Вероятно как и у других:
rtsp://<username>:<password>@<ip>:<port>/cam/realmonitor?channel=1&subtype=1
rtsp://admin:admin@192.168.1.123:554/cam/realmonitor?channel=1&subtype=1
rtsp://192.168.1.123:554/cam/realmonitor?channel=1&subtype=0&unicast=true&proto=Onvif