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  "title" : "Track production aperture dimensions atom ('prof')"
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# Track production aperture dimensions atom ('prof')

An atom that carries the pixel dimensions of the track’s production aperture.

## Overview

The type of the track production aperture dimensions atom is `‘prof’`.

The layout of a track production aperture dimensions atom is as follows.

|Data field                                                                                                    |Bytes|
|--------------------------------------------------------------------------------------------------------------|-----|
|``doc://com.apple.qtff/documentation/quicktime-file-format/Track_production_aperture_dimensions_atom/Size``   |4    |
|``doc://com.apple.qtff/documentation/quicktime-file-format/Track_production_aperture_dimensions_atom/Type``   |4    |
|``doc://com.apple.qtff/documentation/quicktime-file-format/Track_production_aperture_dimensions_atom/Version``|1    |
|``doc://com.apple.qtff/documentation/quicktime-file-format/Track_production_aperture_dimensions_atom/Flags``  |3    |
|``doc://com.apple.qtff/documentation/quicktime-file-format/Track_production_aperture_dimensions_atom/Width``  |4    |
|``doc://com.apple.qtff/documentation/quicktime-file-format/Track_production_aperture_dimensions_atom/Height`` |4    |

## Topics

### Data fields

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

A 32-bit integer that specifies the number of bytes in the atom.

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

A 32-bit integer that identifies the atom type.

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

A 1-byte specification of the version of this atom.

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

Three bytes that are reserved for the atom flags.

[`Width`](/documentation/quicktime-file-format/Track_production_aperture_dimensions_atom/Width)

A 32-bit fixed-point number that specifies the width of the track production aperture in pixels.

[`Height`](/documentation/quicktime-file-format/Track_production_aperture_dimensions_atom/Height)

A 32-bit fixed-point number that specifies the height of the track production aperture in pixels.


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