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# supportedOutputSettingsKeys(for:)

Returns a list of supported keys to use in the output settings dictionary.

```
func supportedOutputSettingsKeys(for connection: AVCaptureConnection) -> [String]
```

## Parameters

`connection`

The connection that delivers the media to encode.

## Return Value

An array of keys that can be set in the [`setOutputSettings(_:for:)`](/documentation/AVFoundation/AVCaptureMovieFileOutput/setOutputSettings(_:for:))method.

---

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