How can you use one NetStream to publish video and audio from another NetStream in AS3?

Let's say one of your client programs in AS3 is able to receive live video and audio from a NetStream and play it on the screen. How could you make it also take that video/audio stream that it's receiving, copy it over into another NetStream, and publish it elsewhere? I need to know how to do with this regardless of whether RTMP, RTMFP, or some mixture is involved. The reason why the stream needs to be relayed this way is a real long story, but it's necessary in this particular case. Thanks!

RTMP is TCP, which has higher overhead and latency because it guarantees packets are delivered (handshaking, causing latency and overhead). It also doesn't allow you to share connections directly between clients forcing the server to do all the work.
RTMFP uses UDP, which is a choice protocol for streaming video because it's the opposite. It's lossy which decreases latency and overhead from no retransmissions and most importantly (in some applications) allows you to connect directly from one Flash Player to another Flash Player (p2p) so the server overhead is dramatically reduced. The server is only required to negotiate the initial connection and then it's up to the clients to continue to facilitate that.
How you code your one to many or many to many relationship broadcast network will be based entirely on which of those you choose.
URLStream is very common to use in p2p. Here's an older Adobe article on p2p and an alternate quick old video tutorial (FP10) as a quick simple example of p2p over RTMFP you can view the source of.

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