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Chapter 2 Working with Media
130
Key menu Determines how the movie’s alpha information is used.
The options include:
NoAlpha. Ignores the movie’s alpha channel and makes
the image 100% opaque.
Straight Alpha. Displays the portion of the image
defined by the alpha channel.
The image portion where the alpha channel is black (0
pixels) is transparent.
The image portion where the alpha channel is white
(255 pixels) is opaque.
The image portion where alpha channel levels are
gray display intermediate levels of transparency.
Premultiplied Black. Movies whose alpha channels are
premultiplied with solid black.
Premultiplied White. Movies whose alpha channels are
premultiplied with solid white.
n
If your movie file’s alpha channel is premultiplied
with a color other than white or black, set the
Alpha Channel to Straight Alpha and use the
Premultiplied Alpha Key filter to remove colored
edges after the file is imported.
For information, see Keys and Matte Filters on page 273.
Flip Image menu Lets you flip the image. The choices include:
Never. Leaves the image unchanged,
Horizontal. Flips image horizontally.
Vert ical. Flips image vertically.
H + V. Flips the image both horizontally and vertically.
Start Time Determines the starting time of the movie file, in frames.
Drag the Face track in the timeline to the appropriate
frame. When you stop dragging, the Start Time display
updates.
Clip Head Sets a number of frames to clip the head of the movie.
A Mark In appears in the Face track in the timeline at the
frame where the movie begins.
Options Description
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