---
title: kCMFormatDescriptionKey_CleanApertureWidthRational
framework: coremedia
role: symbol
role_heading: Global Variable
path: coremedia/kcmformatdescriptionkey_cleanaperturewidthrational
---

# kCMFormatDescriptionKey_CleanApertureWidthRational

A key that identifies the clean aperture width rational value.

## Declaration

```swift
let kCMFormatDescriptionKey_CleanApertureWidthRational: CFString
```

## See Also

### Constants

- [kCMFormatDescriptionKey_CleanApertureHeight](coremedia/kcmformatdescriptionkey_cleanapertureheight-swift.var.md)
- [kCMFormatDescriptionKey_CleanApertureHeightRational](coremedia/kcmformatdescriptionkey_cleanapertureheightrational.md)
- [kCMFormatDescriptionKey_CleanApertureHorizontalOffset](coremedia/kcmformatdescriptionkey_cleanaperturehorizontaloffset-swift.var.md)
- [kCMFormatDescriptionKey_CleanApertureHorizontalOffsetRational](coremedia/kcmformatdescriptionkey_cleanaperturehorizontaloffsetrational.md)
- [kCMFormatDescriptionKey_CleanApertureVerticalOffset](coremedia/kcmformatdescriptionkey_cleanapertureverticaloffset-swift.var.md)
- [kCMFormatDescriptionKey_CleanApertureVerticalOffsetRational](coremedia/kcmformatdescriptionkey_cleanapertureverticaloffsetrational.md)
- [kCMFormatDescriptionKey_CleanApertureWidth](coremedia/kcmformatdescriptionkey_cleanaperturewidth-swift.var.md)