---
title: AVMutableTimedMetadataGroup
framework: avfoundation
role: symbol
role_heading: Class
path: avfoundation/avmutabletimedmetadatagroup
---

# AVMutableTimedMetadataGroup

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

## Declaration

```swift
class AVMutableTimedMetadataGroup
```

## Topics

### Configuring the group

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

## Relationships

### Inherits From

- [AVTimedMetadataGroup](avfoundation/avtimedmetadatagroup.md)

### Conforms To

- [AVAssetReaderOutput.SupportedPayload](avfoundation/avassetreaderoutput/supportedpayload.md)
- [CVarArg](swift/cvararg.md)
- [CustomDebugStringConvertible](swift/customdebugstringconvertible.md)
- [CustomStringConvertible](swift/customstringconvertible.md)
- [Equatable](swift/equatable.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)
- [AVTimedMetadataGroup](avfoundation/avtimedmetadatagroup.md)
- [AVDateRangeMetadataGroup](avfoundation/avdaterangemetadatagroup.md)
- [AVMutableDateRangeMetadataGroup](avfoundation/avmutabledaterangemetadatagroup.md)
- [AVPlayerItemMediaDataCollector](avfoundation/avplayeritemmediadatacollector.md)
- [AVPlayerItemMetadataCollector](avfoundation/avplayeritemmetadatacollector.md)