Inside Macintosh: QuickTime /

Chapter 4 - Movie Resource Formats / Overview of the Movie Resource Atom

Clipping Atoms

Clipping atoms specify the clipping regions for movies and for tracks. Figure 4-13 shows the layout of clipping atoms.

Figure 4-13 The layout of a clipping atom

You define a clipping atom by specifying these elements:

• Size. The number of bytes in this clipping atom.
• Type. The type of the data in this clipping atom (defined by the 'clip' atom type).
• Clipping region atom. Described in the next section.