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# init(title:timedNavigationMarkers:)

Initializes a navigation markers group with the specified title and array of timed navigation markers.

```
init(title: String?, timedNavigationMarkers navigationMarkers: [AVTimedMetadataGroup])
```

## Parameters

`title`

The title to present for the markers group.

`navigationMarkers`

The array of timed navigation markers for which the group provides navigation.

## Return Value

A new navigation markers group.

## Discussion

To associate marker groups with an asset for playback, use the <doc://com.apple.documentation/documentation/AVFoundation/AVPlayerItem/navigationMarkerGroups> property of an <doc://com.apple.documentation/documentation/AVFoundation/AVPlayerItem> object.

To create a chapter list, pass `nil` for the `title` parameter and set the group as the first item in the player item’s <doc://com.apple.documentation/documentation/AVFoundation/AVPlayerItem/navigationMarkerGroups> array. To provide additional options for navigating media (such as a “Goals Scored” group for a recorded sporting event), provide a unique `title` value for each marker group in the array.

---

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