---
title: Supported Property Dictionary Constants
framework: videotoolbox
role: collectionGroup
role_heading: API Collection
path: videotoolbox/supported-dictionary-constants
---

# Supported Property Dictionary Constants

Property dictionary key and constant values.

## Overview

Overview Property dictionary key and constant values for a dictionary populated by VTSessionCopySupportedPropertyDictionary(_:supportedPropertyDictionaryOut:).

## Topics

### Properties

- [kVTPropertyTypeKey](videotoolbox/kvtpropertytypekey.md)
- [Property Type Constants](videotoolbox/property-type-constants.md)
- [kVTPropertyReadWriteStatusKey](videotoolbox/kvtpropertyreadwritestatuskey.md)
- [Read/Write Status Constants](videotoolbox/read-write-status-constants.md)
- [kVTPropertyShouldBeSerializedKey](videotoolbox/kvtpropertyshouldbeserializedkey.md)
- [kVTPropertySupportedValueListKey](videotoolbox/kvtpropertysupportedvaluelistkey.md)
- [kVTPropertySupportedValueMaximumKey](videotoolbox/kvtpropertysupportedvaluemaximumkey.md)
- [kVTPropertySupportedValueMinimumKey](videotoolbox/kvtpropertysupportedvalueminimumkey.md)
- [kVTPropertyDocumentationKey](videotoolbox/kvtpropertydocumentationkey.md)

## See Also

### Getting Properties

- [VTSessionCopyProperty(_:key:allocator:valueOut:)](videotoolbox/vtsessioncopyproperty(_:key:allocator:valueout:).md)
- [VTSessionCopySerializableProperties(_:allocator:dictionaryOut:)](videotoolbox/vtsessioncopyserializableproperties(_:allocator:dictionaryout:).md)
- [VTSessionCopySupportedPropertyDictionary(_:supportedPropertyDictionaryOut:)](videotoolbox/vtsessioncopysupportedpropertydictionary(_:supportedpropertydictionaryout:).md)