---
title: frameDuration
framework: coremediaio
role: symbol
role_heading: Instance Property
path: coremediaio/cmioextensionstreamproperties/frameduration-4rnl9
---

# frameDuration

The duration of the frame.

## Declaration

```swift
@nonobjc var frameDuration: CMTime? { get set }
```

## Discussion

Discussion The key for this property is streamFrameDuration.

## See Also

### Configuring Source Properties

- [activeFormatIndex](coremediaio/cmioextensionstreamproperties/activeformatindex-83u7z.md)
- [maxFrameDuration](coremediaio/cmioextensionstreamproperties/maxframeduration-5qqg.md)