---
title: "MPEG-4 elementary stream descriptor atom  ('esds')"
framework: quicktime-file-format
role: symbol
role_heading: Atom
path: quicktime-file-format/mpeg-4_elementary_sound_stream_descriptor_atom
---

# MPEG-4 elementary stream descriptor atom  ('esds')

A required extension to the audio sample description for MPEG-4 audio.

## Mentioned in

QuickTime File Format change log Sound sample data

## Overview

Overview This atom contains an elementary stream descriptor, which is defined in ISO/IEC FDIS 14496.

## Topics

### Data fields

- [Size](quicktime-file-format/mpeg-4_elementary_sound_stream_descriptor_atom/size.md)
- [Type](quicktime-file-format/mpeg-4_elementary_sound_stream_descriptor_atom/type.md)
- [Version](quicktime-file-format/mpeg-4_elementary_sound_stream_descriptor_atom/version.md)
- [Elementary stream descriptor](quicktime-file-format/mpeg-4_elementary_sound_stream_descriptor_atom/elementary_stream_descriptor.md)

## See Also

### Extending sound sample descriptions

- [siSlopeAndIntercept atom](quicktime-file-format/sislopeandintercept_atom.md)
- [siDecompressionParam atom ('wave')](quicktime-file-format/sidecompressionparam_atom.md)
- [Format atom ('frma')](quicktime-file-format/format_atom.md)
- [Terminator atom ('0x00000000')](quicktime-file-format/terminator_atom.md)
- [Audio channel layout atom ('chan')](quicktime-file-format/audio_channel_layout_atom.md)
- [Subtitle follows track reference atom ('folw')](quicktime-file-format/subtitle_follows_track_reference_atom.md)