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Frame rate


    Each composition you create can have its own frame rate. The frame rate is the number of frames the rendered composition produces in every second when played back. The frame rate you use is generally determined by the type of output you will produce. For example, video for NTSC television plays at 29.97 frames per second (fps), and PAL plays at 25 fps.

    When you set up changes over time, After Effects treats the changes as continuous throughout a composition timeline. Each frame is rendered as a slice out of the timeline at the frame rate you specify. Because After Effects treats time continuously, it is possible to change a composition's frame rate at any time or override the frame rate of a composition when you render the final movie. See Setting frame rate.