Hi there,
If you know the URL for the rtsp source you can add the camera using the tab for Custom URL.
rtsp://username:password@cameraIP:554/………………………
To connect to Netcam Studio you use the URL
http://username:password@NCS-IP:8100/live/0
for the first camera. Have a look at this guide and the last two postings
How to connect one NCS server with another NCS server Output format is MPEG4 for video and audio.
-Henrik