activeAtTime()

Returns true if this layer will be active at the specified time. To return true, the layer must be enabled, no otherlayer may be soloing unless this layer i

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

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

addCamera()

Creates a new camera layer and adds the CameraLayer object to this collection.The new layer honors the Create Layers at Composition Start Time preference.na