EMGUCV Multiple webcam

Question

i am trying to use 3 cameras to capture photos however i am unable to produce all 3 of it. i have 2 external webcam ( Microsoft Cinema Webcam ) and 1 internal laptop camera , i used my previous laptop and it works perfectly however when i tried to use another laptop it is unable to work.

I tried some ways like testing each camera and i found out that i can use only 2 webcam at the same time using my program despite having 3 at the other laptop.

I am unable to make my laptop camera work . Any idea how?

Any idea how to get this work?

namespace Camera
{
    public partial class CameraOutput : Form
    {
        private Capture _capture, _capture2, _capture3;
        private bool captureInProgress;
        private bool saveToFile;

        private Font font = new Font("Calibri", 14);

        public CameraOutput()
        {
            InitializeComponent();
        }

        private void ProcessFrame(Object sender, EventArgs arg)
        {
            Image<Bgr, Byte> ImageFrame = _capture.QueryFrame();
            Image<Bgr, Byte> ImageFrame2 = _capture2.QueryFrame();
            Image<Bgr, Byte> ImageFrame3 = _capture3.QueryFrame();

            CamImageBox.Image = ImageFrame;
            CamImageBox2.Image = ImageFrame3;
            CamImageBox3.Image = ImageFrame2;


            //image_Form1 = Image.FromFile(@"C:\center90\center90(1).jpg");


            if (saveToFile)
            {
                ImageFrame.Save(@"C:\Users\L31101\Desktop\Camera\Camera\bin\Debug\left\left.jpg");
                ImageFrame3.Save(@"C:\Users\L31101\Desktop\Camera\Camera\bin\Debug\center\center.jpg");
                ImageFrame2.Save(@"C:\Users\L31101\Desktop\Camera\Camera\bin\Debug\right\right.jpg");
                //System.Drawing.Image img = ImageFrame3.ToBitmap();
                //image_Form1 = img;
                CameraCoordinates form2 = new CameraCoordinates(ImageFrame3.ToBitmap(),ImageFrame.ToBitmap(),ImageFrame2.ToBitmap());
                form2.Show();
                saveToFile = !saveToFile;
            }


        }

        private void CameraOutput_Load(object sender, EventArgs e)
        {
            #region if capture is not created, create it now

            pictureBox1.Enabled = true;

            if (_capture == null)
            {
                try
                {
                    _capture = new Capture(1);
                }

                catch (NullReferenceException excpt)
                {
                    MessageBox.Show(excpt.Message);
                }
            }

            if (_capture2 == null)
            {
                try
                {
                    _capture2 = new Capture(2);
                }

                catch (NullReferenceException excpt)
                {
                    MessageBox.Show(excpt.Message);
                }
            }

            if (_capture3 == null)
            {
                try
                {
                    _capture3 = new Capture(3);
                }

                catch (NullReferenceException excpt)
                {
                    MessageBox.Show(excpt.Message);
                }
            }
            #endregion

            if (_capture != null)
            {
                if (pictureBox1.Enabled == false)
                {
                    Application.Idle -= ProcessFrame;
                }
                else
                {
                    Application.Idle += ProcessFrame;
                }

                captureInProgress = !captureInProgress;
            }

            if (_capture2 != null)
            {
                if (pictureBox1.Enabled == false)
                {
                    Application.Idle -= ProcessFrame;
                }
                else
                {
                    Application.Idle += ProcessFrame;
                }

                captureInProgress = !captureInProgress;
            }

            if (_capture3 != null)
            {
                if (pictureBox1.Enabled == false)
                {
                    Application.Idle -= ProcessFrame;
                }
                else
                {
                    Application.Idle += ProcessFrame;
                }

                captureInProgress = !captureInProgress;
            }
        }

        private void ReleaseData()
        {
            if (_capture != null)
            _capture.Dispose();

            if (_capture2 != null)
                _capture.Dispose();

            if (_capture3 != null)
                _capture.Dispose();
        }

        Image image_Form1;
        public Image Image_Form1
        {
            get { return image_Form1; }
            set { image_Form1 = value; }
        }

        private void pictureBox1_Click(object sender, EventArgs e)
        {
            saveToFile = !saveToFile;
            MessageBox.Show("Done");
        }

Answer 1

_capture = new Capture(1);

You're indexing from 1, should you be indexing from 0?