Clock Components

Overview

This chapter discusses clock components. Clock components provide timing information. In QuickTime, the Movie Toolbox is the primary client of clock components. Applications seldom call clock components directly. However, you may want to develop your own clock component for use by the Movie Toolbox. Therefore, this chapter focuses on what you must do to create a clock component.

Before learning about clock components, you must be familiar with QuickTime time bases. See the chapter "Movie Toolbox" in Inside Macintosh: QuickTime for a complete description of time bases and of the Movie Toolbox functions that support time bases.