Edit Atoms

QuickTime Movie File Format Specification, May 1996

Edit Atoms

You use edit atoms to define the portions of the media that are to be used to build up a track for a movie. The edits themselves are contained in an edit list table, that consists of time offset and duration values for each segment. Edit atoms have an atom type value of 'edts' .

Figure 0-13 shows the layout of an edit atom.

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

Figure 13 The layout of an edit atom

Edit atoms contain the following data elements.

Size: A 32-bit integer that specifies the number of bytes in this edit atom.
Type: A 32-bit integer that identifies the atom type; this field must be set to 'edts' .
Edit list: The edit list atom that contains the edit list information; these atoms are described in the next section.