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# SCStreamDelegate

A delegate protocol your app implements to respond to stream events.

```
protocol SCStreamDelegate : NSObjectProtocol
```

## Topics

### Responding to Presenter Overlay

[`outputVideoEffectDidStart(for:)`](/documentation/ScreenCaptureKit/SCStreamDelegate/outputVideoEffectDidStart(for:))

Tells the delegate that Presenter Overlay started.

[`outputVideoEffectDidStop(for:)`](/documentation/ScreenCaptureKit/SCStreamDelegate/outputVideoEffectDidStop(for:))

Tells the delegate that Presenter Overlay stopped.

### Responding to stream stoppage

[`stream(_:didStopWithError:)`](/documentation/ScreenCaptureKit/SCStreamDelegate/stream(_:didStopWithError:))

Tells the delegate that the stream stopped with an error.


---

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