create Transition
Creates a new transition, fails if type is unknown.
The created block is standalone until assigned to a clip with setTransition. Once assigned, it is owned by that clip: it is destroyed together with the clip, and the engine also destroys it automatically when the two clips stop being timeline-adjacent on the track (e.g. after a manual gap is introduced).
Return
the created transition's handle.
Parameters
type
the type of transition to create.