---
title: AVTimedMetadataGroup
framework: avfoundation
role: symbol
role_heading: Class
path: avfoundation/avtimedmetadatagroup
---

# AVTimedMetadataGroup

A collection of metadata items that are valid for use during a specific time range.

## Declaration

```swift
class AVTimedMetadataGroup
```

## Mentioned in

Presenting chapter markers

## Overview

Overview For example, AVTimedMetadataGroups are used to represent chapters, optionally containing metadata items for chapter titles and chapter images.

## Topics

### Creating a timed metadata group

- [init(sampleBuffer:)](avfoundation/avtimedmetadatagroup/init(samplebuffer:)-6atlv.md)
- [init(items:timeRange:)](avfoundation/avtimedmetadatagroup/init(items:timerange:).md)
- [init(sampleBuffer:)](avfoundation/avtimedmetadatagroup/init(samplebuffer:)-bjuo.md)

### Accessing group attributes

- [items](avfoundation/avtimedmetadatagroup/items.md)
- [timeRange](avfoundation/avtimedmetadatagroup/timerange.md)

### Creating a format description

- [copyFormatDescription()](avfoundation/avtimedmetadatagroup/copyformatdescription().md)

## Relationships

### Inherits From

- [AVMetadataGroup](avfoundation/avmetadatagroup.md)

### Inherited By

- [AVMutableTimedMetadataGroup](avfoundation/avmutabletimedmetadatagroup.md)

### Conforms To

- [AVAssetReaderOutput.SupportedPayload](avfoundation/avassetreaderoutput/supportedpayload.md)
- [CVarArg](swift/cvararg.md)
- [Copyable](swift/copyable.md)
- [CustomDebugStringConvertible](swift/customdebugstringconvertible.md)
- [CustomStringConvertible](swift/customstringconvertible.md)
- [Equatable](swift/equatable.md)
- [Escapable](swift/escapable.md)
- [Hashable](swift/hashable.md)
- [NSCopying](foundation/nscopying.md)
- [NSMutableCopying](foundation/nsmutablecopying.md)
- [NSObjectProtocol](objectivec/nsobjectprotocol.md)

## See Also

### Timed metadata

- [Presenting chapter markers](avfoundation/presenting-chapter-markers.md)
- [AVMetadataGroup](avfoundation/avmetadatagroup.md)
- [AVMutableTimedMetadataGroup](avfoundation/avmutabletimedmetadatagroup.md)
- [AVDateRangeMetadataGroup](avfoundation/avdaterangemetadatagroup.md)
- [AVMutableDateRangeMetadataGroup](avfoundation/avmutabledaterangemetadatagroup.md)
- [AVPlayerItemMediaDataCollector](avfoundation/avplayeritemmediadatacollector.md)
- [AVPlayerItemMetadataCollector](avfoundation/avplayeritemmetadatacollector.md)