Sets values for a set of keyframes at specified of times. Creates a new keyframe for the named property, if one does not currently exist for a specified tim


The duration of the work area in seconds. This is the difference of the start-point and end-point times of the Composition work area.Floating-point; read/wr


The number of times that the footage is to be played consecutively when used in a composition.It is an error to set this attribute if isStill is true.Intege