For anyone looking at this thread with
Blue Iris and wants to do spotter cams for a PTZ, here you go.
You can use any camera as a spotter camera.
Just set up the triggers to trigger the other cam. Not hard to do in BI.
On the PTZ camera, set up a group containing just that PTZ - it should be the only camera in the group so call it PTZ for example.
In the camera GUI for the PTZ, make a preset(s) for it to move to when triggered which gives the view you want. You can have several spotter cams each triggering a different PTZ preset, but you need to set those up first.
After you are done, redo in BI the find/inspect for the PTZ to ensure it pulls all the presets
On the Trigger tab for the fixed camera, under "When triggered" select "Move to preset" and select the preset number you just created for the PTZ.
Check the Trigger camera group option and hit select and pick the group name the PTZ is in.
Then check the Move to preset and change the number to the preset on the PTZ you want it to move to.
Then check the move camera groups and hit select and then the camera group.
Hit ok and then that fixed cam will call up the PTZ whenever the fixed cam sees motion.
Then when something triggers the fixed cam, it will move the PTZ to the assigned preset. You can use the "Trigger Now" to test.
There are a few other ways to do it as well.
And this works for a non autotracking PTZ as well.
Before I got an autotrack PTZ, I created a poorman's tracking PTZ using clone cameras in BI. My wide angle overview camera was cloned 7 times and I created a zone for different areas of the field of view and then would call up the PTZ to move to the preset number for each of those areas. It wasn't as good as a tracking PTZ, but it worked surprisingly well. As someone would walk up my driveway, the PTZ would follow them just by going to the preset number based on which zone they were in.