How to Join N live MP3 streams into one using FFMPEG?

How to Join N live MP3 streams (radio streams like such live KCDX mp3 stream http://mp3.kcdx.com:8000/stream ) into 1 using FFMPEG? (I have N incoming live mp3 streams I want to join them and stream out 1 live mp3 stream) I mean I want to mix sounds like thay N speakers speak at the same time (btw N stereo to 1 mono), please h开发者_开发问答elp.

BTW: My problem is mainly how to make FFMPEG read from stream not from file... Would you mind giving some code examples, please.

It looks like url_fopen(), defined in avio.h, is the function you are looking for.