QuickTime 3 Reference
This chapter introduces you to QuickTime video effects, which are new in QuickTime 3. You can use "real-time" video effects to control the visual transition between two sources. Sources can be frames of a QuickTime movie, or they can be GWorlds containing an arbitrary image. You can also use effects to visually "filter" a single source, applying a visual effect to a single image.
Because visual effects are calculated and executed at runtime, they can be applied between any two time points, even if the exact appearance of a QuickTime movie at a certain time is not known in advance. This means, for example, you can execute effects on sprite tracks, which can change as a result of user interactions.
You need to read this chapter if you are writing an application that creates QuickTime movies and you want to add video effects to those movies. This is explained in the section "Adding Video Effects to a QuickTime Movie."
You should read this chapter if you want to use video effects on GWorlds, without creating a QuickTime movie, as described in the section "Using Video Effects Outside a QuickTime Movie."
If you want to create new video effects of your own, you need to read the section "Creating New Video Effects." In creating QuickTime movies with video effects, you will want to provide the user with ways to choose which effects to apply, when to apply them and how to customize the effects chosen. These topics are discussed in the section "Video Effects User Interface."
This chapter also contains two valuable reference sections:
| Chapter contents | Next |