Stream video from one iphone to another and back

I want to develop an conference application. It's basically exact the same as Facetime only 开发者_如何学Gowith some extra features.

But how do I make a video chat from one iPhone to another iPhone LIVE like Facetime?

Any ideas?

Thanks in advance!

---

OpenTok is a good way to do it.

Here's the tutorial

You can use the flash builder or just air sdk