research on video conferencing (Score 1)

I am currently doing my Master thesis on video conferencing on IP based networks. My observations on F/OSS video conferencing applications are: - There are a *lot* of undocumented/abandoned/simply not working applications that pretend to do what you are asking. - The ones that I tried all used a client/server model, to date I haven't found a working P2P application. My research tries to involve the P2P Application Layer Multicast model as well, since IP multicast theoretically works like hell but lacks cross Internet support. I'll keep an eye on the reactions of this article, because I am desperately looking for well-documented, working F/OSS alternatives as well.