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# VTSessionSetProperties(_:propertyDictionary:)

Sets multiple properties at once.

```
func VTSessionSetProperties(_ session: VTSession, propertyDictionary: CFDictionary) -> OSStatus
```

## Discussion

Sets the properties specified by keys in `propertyDictionary` to the corresponding values.

## Topics

### Related Documentation

[Compression Properties](/documentation/VideoToolbox/compression-properties)

Properties that you use to configure a compression session.

[Decompression Properties](/documentation/VideoToolbox/decompression-properties)

Properties used to configure a VideoToolbox decompression session.

[Pixel Transfer Properties](/documentation/VideoToolbox/pixel-transfer-properties)

Properties used to configure a VideoToolbox pixel transfer session.


---

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