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# AVAssetTrackGroup

A group of related tracks in an asset.

```
class AVAssetTrackGroup
```

## Overview

A track group describes a group of related alternative tracks, only one of which should play at a time. Groups of alternative tracks typically contain variations of the same content, like subtitles in multiple translations.

You can inspect an asset’s track groups by loading the value of its [`trackGroups`](/documentation/AVFoundation/AVPartialAsyncProperty/trackGroups) property.

## Topics

### Getting track ID values

[`trackIDs`](/documentation/AVFoundation/AVAssetTrackGroup/trackIDs)

The IDs of the tracks in the group.


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