I believe that you did not understand that it thinks that you will ask if you are going to build it, it takes months of design and development.
If you are looking for a webcam web chat, you might understand why I'm saying this.
For example, this http://www.ivideochat.com/ site has developed a program for this reason. See how difficult it is, how many people think.
In addition, you did not say which platform you are using, which server you are going to split the video channels and send them to each other, are you going to use it one to one or all for all? are you going to build it on asp.net? on linux, on flash, what for?
A few times the little ones think in words, are too big to develop.
So, for me you have to define a lot of thought, and then maybe you will see if you can do it.
1 . Multimedia server multimedia? example http://www.adobe.com/products/flashmediaserver/
2 . Platform development.
3 . The number of possible users.
4 . The way they connect interact with each other.
5 . Do they all have to have a camera?
6 . What about bad users (who show that they think badly)?
7 . Are they going to chat too?
Think about all this in the first place, then, perhaps, it will become clearer to you what you are going to receive.
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