CODEWITHSUNDEEP
c#aforge
Wohb
Wohb

Reputation: 39

Why is only one of my event handlers fired?

I would like to simultaneously record the video from two webcams. I am using the Aforge.Video.DirectShow package to capture each frame from the webcames. I started with the example shown on their website and just added a second camera.

But the problem I have is that only one of the event handler for handling new frames is fired. In the example code below it is _NewFrameHandler2.

I have the feeling that I am missing something obvious here... 

public class Camera
{
    private VideoCaptureDevice objCamera1;
    private VideoCaptureDevice objCamera2;

    public void Start()
    {
        FilterInfoCollection objVideoDevices = new FilterInfoCollection(FilterCategory.VideoInputDevice);
        objCamera1 = new VideoCaptureDevice(objVideoDevices[0].MonikerString);
        objCamera2 = new VideoCaptureDevice(objVideoDevices[1].MonikerString);

        objCamera1.VideoResolution = objCamera1.VideoCapabilities[objCamera1.VideoCapabilities.Count() - 1];
        objCamera2.VideoResolution = objCamera2.VideoCapabilities[objCamera2.VideoCapabilities.Count() - 1];


        objCamera1.NewFrame += new NewFrameEventHandler(_NewFrameHandler1);
        objCamera2.NewFrame += new NewFrameEventHandler(_NewFrameHandler2);

        objCamera1.Start();
        objCamera2.Start();   
    }

    public void Stop()
    {
        objCamera1.Stop();
        objCamera2.Stop();
    }


    private void _NewFrameHandler1(object sender, NewFrameEventArgs eventArgs)
    {

        Bitmap objFrame = (Bitmap)eventArgs.Frame;
        Console.WriteLine("1");
    }

    private void _NewFrameHandler2(object sender, NewFrameEventArgs eventArgs)
    {

        Bitmap objFrame = (Bitmap)eventArgs.Frame;
        Console.WriteLine("2");
    }
}

Upvotes: 1

Views: 216

Answers (1)

Wohb
Wohb

Reputation: 39

I think I have figured it out. I added a 500 ms delay in between calling the .Start() function on the camera objects. 

System.Threading.Thread.Sleep(500);

Now it works.

Upvotes: 1

Related Questions