Frame rate is the number of images (“frames”) taken per second in a video. It is important to note, that in a single camera, increasing the framerate (less time between images) means a shorter maximum shutter speed, as the shutter must open and shut for each frame to be recorded. To apply the framerate, the time between images is simply 1/framerate. For example, if there are 30 frames per second, then a frame is taken every 1/30 seconds or .033 seconds. See Pixel for using this framerate to identify displacements. With the displacement, the velocity may be found as the displacement divided by time.
Author: Jack Elliott
Date Published: June, 2022