Frame rate, or frame frequency, is the frequency (rate) at which an imaging device produces unique, consecutive images called frames.
Frame rate is most often expressed in frames per second (fps). The video playback rate for a video file directly relates to the perceived smoothness of its playback. The higher the number of frames playing per second, the smoother the video playback appears to the user.
Lower rates result in a choppy playback (as a reference point, film uses 24 frames per second to allow the viewer to perceive smooth playback).
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