For anyone having the same issues: It turns out that the above code uses too little CPU load and therefore does not shoot up the frequency. When I checked, my CPU was constantly running at 700 Hz. To achieve the required FPS on the above resolution, I changed my cpufreq governor from ondemand to performance. This might not be the only or the best solution, ...
The pigpio library lets you control the GPIO of one or more networked Pis from a laptop. The laptop may be Windows, Mac, Android, or Linux based - in fact it can run any operating system as long as it can run Python. The pigpio Python module allows control of the remote GPIO.
pigpio will let you properly control servos. It provides hardware timed PWM (...
Face tracking using laptop usb cam, opencv and dlib
Face motion signal from laptop to Rpi to use GPIO to move servo motors.
Is this config OK?
I think it is a good use of laptop and Rpi. To know more about how to
use Rpi's PWM GPIO pins to move servo motors, you might like to read
my answer in the following post.