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# kVTCompressionPropertyKey_PixelTransferProperties

Properties for configuring a pixel transfer session.

```
let kVTCompressionPropertyKey_PixelTransferProperties: CFString
```

## Discussion

The properties for configuring a [VTPixelTransferSession](/documentation/VideoToolbox/VTPixelTransferSession-api-collection) to transfer source frames from the client’s image buffers to the video encoder’s image buffers, if necessary.

## Discussion

The value is a <doc://com.apple.documentation/documentation/CoreFoundation/CFDictionary> of properties to configure a [VTPixelTransferSession](/documentation/VideoToolbox/VTPixelTransferSession-api-collection). Setting this property alone does not necessarily guarantee that a [VTPixelTransferSession](/documentation/VideoToolbox/VTPixelTransferSession-api-collection) will be created.

---

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