---
title: sourceVideoAverageFrameDuration
framework: avfoundation
role: symbol
role_heading: Instance Property
path: avfoundation/avoutputsettingsassistant/sourcevideoaverageframeduration
---

# sourceVideoAverageFrameDuration

A time value that describes the average frame duration of the video data.

## Declaration

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

## Discussion

Discussion Setting this property enables the output settings assistant to generate more complete video settings. After setting a value, requery the videoSettings property to get the latest values. The default value is 1/30, which means the output settings assistant assumes that your source video has a frame rate of 30fps.

## See Also

### Configuring output settings

- [outputFileType](avfoundation/avoutputsettingsassistant/outputfiletype.md)
- [audioSettings](avfoundation/avoutputsettingsassistant/audiosettings.md)
- [sourceAudioFormat](avfoundation/avoutputsettingsassistant/sourceaudioformat.md)
- [videoSettings](avfoundation/avoutputsettingsassistant/videosettings.md)
- [sourceVideoFormat](avfoundation/avoutputsettingsassistant/sourcevideoformat.md)
- [sourceVideoMinFrameDuration](avfoundation/avoutputsettingsassistant/sourcevideominframeduration.md)