If a camera streams works with VLC, it should work with Digital Barriers' SmartVis Face Identifier 1.0.4.x .
If you are having issues with adding your camera, once you have verified it in VLC - please start by verifying that the IP address, Username and password have been added correctly into the RTSP stream URL, as well as checking that the RTSP URL is correctly formatted.
There is a corner case for some cameras which do not provide sufficient response to Identifier within a given period. In the event that you suspect this is the case, please alter the time-out delay by adding "?maxDelayMs=60000" (for 1 minute) at the end of your URL. If you already have used some other parameters in your URL, please try "&maxDelayMs=60000".