Data references
An array of data references.
Overview
Each data reference is formatted like an atom and contains the following data elements.
- Size
A 32-bit integer that specifies the number of bytes in the data reference.
- Type
A 32-bit integer that specifies the type of the data in the data reference. The table below lists valid data reference type values.
- Version
A 1-byte specification of the version of the data reference.
- Flags
A 3-byte space for data reference flags. There is one defined flag,
Self reference, which indicates that the media’s data is in the same file as the movie atom. On the Macintosh, and other file systems with multi-fork files, set this flag to1even if the data resides in a different fork from the movie atom. This flag’s value is0x0001.- Data
The data reference information.
The currently defined data reference types that can be stored in a header atom are as follows:
Data reference type | Description |
|---|---|
| Data reference is a Macintosh alias. An alias contains information about the file it refers to, including its full path name. |
| Data reference is a Macintosh alias. Appended to the end of the alias is the resource type (stored as a 32-bit integer) and ID (stored as a 16-bit signed integer) to use within the specified file. This data reference type is deprecated in the QuickTime file format. This information documents existing content containing |
| A C string that specifies a URL. There may be additional data after the C string. |