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# isMultiCamSupported

A Boolean value that indicates whether a multi-camera capture session supports this format.

```
var isMultiCamSupported: Bool { get }
```

## Discussion

When performing single-camera capture using [`AVCaptureSession`](/documentation/AVFoundation/AVCaptureSession), you may set any of the device’s formats as its [`activeFormat`](/documentation/AVFoundation/AVCaptureDevice/activeFormat). However, when using [`AVCaptureMultiCamSession`](/documentation/AVFoundation/AVCaptureMultiCamSession), you may only set the device’s format to one in which [`isMultiCamSupported`](/documentation/AVFoundation/AVCaptureDevice/Format/isMultiCamSupported) is <doc://com.apple.documentation/documentation/Swift/true>. Only this limited subset of capture formats can run sustainably in a multi-camera capture scenario.

---

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