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# AVCaptureFileOutputRecordingDelegate

Methods for responding to events that occur while recording captured media to a file.

```
protocol AVCaptureFileOutputRecordingDelegate : NSObjectProtocol
```

## Overview

Defines an interface for delegates of [`AVCaptureFileOutput`](/documentation/AVFoundation/AVCaptureFileOutput) to respond to events that occur in the process of recording a single file.

The delegate of an `AVCaptureFileOutput` object must adopt the `AVCaptureFileOutputRecordingDelegate` protocol.

## Topics

### Delegate methods

[`fileOutput(_:didStartRecordingTo:from:)`](/documentation/AVFoundation/AVCaptureFileOutputRecordingDelegate/fileOutput(_:didStartRecordingTo:from:))

Informs the delegate when the output has started writing to a file.

[`fileOutput(_:didStartRecordingTo:startPTS:from:)`](/documentation/AVFoundation/AVCaptureFileOutputRecordingDelegate/fileOutput(_:didStartRecordingTo:startPTS:from:))

[`fileOutput(_:willFinishRecordingTo:from:error:)`](/documentation/AVFoundation/AVCaptureFileOutputRecordingDelegate/fileOutput(_:willFinishRecordingTo:from:error:))

Informs the delegate when the output will stop writing new samples to a file.

[`fileOutput(_:didFinishRecordingTo:from:error:)`](/documentation/AVFoundation/AVCaptureFileOutputRecordingDelegate/fileOutput(_:didFinishRecordingTo:from:error:))

Informs the delegate when all pending data has been written to an output file.

[`fileOutput(_:didPauseRecordingTo:from:)`](/documentation/AVFoundation/AVCaptureFileOutputRecordingDelegate/fileOutput(_:didPauseRecordingTo:from:))

Called whenever the output is recording to a file and successfully pauses the recording at the request of a client.

[`fileOutput(_:didResumeRecordingTo:from:)`](/documentation/AVFoundation/AVCaptureFileOutputRecordingDelegate/fileOutput(_:didResumeRecordingTo:from:))

Called whenever the output, at the request of the client, successfully resumes a file recording that was paused.


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