any feedback in your project.
Rgds
Gday
NSLU2/MacBook Pro/ Roku