User`s guide

Chapter 4 Working with Effects and Filters
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Use Source Lets you view a single frame of video associated with your
effect. The program shows the first frame of video throughout
the effect. The still image does not update as your effect moves.
Update Source Lets you to view the actual video on a frame-by-frame basis
while previewing the effect. This slows playback, but allows for
a completely frame accurate preview.
OpenGL Mode Hardware acceleration speeds previews. You can also adjust this
option in the Preferences window. See Setting Your Preferences
on page 137.
Off Disables the OpenGL hardware acceleration, providing the
slowest performance. If you choose Off, the system offers only
software OpenGL acceleration. Select this option if your system
does not include a supported OpenGL card. You can use the Test
OpenGL Hardware button to determine if your system includes a
supported card. See Preview Tab on page 166.
On, no texture caching Enables the OpenGL acceleration but not texture caching.
On, some texture
caching
Enables the OpenGL acceleration and a limited amount of
texture caching. Try this setting if the recommended setting
generates garbage images.
On, Max. texture
caching
Provides the best performance and is the recommended setting.
OpenGL is only used for previews and interaction. OpenGL does
not accelerate the final rendering of images.
Open GL Interactor Allows you to position, scale and rotate tracks. The interactors
appear in the Composite window when you select a track in the
timeline. With the Composite window active, choose the
appropriate option.
Show Interactor Lets you hide or display the interactors.
Translation Interactor Allows you to position the selected object. This default mode is
indicated by arrows at the ends of the interactors.
Rotate Interactor Allows you to spin, tumble and rotate the selected object.This
mode is indicated by circles at the ends of the interactors.
Scale Interactor Allows you to scale the selected object. This mode is indicated
by cubes at the ends of the interactors.
Mark Displays visual cues to help you align items and ensure images
are broadcast-safe. (Face and Media track preview windows do
not display marks.)
Options Description