---
title: isAuxiliaryContent
framework: avfoundation
role: symbol
role_heading: Type Property
path: avfoundation/avmediacharacteristic/isauxiliarycontent
---

# isAuxiliaryContent

A media characteristic that indicates a track or media selection option includes content its author indicates is auxiliary to the asset’s presentation.

## Declaration

```swift
static let isAuxiliaryContent: AVMediaCharacteristic
```

## Discussion

Discussion An example of auxiliary content is audio commentary about the presentation. The value of this characteristic is public.auxiliary-content. For QuickTime movies and .m4v files, a media option has this characteristic only if the media’s author tags it that way, or if it belongs to an alternate track group that excludes its associated track from autoselection.

## See Also

### Content

- [isOriginalContent](avfoundation/avmediacharacteristic/isoriginalcontent.md)
- [isMainProgramContent](avfoundation/avmediacharacteristic/ismainprogramcontent.md)
- [machineGenerated](avfoundation/avmediacharacteristic/machinegenerated.md)