Web conferencing issues, thanks

Hi,
I don't know how many of you have done a web conferencing system using JMF. I'm currently working on it but I have addressed some problems. I'd like to hear your suggestions.
The system uses C/S structure and the client uses WebStart. I tried the RTP solutions provided by Sun but I think they are more suitable for P2P.
1. For the video transmission, I capture the camera every 0.5 minute and save to JPEG photos. Then the photos are uploaded to the server. All the other member clients in the conference room download the photos and restore them into a movie. But in this solution there is time delay. Any better ones?
2. For the audio transmission, I have no idea how to do it...
3. Is it better to use a streaming server? I mean, what is the normal architecture for this kind of system? I've installed Darwin Streaming Server but I can't find a way to communicate with it via JMF. If there are some existing solutions, can you please give me the links or sample code?
4. I find that it looks like flash is more popular is this area. Is it possible to use flash in my Java client side? I read the document of Red5 but looks like the client is mainly web page.
Sorry I know I have too many questions here. I have done the research for almost two weeks but still get blocked. So I hope you can help me out here. Thanks in advance!
Alex in Sweden

The system uses C/S structure and the client uses WebStart. I tried the RTP solutions provided by Sun but I think they are more suitable for P2P.You can certainly use RTP for a client-to-server application. It's suitable for any kind of transport.
1. For the video transmission, I capture the camera every 0.5 minute and save to JPEG photos. Then the photos are uploaded to the server. All the other member clients in the conference room download the photos and restore them into a movie. But in this solution there is time delay. Any better ones?You stream the video via RTP to a server, and that server uses the incoming stream as the source for outgoing streams to all of the participants of the video conference...
2. For the audio transmission, I have no idea how to do it...My proposal for #1 handles audio as well.
3. Is it better to use a streaming server? I mean, what is the normal architecture for this kind of system? I've installed Darwin Streaming Server but I can't find a way to communicate with it via JMF. If there are some existing solutions, can you please give me the links or sample code?You do need a streaming server, but you can easily write your own for this application. It's what I like to call a "bounce server" because it just bounces the stream to whoever wants to see it.
4. I find that it looks like flash is more popular is this area. Is it possible to use flash in my Java client side? I read the document of Red5 but looks like the client is mainly web page.Ummmm, no. Red5 is a good freeware Flash Media Server that's capable of doing this video conference application. Adobe Flex is a free API you can use to develope desktop applications or web applications (and thus you would have a Flash-based application that would be running outside of a web browser, transmitting the A/V to the Red5/Flash Media server)

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