I might be kind of a bonehead here, but I still don't fully get whole vs. half overlap in transitions. Whole overlap I think I understand: if there is a 1-second transition between Clip A and Clip B, then the entire movie is shortened by 1 second. Correct? But I don't understand how half overlap works. Can anyone explain this clearly for me?
iMovie '11
Why not just try them and see? You can always undo it afterwards! 🙂
Of course I've tried that.
Full overlap shortens the movie. Half overlap keeps it the same length. Half overlap works with photos just fine. However, for Half Overlap to work with video clips, you need some "handles". A handle is defined as an unused portion of the clip that is long enough for the transition. If you used the whole clip in your movie, there are no "handles" and you can't use half overlap. If you carefully edited out the portion of the clip where Aunt Edna is picking her nose, that may be in the "handle" and could show up in your transition.
For more, see iMovie Help here.
Oh, right. So it extends the tail of Clip A and the head of Clip B, overlapping the same amount and keeping the movie length the same, right?
Yes. Exactly. If the transition is 1 second, it grabs 1/2 second from the tail of clip A and 1/2 second from the beginning of clip B, assuming that there are some unused frames there.
Wait wha—? I think that's a bit unclear; is this correct?
That is correct according to the diagram. I haven't done extensive testing myself.
I think that would be right, because that way, the overall time remains the same.
Whole vs. half transition overlap?
