---
title: VTExtensionPropertiesKey
framework: videotoolbox
role: symbol
role_heading: Structure
path: videotoolbox/vtextensionpropertieskey
---

# VTExtensionPropertiesKey

A key in a Media Extension extension properties dictionary.

## Declaration

```swift
struct VTExtensionPropertiesKey
```

## Topics

### Keys

- [containingBundleName](videotoolbox/vtextensionpropertieskey/containingbundlename.md)
- [containingBundleURL](videotoolbox/vtextensionpropertieskey/containingbundleurl.md)
- [extensionIdentifier](videotoolbox/vtextensionpropertieskey/extensionidentifier.md)
- [extensionName](videotoolbox/vtextensionpropertieskey/extensionname.md)
- [extensionURL](videotoolbox/vtextensionpropertieskey/extensionurl.md)

### Initializers

- [init(rawValue:)](videotoolbox/vtextensionpropertieskey/init(rawvalue:).md)

## Relationships

### Conforms To

- [Equatable](swift/equatable.md)
- [Hashable](swift/hashable.md)
- [RawRepresentable](swift/rawrepresentable.md)
- [Sendable](swift/sendable.md)
- [SendableMetatype](swift/sendablemetatype.md)