Returns the Double value for the extrapolation before the clip. The ExtrapolationBefore value determine how a clip contributes to the animation before the frames on which it is defined. The different methods of extrapolation are available from the TimeControl.ExtrapolationAfterType property, so this value sets the number of extrapolation units.

For example, if the type is a hold, then the value is interpreted as the number frames to hold; if the type is a cycle, then the value is interpreted as the number of times to repeat the clip; if the type is a bounce, then the value is interpreted as the number of times to repeat the clip forward and backward.

On the Time Control property editor, this value appears on the Extrapolation tab.