撮影した動画を保存する

Preview coremotion001

Info.plistにNSMicrophoneUsageDescriptionとNSCameraUsageDescription、NSPhotoLibraryUsageDescriptionを追加します

Swift 5.x/4.x

//
//  ViewController.swift
//  avfoundation004
//
//  Copyright © 2016年 FaBo, Inc. All rights reserved.
//
import UIKit
import AVFoundation
import AssetsLibrary

class ViewController: UIViewController, AVCaptureFileOutputRecordingDelegate {

    // スタートボタン.
    private var myButtonStart: UIButton!

    // ストップボタン.
    private var myButtonStop: UIButton!

    // ビデオのアウトプット.
    private var myVideoOutput: AVCaptureMovieFileOutput!

    override func viewDidLoad() {
        super.viewDidLoad()

        // セッションの作成.
        let mySession = AVCaptureSession()

        // デバイス.
        var myDevice: AVCaptureDevice!

        // 出力先を生成.
        let myImageOutput = AVCaptureStillImageOutput()

        // マイクを取得.
        let audioCaptureDevice = AVCaptureDevice.devices(for: AVMediaType.audio)

        // マイクをセッションのInputに追加.
        let audioInput = try! AVCaptureDeviceInput.init(device: audioCaptureDevice.first!)

        // デバイス一覧の取得.
        let devices = AVCaptureDevice.devices()

        // バックライトをmyDeviceに格納.
        for device in devices {
            if(device.position == AVCaptureDevice.Position.back){
                myDevice = device
            }
        }

        // バックカメラを取得.
        let videoInput = try! AVCaptureDeviceInput.init(device: myDevice)

        // ビデオをセッションのInputに追加.
        mySession.addInput(videoInput)

        // オーディオをセッションに追加.
        mySession.addInput(audioInput);

        // セッションに追加.
        mySession.addOutput(myImageOutput)

        // 動画の保存.
        myVideoOutput = AVCaptureMovieFileOutput()

        // ビデオ出力をOutputに追加.
        mySession.addOutput(myVideoOutput)

        // 画像を表示するレイヤーを生成.
        let myVideoLayer = AVCaptureVideoPreviewLayer.init(session: mySession)
        myVideoLayer.frame = self.view.bounds
        myVideoLayer.videoGravity = AVLayerVideoGravity.resizeAspectFill

        // Viewに追加.
        self.view.layer.addSublayer(myVideoLayer)

        // セッション開始.
        mySession.startRunning()

        // UIボタンを作成.
        myButtonStart = UIButton(frame: CGRect(x: 0, y: 0, width: 120, height: 50))
        myButtonStop = UIButton(frame: CGRect(x: 0, y: 0, width: 120, height: 50))

        myButtonStart.backgroundColor = UIColor.red
        myButtonStop.backgroundColor = UIColor.gray

        myButtonStart.layer.masksToBounds = true
        myButtonStop.layer.masksToBounds = true

        myButtonStart.setTitle("撮影", for: .normal)
        myButtonStop.setTitle("停止", for: .normal)

        myButtonStart.layer.cornerRadius = 20.0
        myButtonStop.layer.cornerRadius = 20.0

        myButtonStart.layer.position = CGPoint(x: self.view.bounds.width/2 - 70, y:self.view.bounds.height-50)
        myButtonStop.layer.position = CGPoint(x: self.view.bounds.width/2 + 70, y:self.view.bounds.height-50)

        myButtonStart.addTarget(self, action: #selector(ViewController.onClickMyButton), for: .touchUpInside)
        myButtonStop.addTarget(self, action: #selector(ViewController.onClickMyButton), for: .touchUpInside)

        // UIボタンをViewに追加.
        self.view.addSubview(myButtonStart);
        self.view.addSubview(myButtonStop);
    }

    /*
     ボタンイベント.
     */
    @objc internal func onClickMyButton(sender: UIButton){

        // 撮影開始.
        if( sender == myButtonStart ){
            let paths = NSSearchPathForDirectoriesInDomains(.documentDirectory, .userDomainMask, true)

            // フォルダ.
            let documentsDirectory = paths[0]

            // ファイル名.
            let filePath = "\(documentsDirectory)/test.mp4"

            // URL.
            let fileURL = URL(fileURLWithPath: filePath)

            // 録画開始.
            myVideoOutput.startRecording(to: fileURL, recordingDelegate: self)
        }
            // 撮影停止.
        else if ( sender == myButtonStop ){
            myVideoOutput.stopRecording()
        }
    }

    // MARK: - AVCaptureFileOutputRecordingDelegate

    /*
     動画のキャプチャーが終わった時に呼ばれるメソッド.
     */
    func fileOutput(_ output: AVCaptureFileOutput, didFinishRecordingTo outputFileURL: URL, from connections: [AVCaptureConnection], error: Error?) {
        //AssetsLibraryを生成する.
        let assetsLib = ALAssetsLibrary()

        //動画のパスから動画をフォトライブラリに保存する.
        assetsLib.writeVideoAtPath(toSavedPhotosAlbum: outputFileURL, completionBlock: nil)    }
}

Swift 3.x

//
//  ViewController.swift
//  avfoundation004
//
//  Copyright © 2016年 FaBo, Inc. All rights reserved.
//
import UIKit
import AVFoundation
import AssetsLibrary

class ViewController: UIViewController, AVCaptureFileOutputRecordingDelegate {

    // スタートボタン.
    private var myButtonStart: UIButton!

    // ストップボタン.
    private var myButtonStop: UIButton!

    // ビデオのアウトプット.
    private var myVideoOutput: AVCaptureMovieFileOutput!

    override func viewDidLoad() {
        super.viewDidLoad()

        // セッションの作成.
        let mySession = AVCaptureSession()

        // デバイス.
        var myDevice: AVCaptureDevice!

        // 出力先を生成.
        let myImageOutput = AVCaptureStillImageOutput()

        // マイクを取得.
        let audioCaptureDevice = AVCaptureDevice.devices(withMediaType: AVMediaTypeAudio)

        // マイクをセッションのInputに追加.
        let audioInput = try! AVCaptureDeviceInput.init(device: audioCaptureDevice?.first as! AVCaptureDevice)

        // デバイス一覧の取得.
        let devices = AVCaptureDevice.devices()

        // バックライトをmyDeviceに格納.
        for device in devices! {
            if(device.position == AVCaptureDevicePosition.back){
                myDevice = device as? AVCaptureDevice
            }
        }

        // バックカメラを取得.
        let videoInput = try! AVCaptureDeviceInput.init(device: myDevice)

        // ビデオをセッションのInputに追加.
        mySession.addInput(videoInput)

        // オーディオをセッションに追加.
        mySession.addInput(audioInput);

        // セッションに追加.
        mySession.addOutput(myImageOutput)

        // 動画の保存.
        myVideoOutput = AVCaptureMovieFileOutput()

        // ビデオ出力をOutputに追加.
        mySession.addOutput(myVideoOutput)

        // 画像を表示するレイヤーを生成.
        let myVideoLayer = AVCaptureVideoPreviewLayer.init(session: mySession)
        myVideoLayer?.frame = self.view.bounds
        myVideoLayer?.videoGravity = AVLayerVideoGravityResizeAspectFill

        // Viewに追加.
        self.view.layer.addSublayer(myVideoLayer!)

        // セッション開始.
        mySession.startRunning()

        // UIボタンを作成.
        myButtonStart = UIButton(frame: CGRect(x: 0, y: 0, width: 120, height: 50))
        myButtonStop = UIButton(frame: CGRect(x: 0, y: 0, width: 120, height: 50))

        myButtonStart.backgroundColor = UIColor.red
        myButtonStop.backgroundColor = UIColor.gray

        myButtonStart.layer.masksToBounds = true
        myButtonStop.layer.masksToBounds = true

        myButtonStart.setTitle("撮影", for: .normal)
        myButtonStop.setTitle("停止", for: .normal)

        myButtonStart.layer.cornerRadius = 20.0
        myButtonStop.layer.cornerRadius = 20.0

        myButtonStart.layer.position = CGPoint(x: self.view.bounds.width/2 - 70, y:self.view.bounds.height-50)
        myButtonStop.layer.position = CGPoint(x: self.view.bounds.width/2 + 70, y:self.view.bounds.height-50)

        myButtonStart.addTarget(self, action: #selector(ViewController.onClickMyButton), for: .touchUpInside)
        myButtonStop.addTarget(self, action: #selector(ViewController.onClickMyButton), for: .touchUpInside)

        // UIボタンをViewに追加.
        self.view.addSubview(myButtonStart);
        self.view.addSubview(myButtonStop);
    }

    /*
     ボタンイベント.
     */
    internal func onClickMyButton(sender: UIButton){

        // 撮影開始.
        if( sender == myButtonStart ){
            let paths = NSSearchPathForDirectoriesInDomains(.documentDirectory, .userDomainMask, true)

            // フォルダ.
            let documentsDirectory = paths[0]

            // ファイル名.
            let filePath = "\(documentsDirectory)/test.mp4"

            // URL.
            let fileURL = URL(fileURLWithPath: filePath!)

            // 録画開始.
            myVideoOutput.startRecording(toOutputFileURL: fileURL, recordingDelegate: self)
        }
            // 撮影停止.
        else if ( sender == myButtonStop ){
            myVideoOutput.stopRecording()
        }
    }

    // MARK: - AVCaptureFileOutputRecordingDelegate

    /*
     動画のキャプチャーが終わった時に呼ばれるメソッド.
     */
    func capture(_ captureOutput: AVCaptureFileOutput!, didFinishRecordingToOutputFileAt outputFileURL: URL!, fromConnections connections: [AnyObject]!, error: Error!) {
        //AssetsLibraryを生成する.
        let assetsLib = ALAssetsLibrary()

        //動画のパスから動画をフォトライブラリに保存する.
        assetsLib.writeVideoAtPath(toSavedPhotosAlbum: outputFileURL, completionBlock: nil)
    }
}

Swift 2.3

//
//  ViewController.swift
//  avfoundation004
//
//  Copyright © 2016年 FaBo, Inc. All rights reserved.
//
import UIKit
import AVFoundation
import AssetsLibrary

class ViewController: UIViewController, AVCaptureFileOutputRecordingDelegate {

    // スタートボタン.
    private var myButtonStart : UIButton!

    // ストップボタン.
    private var myButtonStop : UIButton!

    // ビデオのアウトプット.
    private var myVideoOutput : AVCaptureMovieFileOutput!

    override func viewDidLoad() {
        super.viewDidLoad()

        // セッションの作成.
        let mySession : AVCaptureSession = AVCaptureSession()

        // デバイス.
        var myDevice : AVCaptureDevice!

        // 出力先を生成.
        let myImageOutput = AVCaptureStillImageOutput()

        // マイクを取得.
        let audioCaptureDevice = AVCaptureDevice.devicesWithMediaType(AVMediaTypeAudio)

        // マイクをセッションのInputに追加.
        let audioInput = try! AVCaptureDeviceInput.init(device: audioCaptureDevice?.first as! AVCaptureDevice)

        // デバイス一覧の取得.
        let devices = AVCaptureDevice.devices()

        // バックライトをmyDeviceに格納.
        for device in devices{
            if(device.position == AVCaptureDevicePosition.Back){
                myDevice = device as! AVCaptureDevice
            }
        }

        // バックカメラを取得.
        let videoInput = try! AVCaptureDeviceInput.init(device: myDevice)

        // ビデオをセッションのInputに追加.
        mySession.addInput(videoInput)

        // オーディオをセッションに追加.
        mySession.addInput(audioInput);

        // セッションに追加.
        mySession.addOutput(myImageOutput)

        // 動画の保存.
        myVideoOutput = AVCaptureMovieFileOutput()

        // ビデオ出力をOutputに追加.
        mySession.addOutput(myVideoOutput)

        // 画像を表示するレイヤーを生成.
        let myVideoLayer = AVCaptureVideoPreviewLayer.init(session: mySession)
        myVideoLayer.frame = self.view.bounds
        myVideoLayer.videoGravity = AVLayerVideoGravityResizeAspectFill

        // Viewに追加.
        self.view.layer.addSublayer(myVideoLayer)

        // セッション開始.
        mySession.startRunning()

        // UIボタンを作成.
        myButtonStart = UIButton(frame: CGRectMake(0,0,120,50))
        myButtonStop = UIButton(frame: CGRectMake(0,0,120,50))

        myButtonStart.backgroundColor = UIColor.redColor();
        myButtonStop.backgroundColor = UIColor.grayColor();

        myButtonStart.layer.masksToBounds = true
        myButtonStop.layer.masksToBounds = true

        myButtonStart.setTitle("撮影", forState: .Normal)
        myButtonStop.setTitle("停止", forState: .Normal)

        myButtonStart.layer.cornerRadius = 20.0
        myButtonStop.layer.cornerRadius = 20.0

        myButtonStart.layer.position = CGPoint(x: self.view.bounds.width/2 - 70, y:self.view.bounds.height-50)
        myButtonStop.layer.position = CGPoint(x: self.view.bounds.width/2 + 70, y:self.view.bounds.height-50)

        myButtonStart.addTarget(self, action: #selector(ViewController.onClickMyButton(_:)), forControlEvents: .TouchUpInside)
        myButtonStop.addTarget(self, action: #selector(ViewController.onClickMyButton(_:)), forControlEvents: .TouchUpInside)

        // UIボタンをViewに追加.
        self.view.addSubview(myButtonStart);
        self.view.addSubview(myButtonStop);
    }

    /*
     ボタンイベント.
     */
    internal func onClickMyButton(sender: UIButton){

        // 撮影開始.
        if( sender == myButtonStart ){
            let paths = NSSearchPathForDirectoriesInDomains(.DocumentDirectory, .UserDomainMask, true)

            // フォルダ.
            let documentsDirectory = paths[0] 

            // ファイル名.
            let filePath : String? = "\(documentsDirectory)/test.mp4"

            // URL.
            let fileURL = NSURL(fileURLWithPath: filePath!)

            // 録画開始.
            myVideoOutput.startRecordingToOutputFileURL(fileURL, recordingDelegate: self)
        }

            // 撮影停止.
        else if ( sender == myButtonStop ){
            myVideoOutput.stopRecording()
        }
    }

    // MARK: - AVCaptureFileOutputRecordingDelegate

    /*
     動画のキャプチャーが終わった時に呼ばれるメソッド.
     */
    func captureOutput(captureOutput: AVCaptureFileOutput!, didFinishRecordingToOutputFileAtURL outputFileURL: NSURL!, fromConnections connections: [AnyObject]!, error: NSError!) {

        //AssetsLibraryを生成する.
        let assetsLib = ALAssetsLibrary()

        //動画のパスから動画をフォトライブラリに保存する.
        assetsLib.writeVideoAtPathToSavedPhotosAlbum(outputFileURL, completionBlock: nil)
    }
}

3.xと4.xの差分

AVCaptureDevice.devices(withMediaType: AVMediaTypeAudio) が AVCaptureDevice.devices(for: AVMediaType.audio) に変更
AVCaptureDeviceInput.init(device: audioCaptureDevice?.first as! AVCaptureDevice) が AVCaptureDeviceInput.init(device: audioCaptureDevice.first!) に変更
devices! が devices に変更
AVCaptureDevicePosition が AVCaptureDevice.Position に変更
myVideoLayer? と myVideoLayer! を myVideoLayer に変更
device as? AVCaptureDevice を device に変更
AVLayerVideoGravityResizeAspectFill が AVLayerVideoGravity.resizeAspectFill に変更
internal func onClickMyButton(sender: UIButton) に @objc を追加
filePath! を filePath に変更
startRecording(toOutputFileURL: fileURL, recordingDelegate: self) が startRecording(to: fileURL, recordingDelegate: self) に変更
capture(_ captureOutput: AVCaptureFileOutput!, didFinishRecordingToOutputFileAt outputFileURL: URL!, fromConnections connections: [AnyObject]!, error: Error!) が fileOutput(_ output: AVCaptureFileOutput, didFinishRecordingTo outputFileURL: URL, from connections: [AVCaptureConnection], error: Error?) に変更

2.xと3.xの差分

ALAssetsLibrary.writeVideoAtPathToSavedPhotosAlbum(outputFileURL, completionBlock: nil)からALAssetsLibrary.writeVideoAtPath(toSavedPhotosAlbum videoPathURL: URL!, completionBlock: ALAssetsLibraryWriteVideoCompletionBlock!)に変更する
AVCaptureFileOutputRecordingDelegateプロトコルにおけるのインタフェースの変更
- func captureOutput(captureOutput: AVCaptureFileOutput!, didFinishRecordingToOutputFileAtURL outputFileURL: NSURL!, fromConnections connections: [AnyObject]!, error: NSError!) → func capture(_ captureOutput: AVCaptureFileOutput!, didFinishRecordingToOutputFileAt outputFileURL: URL!, fromConnections connections: [AnyObject]!, error: Error!)
AVCaptureDevice.defaultDeviceWithMediaType(AVMediaTypeVideo)からAVCaptureDevice.defaultDevice(withMediaType: AVMediaTypeVideo)に変更
AVCaptureDevice.devicesWithMediaType(AVMediaTypeAudio)からAVCaptureDevice.devices(withMediaType: AVMediaTypeAudio)に変更
AVCaptureDevicePosition.BackからAVCaptureDevicePosition.backに変更
CGSizeMake(CGFloat, CGFloat)からCGSize(width: CGFloat, height: CGFloat)に変更
UIButton.setTitle(String?, forState: UIControlState)からUIButton.setTitle(String?, for: UIControlState)に変更
NSURLからURLに変更
AVCaptureMovieFileOutput.startRecordingToOutputFileURL(NSURL!, recordingDelegate: AVCaptureFileOutputRecordingDelegate!)からAVCaptureMovieFileOutput.startRecording(toOutputFileURL: URL!, recordingDelegate: AVCaptureFileOutputRecordingDelegate!)に変更

Reference

AV Foundation Framework
- https://developer.apple.com/library/ios/documentation/AVFoundation/Reference/AVFoundationFramework/