Adobe 25510629 - After Effects CS3 Professional, Руководство пользователя

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Essential features 15
High-speed GPU keying
Ultra allows users with newer graphics cards (GeForce 5700 and Radeon 9600 or better for
standard-definition video; GeForce 6600 and Radeon 9800 or better for high-definition
video) to dramatically increase rendering speeds by shifting processing to the graphics
processing unit (GPU). Using GPU-based processing, Ultra can typically perform vector
keying in near-real time at HD resolution (depending on system configuration and file types).
High-resolution keying with standard-definition cameras
Ultra offers a Plus-90 mode to allow standard-definition cameras to generate footage for use
in high-definition scenes. Video frames are wider than they are tall, yet human subjects are
taller than they are wide. To make the optimum use of the greatest number of pixels for
shooting a subject, you can rotate your camera 90 degrees, using the longer axis of the frame
as the new vertical axis. This provides an additional 33% of vertical resolution when using a
video format with a 4:3 frame aspect ratio, and an additional 78% of vertical resolution when
using a video format with a 16:9 frame aspect ratio.
Virtual shadows and reflections
You can use Ultra to insert virtual shadows into a scene. You can then adjust the shadow's size,
perspective, and transparency. When using photographic or rendered backgrounds, you can
insert virtual reflections displaying an inverted image of the keyed subject.
Create custom virtual environments
Add your own backgrounds, B sources, and semi-transparent foreground images to create
your own virtual environments, complete with multiple-point pans and zooms. Large, high-
definition custom background images can be explored with complex camera moves.
Support for high-resolution stills
Ultra offers support for high-resolution stills up to 4096x4096 pixels, allowing digital images
to be used as high-definition input sources and backgrounds. With image support for BMP,
JPG, PNG, TIFF, TGA, and PPM files, users can export high-resolution keyed stills for
further editing or output to print or the web.