---
title: kVTPixelTransferPropertyKey_ScalingMode
framework: videotoolbox
role: symbol
role_heading: Global Variable
path: videotoolbox/kvtpixeltransferpropertykey_scalingmode
---

# kVTPixelTransferPropertyKey_ScalingMode

Scaling mode for images during transfer between source and destination buffers.

## Declaration

```swift
let kVTPixelTransferPropertyKey_ScalingMode: CFString
```

## Discussion

Discussion Depending on the scaling mode, scaling may take into account: The full image buffer width and height of the source and destination The clean aperture attachment (kCVImageBufferCleanApertureKey) on the source image buffer The pixel aspect ratio attachment (kCVImageBufferPixelAspectRatioKey) on the source image buffer The destination clean aperture (kVTPixelTransferPropertyKey_DestinationCleanAperture) The destination pixel aspect ratio (kVTPixelTransferPropertyKey_DestinationPixelAspectRatio) The destination image buffer’s clean aperture and pixel aspect ratio attachments are not taken into account, and are overwritten.

## See Also

### Configuration

- [Scaling Mode Constants](videotoolbox/scaling-mode-constants.md)
- [kVTPixelTransferPropertyKey_DestinationCleanAperture](videotoolbox/kvtpixeltransferpropertykey_destinationcleanaperture.md)
- [kVTPixelTransferPropertyKey_DestinationPixelAspectRatio](videotoolbox/kvtpixeltransferpropertykey_destinationpixelaspectratio.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)