aforge | PCL version of AForge.NET Framework

I have seen various tutorial like this on how to make a video from webcam, show and record it. What I would like now is to be able to do the same with the desktop so that I can cross-reference the computer activity with the external world. So what I would like is to be able to record a video of what happens on the computer possibly usig AForge. I found no reference about that, is it therefore impossible to do with Aforge?

--ADD--

I have implemented the proposed solution as below:

Thanks

but when I look at the png is all black. The saving procedure is correct for when I save the webcam frame it is ok. Could you please tell me what is wrong in my adaptation from your code?

Thanks

I am trying to write a code for contrast but contrast depends on threshold value.What I mean is using entered threshold value or if it is not entered by user I want to write a default value for threshold.As far as I know I should do this by using constructor but I am not good at object oriented programming.How can I do that?

Here is the code for Form1.cs:

I am trying to write a sobel filter.In a nutshell I should turn the image into the grayscale filter then I should apply sobel filter to the image.I found a code but I am not good at object oriented programming.How can I call the function when I push the button?

Here is the code:

I am trying to make a simple form to capture images from webCam, on my .net5 project however I could not seem to find a simple solution for this. I try AForge, OpenCVSharp.. they do not support .net5 yet I got a project to run but it turns out just blank (no webcam image). I google search and try almost everything I can found on my end.

I am wondering if anyone got any suggestions for a solution to this problem prefer opensource components

edit1: I am using Winforms for desktop applications.

i am working on a app that can record video/audio using webcam and microphone while also displaying it on winforms.

My first question ever on SO, apologies if something is missing or wrong.

I currently have a WPF app that hooks onto a camera using Aforge.net and shows the feed. However this does not seem to work when another application is using the camera.

This is how I setup the feed.

Following online samples, I have written qrcode web cam reader in c# uzing zXing and aForge libraries. I have encountered very weird behavior of System.Windows.Forms.Timerin C#: I have dropped it on widows form, enabled it, set interval 1 second and attached tick eventhandler.

Everything seems to work normally, but when i resize(enlarge) the window to particular size, or if i make window fullscreen, the times tick event stops firing. When i bring window from fullscreen to normal size, or when i reduce window size, the timer starts again by itself automatically.

I am using following version of visual studio:

Here is my code:

I am writing a C# WPF application, I am using the AForge library for video streaming. I wanted to deploy the application, because everything worked on the first pc.

Than I deployed it and on the other pc I get the following Error:

"Must create DependencySource on same Thread as the DependencyObject even by using Dispatcher"

This is the source Code, I am calling it on every new Frame which I get from the WebCam