---
title: Payload data
framework: quicktime-file-format
role: symbol
role_heading: Data field
path: quicktime-file-format/sample_group_description_atom/payload_data
---

# Payload data

A 16-bit signed integer giving the roll distance.

## Mentioned in

Representing encoder delay explicitly

## Overview

Overview Set to -1 value for AAC audio.

## See Also

### Data fields

- [Size](quicktime-file-format/sample_group_description_atom/size.md)
- [Type](quicktime-file-format/sample_group_description_atom/type.md)
- [Version](quicktime-file-format/sample_group_description_atom/version.md)
- [Flags](quicktime-file-format/sample_group_description_atom/flags.md)
- [Grouping type](quicktime-file-format/sample_group_description_atom/grouping_type.md)
- [Default length](quicktime-file-format/sample_group_description_atom/default_length.md)
- [Entry count](quicktime-file-format/sample_group_description_atom/entry_count.md)