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USING VIDEO FX, COMPOSITING, AND MASKS CHP. 14
Duplicating a generated media event
Once you have added a generated media event and modified its settings, you can duplicate it. For more
information, see Duplicating events on page 103.
When you duplicate a generated media event, you have two options:
• Select the Create a new copy of the source media radio button if
you want the new event to be modified on its own. The new
event is completely independent of the original event.
• Select the Create a reference to the original media radio button
to keep the new event linked to the original generated media
event. Any change to either event is mirrored in the other.
Compositing
Compositing is the process of mixing visual elements together into a final output. In Vegas software, this
means mixing tracks together vertically. Masks, generated text, and chroma keying all involve compositing.
Understanding how compositing works is important to understanding these and many other video track
mixing techniques.
Understanding the parent/child track relationship
The key to understanding overlays, masks, transparency, and compositing is to
understand the parent/child
relationship between tracks. In general terms, the
parent track is the highest track in a group of tracks (often only two) and the
behavior of the child tracks (i.e., how they are composited together) is
determined by the parent track.
You can also produce complex compositing by creating nested parent/child
groups with compositing parents and children at various levels.
When you have multiple levels of parent and child tracks, clicking the Make
Compositing Child button ( ) moves the track in one level and clicking the
Make Compositing Parent button ( ) moves out one level.
Hold while clicking the Make Compositing Child button to move a track
and all its child tracks in one level.
The following three examples demonstrate different compositing relationships.
The first example shows two independent tracks. The top track contains a
generated text event that has a transparent background. The second track
therefore shows through the transparent areas in the Video Preview window.
Since the second track does not have any transparent areas, any tracks below it
would be completely obscured.
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