---
title: Feature code
framework: quicktime-file-format
role: symbol
role_heading: Data field
path: quicktime-file-format/track_profile_atom/feature_code
---

# Feature code

A 32-bit unsigned integer that represents a code specifying a feature.

## Overview

Overview The third field is the feature code, or name, a 32-bit unsigned integer that is usually best interpreted as four ASCII characters. Example: the maximum video bit rate feature has a feature code or name of 'mvbr'. It is permissible to use a feature code value of zero (0x00000000, not four ASCII zero characters) as a placeholder in one or more name-value pairs. The reader should ignore feature codes of value zero.

## See Also

### Data fields

- [Reserved](quicktime-file-format/track_profile_atom/reserved.md)
- [Part-ID](quicktime-file-format/track_profile_atom/part-id.md)
- [Value](quicktime-file-format/track_profile_atom/value.md)