Webcam control displaying blank white box. can take pictures fine, no live feed.

[inquisitev]

Hi, I have been working on an application using this repo, This is my second time using this webcam control. The first time my camera showed up in the control flawlessly, This second time, its not showing up at all. I can take a picture of the web cam view and that works fine.

The two boxes on the lower half should display a direct feed of the webcam, they are your webcam control.

The included c#code is everything on my end that interacts with the webeye controls, the xaml code is the code that makes up the window that is included as a picture.

I'm wondering if I'm doing something wrong, or if there is some dependency that this webcam control would not work with.

`public void startCams() { var cams = webCameraControl1.GetVideoCaptureDevices().Where(x =>x.Name.Contains("Webcam")); var numberCam = cams.Count();

        if (numberCam == 0)
        {
            checkBox1.IsEnabled = false;
            checkBox2.IsEnabled = false;
            checkBox3.IsEnabled = false;
        }
        else if (numberCam == 1)
        {
            try
            {
                webCameraControl1.StartCapture(cams.ElementAt(0));
                checkBox1.IsEnabled = true;
            }
            catch (Exception e)
            {
                MessageBox.Show("Something went wrong, " + cams.ElementAt(0).Name.ToString() + " may be used in another program");
                checkBox1.IsEnabled = true;
            }
            checkBox2.IsEnabled = false;
            checkBox3.IsEnabled = false;

        }
    }

    private void Button_Click(object sender, RoutedEventArgs e)
    {
        startCams();
    }

    private void Button_Click_1(object sender, RoutedEventArgs e)
    {
        if (webCameraControl1.IsCapturing)
        {
            webCameraControl1.StopCapture();
        }
    }`

`<Window xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:d="http://schemas.microsoft.com/expression/blend/2008" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006" xmlns:local="clr-namespace:ScreenCaptureApp" xmlns:Wpf="clr-namespace:WebEye.Controls.Wpf;assembly=WebEye.Controls.Wpf.WebCameraControl" x:Class="ScreenCaptureApp.MainWindow" mc:Ignorable="d" Title="Name" Height="735.7" Width="809.5" ResizeMode="NoResize"

`

[jacobbo]

Hello, is this reproducible with the demo app? https://github.com/jacobbo/WebEye/tree/master/WebCameraControl/WPF/WebCameraDemo

[inquisitev]

When i used the demo app, the camera worked the first time with live feed, After that it shows the same white box that my app does, until i restart the computer.

[jacobbo]

So you press the start button, it works fine, then you press the stop button, and then, when you press the start button again, you get a white rectangle, even in the demo app, correct?

[inquisitev]

That is what happens in the demo app, it never displays a live feed in my app.

[BergEmilio]

I am in exactly the same situation. It's weird because this only happens on 1 of 3 PC I used. I think it's related to the memory. The first run just after rebooting usually OK, but just click stop button then start again, the live stream get blank. (the same as OP, it can save picture file well) This can be reproduced by WebCameraDemo or any APP using WebCameraControl. And it's not related to the camera (I tried 3 different camera)

PS: I am using VS2015 community, and my boss suggests me using newest compiler to try again (because the laptop not working correct on is newest one and has more RAM) Do you think this helpful?

[jacobbo]

I'm developing a new version of StreamPlayerControl which will be able to capture local sources, including webcams, plan to release it in a month.

[hiddenhack]

In my case i don't see live from webcam. Until some time ago it worked well, but now it doesn't work anymore. Before this defect did it only with some webcams ... although I never understood why. But it just doesn't work anymore. How can I use StreamPlayer to view from the webcam?

Thanks so much for the great job

[hiddenhack]

I have see this problem https://support.microsoft.com/en-us/help/3089247/directx-9-legacy-overlay-planes-don-t-work-with-miracast-displays-on-w

In fact the webcam is activated, but going to see in the task manager tells me GPU 0 - Legacy Overlay .... maybe this is the problem due to the update of Widnwos 10

This is only a display problem because if I take the photo, it works correctly

[jacobbo]

Quite possible. Can you try ffplay with your webcam please? I’m working on replacing DirectX with FFmpeg.

On Wed, 23 Oct 2019 at 07:11, hiddenhack notifications@github.com wrote:

I have see this problem

https://support.microsoft.com/en-us/help/3089247/directx-9-legacy-overlay-planes-don-t-work-with-miracast-displays-on-w

In fact the webcam is activated, but going to see in the task manager tells me GPU 0 - Legacy Overlay .... maybe this is the problem due to the update of Widnwos 10

This is only a display problem because if I take the photo, it works correctly

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[hiddenhack]

I have tried with FFPlay and it works very well in addition it is also very fluid

[jacobbo]

Cool. Can’t give you a final release date unfortunately, hope to finish it in a couple of weeks.

On Wed, 23 Oct 2019 at 09:37, hiddenhack notifications@github.com wrote:

I have tried with FFPlay and it works very well in addition it is also very fluid

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