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Wikipedia says that Flash allows "bidirectional streaming of audio and video". Is it possible to do that with other technologies (for example with JavaScript)?

In other words, I want to transfer video from one user of web-site to another one in real time.

I want to have something that is already installed by many users or easy to install (Flash fulfills this requirements). And I want to have something free.

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Why not just use Flash? –  David Rickman Jun 5 '10 at 12:06

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Flash is probably going to be your best bet since it is already installed for the vast majority of web users and it already supports the technology you're working with (webcams, microphones, audio/video streams, etc.).

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huh? "direct user-to-user connections will be essentially impossible if you're using Flash" what are you saying? flash provides p2p communication for audio and video streams; central server is used only to bootstrap it. this is how [now exploding] number of audio/video chat websites uses it; they do not re-transmit all the streams - that would be overkill; newteevee.com/2008/12/04/… –  pQd Jun 6 '10 at 6:31
I stand corrected on that point. I wasn't aware Flash had that particular capability. –  Justin Scott Jun 6 '10 at 13:43

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