The PTZ protocol (DH-SD1) is irrelevant to how external applications send PTZ commands to the camera. Don't worry about that.
I too have recently had trouble getting a Dahua PTZ to be fully operational with
Blue Iris. The Network IP camera configuration panel has too many options and you never know which ones matter in which cases. If you're having trouble getting a Dahua PTZ camera to connect, this is how mine is configured. Note there are a lot of settings, particularly in this first screenshot, which matter a great deal. But I think "Discovery/ONVIF port" 80 may be the key to success. If memory serves, this was wildly incorrect by default.
The full "path" value is:
Code:
/cam/realmonitor?channel=1&subtype=0&unicast=true&proto=Onvif