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

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

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

## Mentioned in

QuickTime File Format change log Video sample data

## Overview

Overview This atom contains an MPEG-4 elementary stream descriptor atom. This is a required extension to the video sample description for MPEG-4 video. This extension appears in video sample descriptions only when the codec type is 'mp4v'. note: The elementary stream descriptor which this atom contains is defined in the MPEG-4 specification ISO/IEC FDIS 14496-1.

## Topics

### Data fields

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

## See Also

### Extending video sample descriptions

- [Pixel aspect ratio ('pasp')](quicktime-file-format/pixel_aspect_ratio.md)
- [AVC decoder configuration atom ('avcC')](quicktime-file-format/avc_decoder_configuration_atom.md)
- [Color parameter atom ('colr')](quicktime-file-format/color_parameter_atom.md)
- [Clean aperture ('clap')](quicktime-file-format/clean_aperture.md)