---
title: Duration
framework: quicktime-file-format
role: symbol
role_heading: Data field
path: quicktime-file-format/movie_header_atom/duration
---

# Duration

A time value that indicates the duration of the movie in time scale units.

## Overview

Overview Note that this property is derived from the movie’s tracks. The value of this field corresponds to the duration of the longest track in the movie.

## See Also

### Data fields

- [Size](quicktime-file-format/movie_header_atom/size.md)
- [Type](quicktime-file-format/movie_header_atom/type.md)
- [Version](quicktime-file-format/movie_header_atom/version.md)
- [Flags](quicktime-file-format/movie_header_atom/flags.md)
- [Creation time](quicktime-file-format/movie_header_atom/creation_time.md)
- [Modification time](quicktime-file-format/movie_header_atom/modification_time.md)
- [Time scale](quicktime-file-format/movie_header_atom/time_scale.md)
- [Preferred rate](quicktime-file-format/movie_header_atom/preferred_rate.md)
- [Preferred volume](quicktime-file-format/movie_header_atom/preferred_volume.md)
- [Reserved](quicktime-file-format/movie_header_atom/reserved.md)
- [Matrix structure](quicktime-file-format/movie_header_atom/matrix_structure.md)
- [Preview time](quicktime-file-format/movie_header_atom/preview_time.md)
- [Preview duration](quicktime-file-format/movie_header_atom/preview_duration.md)
- [Poster time](quicktime-file-format/movie_header_atom/poster_time.md)
- [Selection time](quicktime-file-format/movie_header_atom/selection_time.md)