This sample demonstrates how to create a QuickTime movie with a video effect as a transition
from one picture to another. This project differs from the QTShowEffect sample code it is based
on in that it allows the user to create the effect "by hand" e.g. without the aid of the standard
QuickTime effects parameter dialog box. Instead, the program itself builds the correct effects
parameter description atoms.
Here's a quick rundown of how the program works:
• First, a QuickTime movie with two video tracks is created - these two tracks will be used as
sources for a cross fade video effect
• The effect description and sample description structures for the cross fade effect are created
• An effects track and media are created and added to our movie for the cross fade effect
• The input map for the effect is created, and references for the two video tracks are added to
this input map
To build the effects movie, simply build and launch the application. At the prompt, specify a location for the movie. The resulting movie, when played with any QuickTime capable player (such as QuickTime Player), will show a smooth alpha blending between the two video tracks.
