<!--
{
  "availability" : [

  ],
  "documentType" : "symbol",
  "framework" : "QuickTime File Format",
  "identifier" : "/documentation/quicktime-file-format/Timecode_media_information_atom",
  "metadataVersion" : "0.1.0",
  "role" : "Atom",
  "symbol" : {
    "kind" : "Atom",
    "modules" : [
      "QuickTime File Format"
    ],
    "preciseIdentifier" : "__docc_universal_symbol_reference_$Timecode_media_information_atom"
  },
  "title" : "Timecode media information atom ('tcmi')"
}
-->

# Timecode media information atom ('tcmi')

An atom that governs how the timecode text is displayed.

## Overview

The timecode media also requires a media information atom. This atom contains information governing how the timecode text is displayed. This media information atom is stored in a base media information atom (see [`Base media information atom`](/documentation/quicktime-file-format/Base_media_information_atom) for more information). The type of the timecode media information atom is `'tcmi'`.

## Topics

### Data fields

[`Size`](/documentation/quicktime-file-format/Timecode_media_information_atom/Size)

A 32-bit integer that specifies the number of bytes in this time code media information atom.

[`Type`](/documentation/quicktime-file-format/Timecode_media_information_atom/Type)

A 32-bit integer that identifies the atom type.

[`Version`](/documentation/quicktime-file-format/Timecode_media_information_atom/Version)

A 1-byte specification of the version of this timecode media information atom.

[`Flags`](/documentation/quicktime-file-format/Timecode_media_information_atom/Flags)

A 3-byte space for timecode media information flags.

[`Text font`](/documentation/quicktime-file-format/Timecode_media_information_atom/Text_font)

A 16-bit integer that indicates the font to use.

[`Text face`](/documentation/quicktime-file-format/Timecode_media_information_atom/Text_face)

A 16-bit integer that indicates the font’s style.

[`Text size`](/documentation/quicktime-file-format/Timecode_media_information_atom/Text_size)

A 16-bit integer that specifies the point size of the time code text.

[`Reserved`](/documentation/quicktime-file-format/Timecode_media_information_atom/Reserved)

A 16-bit integer that is reserved for use by Apple.

[`Text color`](/documentation/quicktime-file-format/Timecode_media_information_atom/Text_color)

A 48-bit RGB color value for the timecode text.

[`Background color`](/documentation/quicktime-file-format/Timecode_media_information_atom/Background_color)

A 48-bit RGB background color for the timecode text.

[`Font name`](/documentation/quicktime-file-format/Timecode_media_information_atom/Font_name)

A Pascal string specifying the name of the timecode text’s font.


---

Copyright &copy; 2026 Apple Inc. All rights reserved. | [Terms of Use](https://www.apple.com/legal/internet-services/terms/site.html) | [Privacy Policy](https://www.apple.com/privacy/privacy-policy)