偉大的雷鋒同志

畫面采集

導(dǎo)入AVFoundation
1.在Main.storyboard上拖入3個按鈕,一個是開始錄制,一個是暫停錄制,一個是旋轉(zhuǎn)鏡頭.

main.storyBoard上的三個按鈕

  // 創(chuàng)建一個錄制會話對象
    fileprivate lazy var session : AVCaptureSession = AVCaptureSession()

  // 創(chuàng)建一個預(yù)覽圖層
    fileprivate lazy var preViewLayer : AVCaptureVideoPreviewLayer =          AVCaptureVideoPreviewLayer(session: self.session)

// 創(chuàng)建全局隊列
    fileprivate lazy var queue  = DispatchQueue.global()
    fileprivate lazy var audioQueue  = DispatchQueue.global()

    // 創(chuàng)建視頻輸入源
    fileprivate var videoInput : AVCaptureDeviceInput?
    // 創(chuàng)建視頻輸出源
    fileprivate var videoOutPut : AVCaptureVideoDataOutput?
    // 創(chuàng)建音頻輸入源
    fileprivate var audioInput : AVCaptureDeviceInput?
    // 創(chuàng)建音頻輸出源
    fileprivate var audioOutPut : AVCaptureAudioDataOutput?

開始采集畫面

fileprivate func setUpVideo(){
        // 會話輸入源(獲取攝像頭)
        // 獲取設(shè)備
        guard let devices = AVCaptureDevice.devices(withMediaType: AVMediaTypeVideo) as? [AVCaptureDevice] else {
            print("模擬器無效")
            
            return
        }
        // 獲取前置攝像頭
        guard let deviece = devices.filter({ $0.position == .front }).first else {
            return
        }
        // 獲取AVCaptureDeviceInput 輸入源
        guard let input : AVCaptureDeviceInput = try? AVCaptureDeviceInput(device: deviece) else {
            return
        }
        // 設(shè)置視頻輸入源 全局變量
        self.videoInput = input
        // 判斷視頻會話對象是否能添加輸入源
        if self.session.canAddInput(input){
          self.session.addInput(input)
        }
        
        
        // 會話輸出源
        let outPut : AVCaptureVideoDataOutput = AVCaptureVideoDataOutput()
        // 設(shè)置輸出源的代理
        outPut.setSampleBufferDelegate(self, queue: self.queue)
        
        // 判斷視頻錄制會話對象是否能添加輸出源
        if self.session.canAddOutput(outPut){
            self.session.addOutput(outPut)
        }
        self.videoOutPut = outPut

旋轉(zhuǎn)鏡頭

// 添加鏡頭旋轉(zhuǎn)的動畫
@IBAction func rotateCamera(_ sender: AnyObject) {
        // 添加旋轉(zhuǎn)攝像頭的動畫
        let rotaionAnim = CATransition()
        rotaionAnim.type = "oglFlip"
        rotaionAnim.subtype = "fromLeft"
        rotaionAnim.duration = 0.5
        view.layer.add(rotaionAnim, forKey: nil)
        // 獲取之前的鏡頭
        guard var position = self.videoInput?.device.position else {return}
        // 設(shè)置相反的位置的鏡頭
        position = position == .front ? .back : .front
        // 根據(jù)現(xiàn)在攝像頭的位置創(chuàng)建新的device
        let devices = AVCaptureDevice.devices(withMediaType: AVMediaTypeVideo) as? [AVCaptureDevice]
        guard let device = devices?.filter({$0.position == position}).first else {return}
        // 創(chuàng)建新的輸入源
        guard let input = try? AVCaptureDeviceInput(device: device) else {return}
        // 在session中切換input
        session.beginConfiguration()
        session.removeInput(self.videoInput)
        if session.canAddInput(self.videoInput) {
            session.addInput(input)

        }
        self.videoInput = input
        session.commitConfiguration()
}

4.采集音頻

fileprivate func setUpAudio(){
        // 創(chuàng)建音頻輸入源(話筒)
        // 獲取設(shè)備
        guard let device = AVCaptureDevice.defaultDevice(withMediaType: AVMediaTypeAudio) else {return}
        // 創(chuàng)建輸入源
        guard let input = try? AVCaptureDeviceInput(device: device) else {return}
        self.audioInput = input
        // 判斷是否能添加輸入源
        if session.canAddInput(input) {
            session.addInput(input)
        }
        // 創(chuàng)建輸出源
        let outPut = AVCaptureAudioDataOutput()
        // 設(shè)置代理
        outPut.setSampleBufferDelegate(self, queue: self.audioQueue)
        self.audioOutPut = outPut
        // 判斷是否能添加輸出源
        if session.canAddOutput(outPut){
            session.addOutput(outPut)
        }
//        

遵守音頻錄制和視頻錄制的代理,兩個代理方法是同一個

// 遵守錄制視頻輸出會話的代理,sampleBuffer就是美顏所修改的東西
extension ViewController : AVCaptureVideoDataOutputSampleBufferDelegate,AVCaptureAudioDataOutputSampleBufferDelegate{
    func captureOutput(_ captureOutput: AVCaptureOutput!, didOutputSampleBuffer sampleBuffer: CMSampleBuffer!, from connection: AVCaptureConnection!) {
        if connection == self.videoOutPut?.connection(withMediaType: AVMediaTypeVideo) {
            print("輸出視頻畫面")
        }else{
            print("獲取音頻!")
        }
    }
    
}

5.停止錄制

// 停止錄制
    @IBAction func stopCapture(_ sender: AnyObject) {
        self.session.stopRunning()
        self.preViewLayer.removeFromSuperlayer()
        self.fileOutPut?.stopRecording()
        // 移除輸入源和舒楚媛
        self.session.removeInput(self.videoInput)
        self.session.removeOutput(self.videoOutPut)
        self.session.removeInput(self.audioInput)
        self.session.removeOutput(self.audioOutPut)
        self.session.removeOutput(self.fileOutPut)
    }

將程序跑到真機上,點擊開始錄制即可以錄制成功!
Demo