Switch between front and back camera while recording a video (Snap / Stories - Instagram) - ios

Question

I created a custom camera, and I am trying to add a feature where users can switch between the front and back camera while recording a video.
But when trying to switch cameras, in the switch function the same pause and execute another video, not allowing me to get them together in a single file and play it at the end without cuts.
import UIKit
import AVFoundation
import CoreMedia
class VideoViewController: UIViewController, AVCaptureFileOutputRecordingDelegate,UITextFieldDelegate,UITextViewDelegate {
#IBOutlet weak var previewView:UIView!
#IBOutlet weak var recordButton: UIButton!
#IBOutlet weak var toggleButton: UIButton!
var captureSession = AVCaptureSession()
var videoCaptureDevice:AVCaptureDevice?
var previewLayer:AVCaptureVideoPreviewLayer?
var movieFileOutput = AVCaptureMovieFileOutput()
var outputFileLocation:URL?
override func viewDidLoad() {
super.viewDidLoad()
self.initializeCamera()
}
func dismissKeybord (){
textView.resignFirstResponder()
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}
override func viewWillLayoutSubviews() {
self.setVideoOrientation()
}
#IBAction func recordVideoButtonPressed(_ sender: AnyObject) {
if self.movieFileOutput.isRecording {
switchcamera = true
self.movieFileOutput.stopRecording()
} else {
self.movieFileOutput.connection(withMediaType: AVMediaTypeVideo).videoOrientation = self.videoOrientation()
self.movieFileOutput.maxRecordedDuration = self.maxRecordedDuration()
self.movieFileOutput.startRecording(toOutputFileURL: URL(fileURLWithPath:self.videoFileLocation()), recordingDelegate: self)
}
self.updateRecordButtonTitle()
}
#IBAction func cameraTogglePressed(_ sender: AnyObject) {
self.switchCameraInput()
}
#IBAction func btnGallery(_ sender: UIButton) {
self.performSegue(withIdentifier: "videoPreview", sender: nil)
}
func initializeCamera(){
self.captureSession.sessionPreset = AVCaptureSessionPresetHigh
let discovery = AVCaptureDeviceDiscoverySession.init(deviceTypes: [AVCaptureDeviceType.builtInWideAngleCamera], mediaType: AVMediaTypeVideo, position: .unspecified) as AVCaptureDeviceDiscoverySession
for device in discovery.devices as [AVCaptureDevice] {
if device.hasMediaType(AVMediaTypeVideo) {
if device.position == AVCaptureDevicePosition.back {
self.videoCaptureDevice = device
}
}
}
if videoCaptureDevice != nil {
do {
try self.captureSession.addInput(AVCaptureDeviceInput(device: self.videoCaptureDevice))
if let audioInput = AVCaptureDevice.defaultDevice(withMediaType: AVMediaTypeAudio) {
try self.captureSession.addInput(AVCaptureDeviceInput(device: audioInput))
}
self.previewLayer = AVCaptureVideoPreviewLayer(session: self.captureSession)
self.previewView.frame = CGRect(x: 0, y: 0, width: self.view.frame.size.width, height: self.view.frame.size.height)
self.previewView.layer.addSublayer(self.previewLayer!)
self.previewLayer?.frame = self.previewView.frame
self.setVideoOrientation()
self.captureSession.addOutput(self.movieFileOutput)
self.captureSession.startRunning()
} catch {
print(error)
}
}
}
//Orientation Camera Record
func setVideoOrientation() {
if let connection = self.previewLayer?.connection {
if connection.isVideoOrientationSupported {
connection.videoOrientation = self.videoOrientation()
self.previewLayer?.frame = self.view.bounds
}
}
}
//Switch Camrea function
func switchCameraInput() {
self.captureSession.beginConfiguration()
var existingConnection:AVCaptureDeviceInput!
for connection in self.captureSession.inputs {
let input = connection as! AVCaptureDeviceInput
if input.device.hasMediaType(AVMediaTypeVideo) {
existingConnection = input
}
}
self.captureSession.removeInput(existingConnection)
var newCamera:AVCaptureDevice!
if let oldCamera = existingConnection {
if oldCamera.device.position == .back {
newCamera = self.cameraWithPosition(position: .front)
} else {
newCamera = self.cameraWithPosition(position: .back)
}
}
var newInput:AVCaptureDeviceInput!
do {
newInput = try AVCaptureDeviceInput(device: newCamera)
self.captureSession.addInput(newInput)
} catch {
print(error)
}
self.captureSession.commitConfiguration()
}
//Capture Function Archive Library
func capture(_ captureOutput: AVCaptureFileOutput!, didFinishRecordingToOutputFileAt outputFileURL: URL!, fromConnections connections: [Any]!, error: Error!) {
print("Finished recording: \(outputFileURL)")
self.outputFileLocation = outputFileURL
//self.performSegue(withIdentifier: "videoPreview", sender: nil)
}
// Video Orientation Record
func videoOrientation() -> AVCaptureVideoOrientation {
var videoOrientation:AVCaptureVideoOrientation!
let orientation:UIDeviceOrientation = UIDevice.current.orientation
switch orientation {
case .portrait:
videoOrientation = .portrait
case .landscapeRight:
videoOrientation = .landscapeLeft
case .landscapeLeft:
videoOrientation = .landscapeRight
case .portraitUpsideDown:
videoOrientation = .portraitUpsideDown
default:
videoOrientation = .portrait
}
return videoOrientation
}
//Video Save Temp Library
func videoFileLocation() -> String {
return NSTemporaryDirectory().appending("prompterFile.mov")
}
// Record Funcition
func updateRecordButtonTitle() {
var isRecording = false
if !self.movieFileOutput.isRecording {
isRecording = true
} else {
isRecording = false
stopScrolling()
//Open Button Gallery
btnGallery.isHidden = false
}
}
func maxRecordedDuration() -> CMTime {
let seconds : Int64 = 300
let preferredTimeScale : Int32 = 1
return CMTimeMake(seconds, preferredTimeScale)
}
func cameraWithPosition(position: AVCaptureDevicePosition) -> AVCaptureDevice?
{
let discovery = AVCaptureDeviceDiscoverySession(deviceTypes: [AVCaptureDeviceType.builtInWideAngleCamera], mediaType: AVMediaTypeVideo, position: .unspecified) as AVCaptureDeviceDiscoverySession
for device in discovery.devices as [AVCaptureDevice] {
if device.position == position {
return device
}
}
return nil
}
override func prepare(for segue: UIStoryboardSegue, sender: Any?) {
let preview = segue.destination as! VideoPreviewViewController
preview.fileLocation = self.outputFileLocation
}
}