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# dynamicDimensions

A key-value observable property describing the output dimensions of the video buffer based on the device’s dynamic aspect ratio.

```
var dynamicDimensions: CMVideoDimensions { get }
```

## Discussion

If the device’s activeFormat’s [`supportedDynamicAspectRatios`](/documentation/AVFoundation/AVCaptureDevice/Format/supportedDynamicAspectRatios) is an empty array, this property returns {0,0}.

---

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