---
title: kVTPixelTransferPropertyKey_DestinationPixelAspectRatio
framework: videotoolbox
role: symbol
role_heading: Global Variable
path: videotoolbox/kvtpixeltransferpropertykey_destinationpixelaspectratio
---

# kVTPixelTransferPropertyKey_DestinationPixelAspectRatio

The pixel aspect ratio for destination image buffers.

## Declaration

```swift
let kVTPixelTransferPropertyKey_DestinationPixelAspectRatio: CFString
```

## Discussion

Discussion The value of this property is a CFDictionary object with same keys as used in the kCVImageBufferPixelAspectRatioKey dictionary. This property is ignored in kVTScalingMode_Normal.  This property defaults to NULL, meaning 1:1 (for kVTScalingMode_CropSourceToCleanAperture) or no change in pixel aspect ratio (for kVTScalingMode_Letterbox and kVTScalingMode_Trim).

## See Also

### Configuration

- [kVTPixelTransferPropertyKey_ScalingMode](videotoolbox/kvtpixeltransferpropertykey_scalingmode.md)
- [Scaling Mode Constants](videotoolbox/scaling-mode-constants.md)
- [kVTPixelTransferPropertyKey_DestinationCleanAperture](videotoolbox/kvtpixeltransferpropertykey_destinationcleanaperture.md)
- [kVTPixelTransferPropertyKey_DownsamplingMode](videotoolbox/kvtpixeltransferpropertykey_downsamplingmode.md)
- [Downsampling Mode Constants](videotoolbox/downsampling-mode-constants.md)
- [kVTPixelTransferPropertyKey_DestinationColorPrimaries](videotoolbox/kvtpixeltransferpropertykey_destinationcolorprimaries.md)
- [kVTPixelTransferPropertyKey_DestinationTransferFunction](videotoolbox/kvtpixeltransferpropertykey_destinationtransferfunction.md)
- [kVTPixelTransferPropertyKey_DestinationICCProfile](videotoolbox/kvtpixeltransferpropertykey_destinationiccprofile.md)
- [kVTPixelTransferPropertyKey_DestinationYCbCrMatrix](videotoolbox/kvtpixeltransferpropertykey_destinationycbcrmatrix.md)
- [kVTPixelTransferPropertyKey_RealTime](videotoolbox/kvtpixeltransferpropertykey_realtime.md)