@mawa 

I had some trouble to make PTZ work, it works with ONVIF, its a fact, but only if you configure the camera stream through ONVIF also,

So instead of conecting to the camera with: rtsp://(user):(password)@(IPADDRESS):554/stream1

You should connect as: http://(IPADDRESS):2020/onvif/device_service

And then on the PTZ tab you select the ONVIF option, configuring only the 2020 port, and it should work.

It worked for me this way, good luck.