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# kVTPixelTransferPropertyKey_DestinationCleanAperture

The clean aperture for destination image buffers.

```
let kVTPixelTransferPropertyKey_DestinationCleanAperture: CFString
```

## Discussion

The value of this property is a <doc://com.apple.documentation/documentation/CoreFoundation/CFDictionary> object with same keys as used in the <doc://com.apple.documentation/documentation/CoreVideo/kCVImageBufferCleanApertureKey> dictionary.

This property is ignored in [`kVTScalingMode_Normal`](/documentation/VideoToolbox/kVTScalingMode_Normal).  This property defaults to `NULL`, meaning the clean aperture is the full width and height.

---

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