Ulead MEDIASTUDIO PRO 7, User Manual

Page: 188 / 436

MEDIASTUDIO PRO USER GUIDE 188
Using key frame controls
Key frames are commonly used in computer animation to specify an
animation sequence. Instead of drawing every frame of animation, the user
can specify the starting and ending positions of a sequence, and the com-
puter then generates all of the intervening frames automatically. All of the
effects in Video Editor (as well as those in Video Paint and CG Infinity)
can be controlled with frame-by-frame precision using key frames.
Note: Key frame Controllers can be found in the following: all Video Filter, Moving
Path, and Transition dialog boxes, the Overlay Options dialog box, Speed dialog box
and the Time Control panel of CG Infinity.
Each dialog box containing key frame controls is a bit different. The proce-
dure 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 a clip in the Va track and another in the Vb track, making sure the
clips overlap.
2. From the Wipe folder in the Production Library under Transition
Effect, drag the Circle thumbnail into the Fx track bridging the overlap.
3. In the Circle-Wipe dialog box, drag the slider on the Key frame Con-
troller 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.
7. Drag the Transition degree slider to approximately 25%. Preview the
effect.
You should have a circle that expands, contracts, and then expands out again
to complete the transition. See the next page for an illustration.