QuickTime 3 Reference
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The QuickTime 3 SDK includes over 145 transitions, and with QuickTime's extensible architecture, you can easily add many additional effects. Each effect has a set of parameters that controls how the effect appears at runtime. You need a way to choose an effect and specify appropriate values for its parameters.
To do this, you create an effect description which selects the effect from the available range, and set its parameters to produce the exact effect you require.
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