Swift 3: Rerecord video through AVFoundation - ios

Question

I am Record video through custom camera successfully but one thing more. when i want to again record video then nothing happen. How i fix this. I am loading cameraConfigration() method in viewWillAppear() and for Start Recording call recordVideo() method and for stop call Stoprecording() method. Here is my code.
func stopRecording() {
sessionOutput.stopRecording()
captureSession.stopRunning()
previewLayer.removeFromSuperlayer()
}
func recordVideo(){
// custom camera
let paths = NSTemporaryDirectory()
let outputFile = paths.appending("t\(Timestamp).MOV")
let outputURL = NSURL(fileURLWithPath:outputFile)
sessionOutput.startRecording(toOutputFileURL: outputURL as URL!, recordingDelegate: self)
}
func cameraConfigration(){
let deviceDiscoverySession = AVCaptureDeviceDiscoverySession(deviceTypes: [AVCaptureDeviceType.builtInDuoCamera, AVCaptureDeviceType.builtInTelephotoCamera,AVCaptureDeviceType.builtInWideAngleCamera], mediaType: AVMediaTypeVideo, position: AVCaptureDevicePosition.unspecified)
for device in (deviceDiscoverySession?.devices)! {
if(device.position == AVCaptureDevicePosition.back){
do{
let input = try AVCaptureDeviceInput(device: device)
if(captureSession.canAddInput(input)){
captureSession.addInput(input);
if(captureSession.canAddOutput(sessionOutput)){
captureSession.addOutput(sessionOutput);
previewLayer = AVCaptureVideoPreviewLayer(session: captureSession);
previewLayer.videoGravity = AVLayerVideoGravityResizeAspectFill;
previewLayer.connection.videoOrientation = AVCaptureVideoOrientation.portrait;
cameraPreview.layer.addSublayer(previewLayer);
}
captureSession.startRunning()
}
}
catch{
print("exception!");
}
}
}
}
func startCameraFromViewController(viewController: UIViewController, withDelegate delegate: UIImagePickerControllerDelegate & UINavigationControllerDelegate) -> Bool {
if UIImagePickerController.isSourceTypeAvailable(.camera) == false {
return false
}
let cameraController = UIImagePickerController()
cameraController.sourceType = .camera
cameraController.mediaTypes = [kUTTypeMovie as NSString as String]
cameraController.allowsEditing = false
cameraController.delegate = delegate
present(cameraController, animated: true, completion: nil)
return true
}
override func viewDidAppear(_ animated: Bool) {
cameraConfigration()
}
``

Answer 1

The problem is in stopRecording() function, in this function you stop the recording and remove previewLayer form its superview previewLayer.removeFromSuperlayer() and again when you try to start the recording previewLayer is missing, the controller cannot find the previewLayer so nothing is happening.
try commenting the line previewLayer.removeFromSuperlayer() or add you previewLayer in startRecording() function.
previewLayer = AVCaptureVideoPreviewLayer(session: captureSession);
previewLayer.videoGravity = AVLayerVideoGravityResizeAspectFill;
previewLayer.connection.videoOrientation = AVCaptureVideoOrientation.portrait;
cameraPreview.layer.addSublayer(previewLayer);
before start Recording. sessionOutput.startRecording(toOutputFileURL: outputURL as URL!, recordingDelegate: self)
before this line.