Car Speed Detection

[Nickleaton]

Given a car is detected, and two frames separated by a known time, pixels moved you get a measure of speed.
However, that is not a real speed.
So how could you calibrated the measurement in an easy way?
You go out in a car, travel at a known speed over that route. Then you go back see what the two frames says. That gives you a scaling factor to give the speed of cars or other vehicles.

Detection -> Two Frames -> pixels moved / time -> Speed.

Even without the calibration you get a distribution of speed. Tells you if there is a speeding issue in general.

[hawkeye217]

Speed estimation is already supported: https://docs.frigate.video/configuration/zones/#speed-estimation