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CHP. 15 ADDING VIDEO TRANSITIONS AND MOTION
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Adding new track keyframes
You can add new track keyframes to an existing track-level effect by double-clicking the track keyframe area.
Editing track keyframes
Double-click a track keyframe to open the associated window and adjust the settings. To change a keyframe
interpolation curve, right-click the keyframe and choose a curve type from the shortcut menu.
Locking track keyframes to events
When track keyframes are locked, you can move events along the track and the keyframes move along with
them. Only keyframes that occur within the selected events move.
Select the Lock Envelopes to Events button ( ) to lock track keyframes to the events on the track.
Hiding track keyframes
If track view becomes too cluttered, you can hide track keyframes from view. From the View menu, choose
Show Video Envelopes, and choose Track Keyframes from the submenu to hide track keyframes.
Sample uses for keyframe animation
The following section provides several examples of how keyframe animation can be used with features such
as event panning and cropping, video effects plug-ins, and generated text events.
Animating event panning and cropping
You can combine event panning and cropping tools with keyframe animation to create several special
effects. For more information, see Cropping video on page 223.
Zooming in on a still image
By using keyframe animation in the Event Pan/Crop window, you can zoom in and out on a still image. In
this example, four keyframes are used to zoom in on faces in an old photograph and zoom back out again. A
generated color gradient event masks the edges of the image during the zoom to enhance the effect. For more
information, see Using generated media on page 247.
1.
Click the Event Pan/Crop button ( ) on the still image event.
2.
Click the keyframe controller to position the cursor for the second keyframe.
3.
Click the Add Keyframe button ( ). Resize and move the selection area to zoom in on a portion of the
image.
4.
Click the keyframe controller to position the cursor for the third keyframe.
5.
Click the Add Keyframe button ( ). Resize and move the selection area to zoom in on a different portion
of the image.
6.
Click in the keyframe controller near the end of the event to place the final keyframe.
7.
Click the Add Keyframe button ( ).
8.
Right-click in the selection area and choose Restore from the shortcut menu. The selection area is zoomed
out to include the full image for the last keyframe.