Can Adobe Air build multiple live video chat and whiteboard application?

Question

Can Adobe Air build multiple live video chat application? and
whiteboard like MSN whiteboard?
Is there any online documentation?

Answer 1

1) any practical use of P2P multicast will have a delay measured in seconds. it shouldn't go to 30 seconds unless you have a large NetStream.bufferTime.
2) i strongly recommend against changing the multicast stream parameters. they all interact with each other. decreasing the window duration will decrease the effective reliability of the stream, by reducing the amount of time to receive all of the fragments of the stream as they pass through the P2P group -- especially when people join or leave the group, which can disrupt the low latency "push" trees that are constructed in the group.
3) you should be able to change the encoding parameters on the fly without a major disruption. are you using H.264 or Sorenson Spark?  it's possible that your camera doesn't like to have its capture size changed and it is freezing temporarily.  i'm not having any trouble changing the capture size with my camera (and using H.264).  i recall there being some issue with changing the frames-per-second on the fly (at least some time ago, and i don't remember what the issue is) -- there was enough of an issue that i disabled it in my little app while actively publishing.