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# PresentationDescriptor

A structure that represents dynamic metadata used during playback or when outputting the metadata track for an immersive video file.

```
struct PresentationDescriptor
```

## Topics

### Initializers

[`init(commands: [PresentationCommand])`](/documentation/ImmersiveMediaSupport/PresentationDescriptor/init(commands:))

Creates an instance that contains the commands specified in the given array.

[`init(duration: CMTime?, commands: [PresentationCommand])`](/documentation/ImmersiveMediaSupport/PresentationDescriptor/init(duration:commands:))

Creates an instance that contains the commands specified in the array:

### Instance Properties

[`var commands: [PresentationCommand]`](/documentation/ImmersiveMediaSupport/PresentationDescriptor/commands)

An array of presentation commands.

[`var duration: CMTime?`](/documentation/ImmersiveMediaSupport/PresentationDescriptor/duration)

The total duration of the presentation commands.

### Instance Methods

## Relationships

### Conforms To

[`SendableMetatype`](/documentation/Swift/SendableMetatype)

[`Sendable`](/documentation/Swift/Sendable)

---

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