I hear you, but on the other hand, I'd take a bit of interop pain over supporting genocide any day. It looks like with the hints from moonlighter and from https://github.com/keshavdv/unifi-cam-proxy I'll be able to get this to work.

Honestly it might be less work than some other cameras that (allegedly) speak RTSP. You'd be shocked how low-quality these implementations are. Never advancing timestamps, setting the RTP MARK bit arbitrarily, writing uninitialized memory framed as audio packets (on cameras that don't have microphones), closing file descriptors then writing data to them anyway (and so having it show up on the next accepted connection to be assigned that fd even pre-auth), etc.