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# addConnection(_:)

Adds a connection to the capture session.

```
func addConnection(_ connection: AVCaptureConnection)
```

## Parameters

`connection`

The capture connection to add to the session.

## Discussion

You can only add a capture connection to a session using this method if [`canAddConnection(_:)`](/documentation/AVFoundation/AVCaptureSession/canAddConnection(_:)) returns <doc://com.apple.documentation/documentation/Swift/true>.

When using [`addInput(_:)`](/documentation/AVFoundation/AVCaptureSession/addInput(_:)) or [`addOutput(_:)`](/documentation/AVFoundation/AVCaptureSession/addOutput(_:)), the session automatically forms connections between all compatible inputs and outputs. Manually adding connections is only necessary when adding an input or output with no connections.

---

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