Inside Macintosh: QuickTime /

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

Edit Atoms

You can use edit atoms to define the portions of the media that are to be used to build up a track for a movie. Figure 4-15 shows the layout of an edit atom.

Note

If the edit atom or the edit list atom is missing, you can assume that the entire media is contained in the track.

Figure 4-15 The layout of an edit atom

You define an edit atom by specifying these elements:

• Size. A long integer that indicates the number of bytes in this edit atom.
• Type. A long integer that indicates the type of the data in this edit atom (defined by the 'edts' atom type).
• Edit list. The edit list atom that contains the edit list information, described in the next section.