Video is a series of still images that give the appearance of motion when viewed in order at a certain speed. Each of those images is called a “frame.” Frame rate, then, is the speed at which those images are shown. It’s usually expressed as “frames per second,” or FPS. So if a video is captured and played back at 25fps, each second of the video shows 25 different still images. The human eye can see the difference. 10 to 12 frames per second are perceived as single images. The human eye interprets the displayed images as motion when the frame rate is higher.

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