create virtual webcam from RTSP or another webcam streaming protocol

The idea is to capture in a second computer the webcam and sound streaming from the first computer, and convert it into a virtual webcam so it can be retransmitted for the use of other applications. For example imagine you are in computer A and connect using teamviewer to computer B. Now you want to make a skype call in computer B but you want to show your webcam that is in computer A.