---
title: Sample description table
framework: quicktime-file-format
role: symbol
role_heading: Data field
path: quicktime-file-format/sample_description_atom/sample_description_table
---

# Sample description table

An array of sample descriptions.

## Overview

Overview While the exact format of the sample description varies by media type, the first four fields of every sample description are the same. important: When parsing sample descriptions in the ‘stsd’ atom, be aware of the sample description size value in order to read each table entry correctly. Some sample descriptions terminate with four zero bytes that are not otherwise indicated. These four fields may be followed by additional data specific to the media type and data format. See Media data atom types for additional details regarding specific media types and media formats.

## See Also

### Data fields

- [Size](quicktime-file-format/sample_description_atom/size.md)
- [Type](quicktime-file-format/sample_description_atom/type.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)