---
title: "Base media info atom ('gmin')"
framework: quicktime-file-format
role: symbol
role_heading: Atom
path: quicktime-file-format/base_media_info_atom
---

# Base media info atom ('gmin')

An atom that defines the media’s control information, including graphics mode and balance information.

## Overview

Overview The base media info atom, contained in the base media information header atom ('gmhd'), defines the media’s control information, including graphics mode and balance information. The layout of the base media info atom is as follows.  |   |   |   |   |   |   |   |   |

## Topics

### Data fields

- [Size](quicktime-file-format/base_media_info_atom/size.md)
- [Type](quicktime-file-format/base_media_info_atom/type.md)
- [Version](quicktime-file-format/base_media_info_atom/version.md)
- [Flags](quicktime-file-format/base_media_info_atom/flags.md)
- [Graphics mode](quicktime-file-format/base_media_info_atom/graphics_mode.md)
- [Opcolor](quicktime-file-format/base_media_info_atom/opcolor.md)
- [Balance](quicktime-file-format/base_media_info_atom/balance.md)
- [Reserved](quicktime-file-format/base_media_info_atom/reserved.md)

## See Also

### Describing media

- [Media atom ('mdia')](quicktime-file-format/media_atom.md)
- [Media header atom ('mdhd')](quicktime-file-format/media_header_atom.md)
- [Extended language tag atom ('elng')](quicktime-file-format/extended_language_tag_atom.md)
- [Handler reference atom ('hdlr')](quicktime-file-format/handler_reference_atom.md)
- [Media information atoms](quicktime-file-format/media_information_atoms.md)
- [Video media information atom ('minf')](quicktime-file-format/video_media_information_atom.md)
- [Video media information header atom ('vmhd')](quicktime-file-format/video_media_information_header_atom.md)
- [Sound media information atom ('minf')](quicktime-file-format/sound_media_information_atom.md)
- [Sound media information header atom ('smhd')](quicktime-file-format/sound_media_information_header_atom.md)
- [Base media information atom ('minf')](quicktime-file-format/base_media_information_atom.md)
- [Base media information header atom ('gmhd')](quicktime-file-format/base_media_information_header_atom.md)
- [Data information atom ('dinf')](quicktime-file-format/data_information_atom.md)
- [Data reference atom](quicktime-file-format/media_data_reference_atom.md)