When you use Search in archive, the video parameters must meet the same requirements as for detection tools.
In addition, there is a dependence of the minimum and maximum allowable speed of object movement in the video image on the camera frame rate:
The maximum speed depends on the size of an object. The following table shows the dependence of the maximum allowable speed on the frame rate for typical objects—human and car:
Frame rate
Maximum allowable speed of a human
Maximum allowable speed of a car
6 FPS
5 km/hr
40 km/hr
12 FPS
10 km/hr
85 km/hr
25 FPS
20 km/hr
170 km/hr
So if it is necessary, for example, to detect people moving at a speed of up to 10 km/hr, it is sufficient to record at 12 FPS.
- The minimum speed of object movement must be such that the object image shifts by at least 1 pixel per frame.