OpenTrack plus AITrack simply locks on to your face.
Yes indeed, I've tried that.
However as a TrackIR 5 user myself, I must say that this solution (which works, no doubt about that) is nowhere near the experience you get from a "true" head tracker system like TrackIR.
In particular, despite fiddling with all kinds of settings, I have never found a sweet spot between lag and jitter. Either your head movement applies with a
noticeable delay, or it keeps shaking a little constantly.
Apparently, AITrack can be supported by wearing a hat with a paper glued to it, showing a black-on-white rectangle to the camera. Didn't try that so far.
Just for the record, my system exceeds all OpenTrack and AITrack requirements
by far:
i7-12700K
48GB RAM
Nvidia RTX 2800 Super
Logitech Brio Webcam (4K @30FPS / 1080p @60FPS / 720p @90FPS, dFOV 90°/78°/65°, additional Infrared-Sensor + Infrared LED)
Mike