this._captureSession = AVCaptureSession.new();
        //Get the camera

        this._captureSession.sessionPreset = AVCaptureSessionPreset640x480;

        let inputDevice = null;
        this._cameraDevice = AVCaptureDevice.defaultDeviceWithMediaType(AVMediaTypeVideo);


        //Get the camera input
        let error: NSError = null;
        this._captureInput = AVCaptureDeviceInput.deviceInputWithDeviceError(this._cameraDevice);

        if(this._captureSession.canAddInput(this._captureInput)){
            this._captureSession.addInput(this._captureInput);
        }
        else{
            console.log("couldn't add input");
        }
        let self = this;
        const VideoDelegate = (NSObject as any).extend({
            captureOutputDidOutputSampleBufferFromConnection(captureOutput: any,sampleBuffer: any, connection:any): void {
               console.log("Captureing Frames");
              if(self.startRecording){
                self._mp4Writer.appendVideoSample(sampleBuffer);
                console.log("Appending Video Samples");
              }
            },
            captureOutputDidDropSampleBufferFromConnection(captureOutput: any,sampleBuffer: any, connection:any): void {
              console.log("Dropping Frames");

            },
            videoCameraStarted(date){
               // console.log("CAMERA STARTED");
            }
        }, {
            protocols: [AVCaptureVideoDataOutputSampleBufferDelegate]
        });

        this._videoDelegate = VideoDelegate.new();

        //setting up camera output for frames
        this._captureOutput = AVCaptureVideoDataOutput.new();
        this._captureQueue = dispatch_queue_create("capture Queue", null);
        this._captureOutput.setSampleBufferDelegateQueue(this._videoDelegate,this._captureQueue);


        this._captureOutput.alwaysDiscardsLateVideoFrames = false;


    this._framePixelFormat = NSNumber.numberWithInt(kCVPixelFormatType_32BGRA);
    this._captureOutput.videoSettings = NSDictionary.dictionaryWithObjectForKey(this._framePixelFormat,kCVPixelBufferPixelFormatTypeKey);



        this._captureSession.addOutput(this._captureOutput);


        this._captureSession.startRunning();