inPoint

The in point of the layer, expressed in composition time seconds .Floating-point value in the range [-10800.0..10800.0] minus or plus three hours ; read/wri

importPlaceholder()

Creates and returns a new PlaceholderItem object and adds it to the projectメs items array. Same as the File > Import > Placeholder command.name A string con

startTime

The start time of the layer, expressed in composition time seconds .Floating-point value in the range [-10800.0..10800.0] minus or plus three hours ; read/w

addKey()

Adds a new keyframe or marker to the named property at the specified time and returns the index of the new keyframe.time The time, in seconds, at which to a

duration

Returns the duration, in seconds, of the item. Still footage items have a duration of 0.ユ In a CompItem, the value is linked to the duration of the composit

nearestKeyIndex()

Returns the index of the keyframe nearest to the specified time.time The time in seconds; a floating-point value. The beginning of the composition is 0.Inte

frameDuration

Returns the lengthof a frame for this AVItem, in seconds. This is the reciprocal of frameRate. When set, the reciprocal is automatically set as a new frameR

setValueAtTime()

Sets the value of a keyframe at the specified time. Creates a new keyframe for the named property, if one does not currently exist for the specified time, a

audioActiveAtTime()

Returns true if this layer’s audio will be active at the specified time.For this method to return true, audioEnabled must be true, no other layer with audio

setValuesAtTimes()

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