How to record a webcam stream to a file on the server?

I'm using DarkRift networking free version and I'd like to create a webcam site where people can meet up in chat rooms and see each other on webcam. I don't know how to get the webcam stream from WebcamTexture object and I'm also not really sure how to share that stream with clients.(connected users)

Can anybody help me out here? I'm not sure if i should be saving the stream to a file on the server and each user connects to that file OR what?