
With the introduction of sound in films, filmmakers felt the necessity for a consistent frame rate, and 24 frames per second became the preferred option. This motion is what makes comedies like Charlie Chaplin's so funny. Anything below this threshold gave the brain the impression of a sequence of separate pictures. Early filmmakers and animators developed techniques to produce a motion perception between 12 and 16 frames per second through trial and error.

The majority of silent films were shot at 16 to 18 frames per second and projected at 20 to 24 frames per second. The motion of a video varies depending on the number of frames per second selected during shooting and playback, including regular speed, slow motion, time-lapse, and more. In other words, the frame rate refers to the number of individual still images displayed on the screen in a second.Ī movie of 24 frames per second, for example, presents 24 independent still images every second. These different pictures appear to move when shown sequentially on a screen.

The time takes for a series of still photos to appear on the screen, "frame rate" refers to this (frames per second or FPS).
