---
title: marksOutputTrackAsEnabled
framework: avfoundation
role: symbol
role_heading: Instance Property
path: avfoundation/avassetwriterinput/marksoutputtrackasenabled
---

# marksOutputTrackAsEnabled

A Boolean value that indicates whether to enable a track in the output for playback and processing.

## Declaration

```swift
var marksOutputTrackAsEnabled: Bool { get set }
```

## Discussion

Discussion The default value is true. If the format you’re writing supports disabling tracks, you can disable a track by setting this value to false. You can’t set this value after writing starts.

## See Also

### Configuring presentation

- [naturalSize](avfoundation/avassetwriterinput/naturalsize.md)
- [transform](avfoundation/avassetwriterinput/transform.md)
- [preferredVolume](avfoundation/avassetwriterinput/preferredvolume.md)
- [mediaTimeScale](avfoundation/avassetwriterinput/mediatimescale.md)