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

# Type

A 32-bit integer that identifies the atom type.

## Overview

Overview This field must be set to 'stsd'.

## See Also

### Data fields

- [Size](quicktime-file-format/sample_description_atom/size.md)
- [Version](quicktime-file-format/sample_description_atom/version.md)
- [Flags](quicktime-file-format/sample_description_atom/flags.md)
- [Number of entries](quicktime-file-format/sample_description_atom/number_of_entries.md)
- [Sample description table](quicktime-file-format/sample_description_atom/sample_description_table.md)