Operation Manual

Overlay clips 149
Using video masks with overlay clips
A video mask is an animated way to reveal the content of an overlay
clip. It is similar to a transition in function. You can apply an existing
video mask, create and import your own video mask, or import a third-
party video mask.
A video mask is a creative way to reveal the underlying
content.
There are many ways to make your own video masks. For example,
start a new project, and from the
Graphics category in the Library, add
a black color swatch and a white color swatch to the Timeline. Apply a
transition and match the duration to the two swatches. Save your work
to a video file (such as MPEG 4, AVI, or MOV). You can then import the
file as a video mask.
To apply a video mask to an overlay clip
1 In the Timeline, select an overlay clip.
2 Click Mask & Chroma Key in the Attribute tab.
3 Click Apply Overlay Options then choose Video Mask from the
Type drop-list.
4 Select a mask.
5 Watch the Preview Window to see how the new settings affect
the image.
To import a video mask
1 In the Timeline, select an overlay clip.