# fileOutput(_:didFinishRecordingTo:from:error:) Informs the delegate when all pending data has been written to an output file. ``` func fileOutput(_ output: AVCaptureFileOutput, didFinishRecordingTo outputFileURL: URL, from connections: [AVCaptureConnection], error: (any Error)?) ``` ## Parameters `output` The capture file output that has finished writing the file. `outputFileURL` The file URL of the file that is being written. `connections` An array of [`AVCaptureConnection`](/documentation/AVFoundation/AVCaptureConnection) objects attached to the file output that provided the data that is being written to the file. `error` If the file was not written successfully, an error object that describes the problem; otherwise `nil`. ## Discussion This method is called whenever a file is finished. If the file was forced to be finished due to an error, the error is described in the error parameter—otherwise, the error parameter is `nil`. This method is called when the file output has finished writing all data to a file whose recording was stopped, either because [`startRecording(to:recordingDelegate:)`](/documentation/AVFoundation/AVCaptureFileOutput/startRecording(to:recordingDelegate:)) or [`stopRecording()`](/documentation/AVFoundation/AVCaptureFileOutput/stopRecording()) were called, or because an error (described by the error parameter) occurred (if no error occurred, the error parameter is `nil`). This method is always called for each recording request, even if no data is successfully written to the file. You should not assume that this method will be called on a specific thread. --- Copyright © 2026 Apple Inc. All rights reserved. | [Terms of Use](https://www.apple.com/legal/internet-services/terms/site.html) | [Privacy Policy](https://www.apple.com/privacy/privacy-policy)