---
title: automaticallyConfiguresOutputBufferDimensions
framework: avfoundation
role: symbol
role_heading: Instance Property
path: avfoundation/avcapturevideodataoutput/automaticallyconfiguresoutputbufferdimensions
---

# automaticallyConfiguresOutputBufferDimensions

A Boolean value that indicates whether the output automatically configures the size of output buffers.

## Declaration

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

## Discussion

Discussion In most configurations, AVCaptureVideoDataOutput delivers full-resolution buffers that match the video dimensions of the capture device’s activeFormat property. When this property is true, the output is free to scale the buffers delivered to captureOutput(_:didOutput:from:) to a size suitable for preview (approximately the size of the screen). You can query this property to find out whether the automatic configuration of output buffer dimensions is downscaling buffers to a preview size. You can also query the output’s videoSettings dictionary to find the buffer’s exact dimensions. The default value of this property is true. important: You must set this property to false before you can manually set deliversPreviewSizedOutputBuffers to true.

## See Also

### Configuring video capture

- [videoSettings](avfoundation/avcapturevideodataoutput/videosettings.md)
- [Video settings](avfoundation/video-settings.md)
- [alwaysDiscardsLateVideoFrames](avfoundation/avcapturevideodataoutput/alwaysdiscardslatevideoframes.md)
- [deliversPreviewSizedOutputBuffers](avfoundation/avcapturevideodataoutput/deliverspreviewsizedoutputbuffers.md)
- [preparesCellularRadioForNetworkConnection](avfoundation/avcapturevideodataoutput/preparescellularradiofornetworkconnection.md)
- [preservesDynamicHDRMetadata](avfoundation/avcapturevideodataoutput/preservesdynamichdrmetadata.md)
- [recommendedMediaTimeScaleForAssetWriter](avfoundation/avcapturevideodataoutput/recommendedmediatimescaleforassetwriter.md)
- [recommendedMovieMetadata(forVideoCodecType:assetWriterOutputFileType:)](avfoundation/avcapturevideodataoutput/recommendedmoviemetadata(forvideocodectype:assetwriteroutputfiletype:).md)
- [recommendedVideoSettings(forVideoCodecType:assetWriterOutputFileType:)](avfoundation/avcapturevideodataoutput/recommendedvideosettings(forvideocodectype:assetwriteroutputfiletype:).md)
- [recommendedVideoSettings(forVideoCodecType:assetWriterOutputFileType:outputFileURL:)](avfoundation/avcapturevideodataoutput/recommendedvideosettings(forvideocodectype:assetwriteroutputfiletype:outputfileurl:).md)
- [recommendedVideoSettingsForAssetWriter(writingTo:)](avfoundation/avcapturevideodataoutput/recommendedvideosettingsforassetwriter(writingto:).md)