Framerate (fps) definition
Rate of the speed of a frame, that is, the number of images (frames) contained in one second of video. When the human eye sees 10 to 12 consecutive images per second, it perceives the images individually, but when the number of frames is greater, the eye perceives the images as if they were moving. The NTSC system uses a frame rate of 29.97 fps and the PAL system of 25 fps.