I got ManyCam to use the Virtual Webcam driver on my Mac for my IP Camera. Because the OBS source would freeze if the rtsp stream froze.
Turns out ManyCam is doing the same thing. If the rtsp stream hiccups, then it never recovers in ManyCam. Perhaps you need to add some kind of heartbeat / keepalive that refreshes the stream every so often? That might solve this whole problem! Otherwise, it’s the one thing I need, and I’ll just have to get a refund.