---
title: Type
framework: quicktime-file-format
role: symbol
role_heading: Data field
path: quicktime-file-format/track_matte_atom/type
---

# Type

A 32-bit integer that identifies the atom type.

## Overview

Overview This field must be set to 'matt'.

## See Also

### Data fields

- [Size](quicktime-file-format/track_matte_atom/size.md)
- [Compressed matte atom](quicktime-file-format/track_matte_atom/compressed_matte_atom.md)