Clip Handles And Transitions; Single- And Double-Sided Transitions - Adobe PREMIERE PRO 2 Manual

Clip handles and transitions

In most cases, you don't want a transition to occur during the essential action in a scene. For this reason, transitions
work best with handles—the extra frames beyond the In and Out points set for the clip.
The handle between a clip's Media Start time and In point is sometimes called head material, and the handle between
a clip's Out point and Media End time is sometimes called tail material.
A B C
A clip with handles
A. Media Start B. Handle C. In point D. Out point E. Handle F. Media End
In some cases, the source media may not contain enough frames for clip handles. If you apply a transition, and the
handle duration is too short to cover the transition duration, an alert appears to warn you that frames will be repeated
to cover the duration. If you decide to proceed, the transition appears in the Timeline panel with diagonal warning
bars through it.
Transition using duplicate frames
For best results with transitions, shoot and capture source media with sufficient handles beyond the In and Out
points of the actual clip duration you want to use.

Single- and double-sided transitions

Transitions are typically double-sided—they combine the last video or audio material from the clip before the cut
with the first material from the clip right after the cut. You can, however, apply a transition to an individual clip so
that it affects only the beginning or end of the clip. A transition applied to a single clip is called single-sided. The clip
can be immediately adjacent to another clip or sitting by itself on a track.
Using single-sided transitions, you have more control over how clips transition. For example, you can create the
effect of one clip departing using the Cube Spin transition, and the next clip fading in using Dither Dissolve.
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