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the cross-fading will be done in a smooth interpolating fashion and varied time/
volume values.
After specifying the option, every time your audio clips overlap, a default auto
cross-fade will be created between them.
Unchecking the Apply auto audio cross-fade box disables the auto cross-fade.
In this case, the overlapping segments between audio clips will remain as they
were, the clips' ends will be simply merged. If you listen to the transition, you will
hear both of the clips playing at the same time.
Using key frame controls in dialog boxes
Key frames are frames in a clip where you can specify a different attribute or
behavior for an applied effect. Use key frames to customize how an effect
progresses from the beginning to the end of a clip. All of the effects in Video
Editor can be controlled with frame-by-frame precision using key frames.
The Key Frame Controller can be found in the following: all Video and Audio
Filters, Moving Path, Transition dialog boxes, Overlay Options dialog box and
Speed dialog box.
As an example, the procedure below uses the Circle-Wipe transition effect dialog
box to create a customized transition animated with key frames.
To use key frames to animate a transition effect:
1. Place two clips on a single video track, make sure the clips overlap.
2. From the Wipe folder in the Production Library under Transition Effect,
drag the Circle-Wipe thumbnail into the overlapping area.
3. In the Circle-Wipe dialog box, drag the slider on the Key
frame Controller about one-third of the way down.
4. Click the Add Key frame button
5. Drag the Transition degree slider to approximately 75%.
6. Go back up to the Key frame Controller and drag the slider about two-thirds
of the way down. Click the Add Key frame button.
CHAPTER 4: ADDING EFFECTS AND TITLES 103
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