---
title: duration
framework: MediaExtension
role: symbol
role_heading: Instance Property
platforms: [macOS 14.0+]
path: mediaextension/mefileinfo/duration
---

# duration

The duration of the media asset, if available.

## Declaration

```swift
var duration: CMTime { get set }
```

## Discussion

Discussion This value is invalid if the duration isn’t available.

## See Also

### Inspecting file properties

- [fragmentsStatus](mediaextension/mefileinfo/fragmentsstatus-swift.property.md)
- [MEFileInfo.FragmentsStatus](mediaextension/mefileinfo/fragmentsstatus-swift.enum.md)