Comments on: Webcam control with WPF or how to create high framerate player with DirectShow by using InteropBitmap in WPF application http://khason.net/blog/webcam-control-with-wpf-or-how-to-create-high-framerate-player-with-directshow-by-using-interopbitmap-in-wpf-application/ Take care of the sense, and the sounds will take care of themselves. Fri, 18 May 2012 08:56:28 +0000 hourly 1 http://wordpress.org/?v=3.3.2 By: John Roach http://khason.net/blog/webcam-control-with-wpf-or-how-to-create-high-framerate-player-with-directshow-by-using-interopbitmap-in-wpf-application/comment-page-1/#comment-5141 John Roach Fri, 20 Apr 2012 15:47:06 +0000 http://khason.net/blog/webcam-control-with-wpf-or-how-to-create-high-framerate-player-with-directshow-by-using-interopbitmap-in-wpf-application/#comment-5141 Hi, I know it has been a long time since you have posted this post. I found the article very helpful with my own project which I had some performance issues. I just have one question... I am using a c920 Logitech camera. I have noticed that some programs such as skype allow HD Video play (1080p) however when I use the code you have provided capGrabber.Width = header.BmiHeader.Width; capGrabber.Height = header.BmiHeader.Height; gives me at best a 640x480 image... and not 1080p at all.... Why is this so? Does skype send a secret command to the webcam so it can work with bigger images? Thank you for your time and help in advance. Hi,
I know it has been a long time since you have posted this post. I found the article very helpful with my own project which I had some performance issues.

I just have one question… I am using a c920 Logitech camera. I have noticed that some programs such as skype allow HD Video play (1080p) however when I use the code you have provided

capGrabber.Width = header.BmiHeader.Width;
capGrabber.Height = header.BmiHeader.Height;

gives me at best a 640×480 image… and not 1080p at all….

Why is this so?
Does skype send a secret command to the webcam so it can work with bigger images?

Thank you for your time and help in advance.

]]> By: Dominic Mertz http://khason.net/blog/webcam-control-with-wpf-or-how-to-create-high-framerate-player-with-directshow-by-using-interopbitmap-in-wpf-application/comment-page-1/#comment-4881 Dominic Mertz Wed, 18 Jan 2012 21:21:35 +0000 http://khason.net/blog/webcam-control-with-wpf-or-how-to-create-high-framerate-player-with-directshow-by-using-interopbitmap-in-wpf-application/#comment-4881 some really excellent info , Gladiolus I found this. some really excellent info , Gladiolus I found this.

]]> By: Free graphics, 3d, code snippets, PHP, HTML, JavaScript and more! http://khason.net/blog/webcam-control-with-wpf-or-how-to-create-high-framerate-player-with-directshow-by-using-interopbitmap-in-wpf-application/comment-page-1/#comment-4738 Free graphics, 3d, code snippets, PHP, HTML, JavaScript and more! Sun, 20 Nov 2011 15:11:23 +0000 http://khason.net/blog/webcam-control-with-wpf-or-how-to-create-high-framerate-player-with-directshow-by-using-interopbitmap-in-wpf-application/#comment-4738 You actually make it seem so easy together with your presentation however I to find this topic to be really something that I feel I'd never understand. It seems too complex and extremely huge for me. I am looking ahead in your next submit, I?ll try to get the dangle of it! You actually make it seem so easy together with your presentation however I to find this topic to be really something that I feel I’d never understand. It seems too complex and extremely huge for me. I am looking ahead in your next submit, I?ll try to get the dangle of it!

]]> By: Ivan http://khason.net/blog/webcam-control-with-wpf-or-how-to-create-high-framerate-player-with-directshow-by-using-interopbitmap-in-wpf-application/comment-page-1/#comment-4381 Ivan Mon, 30 May 2011 13:08:01 +0000 http://khason.net/blog/webcam-control-with-wpf-or-how-to-create-high-framerate-player-with-directshow-by-using-interopbitmap-in-wpf-application/#comment-4381 Anybody, know answer to next question: How I can fix in C# code problem: the video being upside down? Anybody, know answer to next question:
How I can fix in C# code problem: the video being upside down?

]]> By: Tosin http://khason.net/blog/webcam-control-with-wpf-or-how-to-create-high-framerate-player-with-directshow-by-using-interopbitmap-in-wpf-application/comment-page-1/#comment-4376 Tosin Tue, 24 May 2011 06:38:05 +0000 http://khason.net/blog/webcam-control-with-wpf-or-how-to-create-high-framerate-player-with-directshow-by-using-interopbitmap-in-wpf-application/#comment-4376 in case this can help someone. On the problem of the camera not being disposed properly, the problem is that the worker thread is not properly receiving the stop signal I tried Holy's post and it did not work for me. What worked for me if by replacing the thread abort logic in Runworker() // Wait for the stop signal while (!_stopSignal.WaitOne(10, true)) { Thread.Sleep(10); } with while (!_stopSignal.WaitOne(10, true)) { //Thread.Sleep(10); } This way it waits for the stop signal at least 10mil secs before aborting. I hope this helps in case this can help someone.
On the problem of the camera not being disposed properly, the problem is that the worker thread
is not properly receiving the stop signal I tried Holy’s post and it did not work for me. What worked for me if by replacing the thread abort logic in Runworker() // Wait for the stop signal
while (!_stopSignal.WaitOne(10, true))
{
Thread.Sleep(10);
}

with while (!_stopSignal.WaitOne(10, true))
{
//Thread.Sleep(10);
}
This way it waits for the stop signal at least 10mil secs before aborting. I hope this helps

]]> By: Ivan http://khason.net/blog/webcam-control-with-wpf-or-how-to-create-high-framerate-player-with-directshow-by-using-interopbitmap-in-wpf-application/comment-page-1/#comment-4358 Ivan Fri, 06 May 2011 05:27:47 +0000 http://khason.net/blog/webcam-control-with-wpf-or-how-to-create-high-framerate-player-with-directshow-by-using-interopbitmap-in-wpf-application/#comment-4358 How I can fix in C# code problem: the video being upside down? How I can fix in C# code problem: the video being upside down?

]]> By: maven http://khason.net/blog/webcam-control-with-wpf-or-how-to-create-high-framerate-player-with-directshow-by-using-interopbitmap-in-wpf-application/comment-page-1/#comment-4352 maven Thu, 05 May 2011 00:25:31 +0000 http://khason.net/blog/webcam-control-with-wpf-or-how-to-create-high-framerate-player-with-directshow-by-using-interopbitmap-in-wpf-application/#comment-4352 Hi, Can this hook up to Kinect Camera? Hi,
Can this hook up to Kinect Camera?

]]> By: Holy http://khason.net/blog/webcam-control-with-wpf-or-how-to-create-high-framerate-player-with-directshow-by-using-interopbitmap-in-wpf-application/comment-page-1/#comment-3920 Holy Fri, 27 Aug 2010 09:35:39 +0000 http://khason.net/blog/webcam-control-with-wpf-or-how-to-create-high-framerate-player-with-directshow-by-using-interopbitmap-in-wpf-application/#comment-3920 For the problem of cindex (the camera lamp is not turned off when window is closed), I solved by replacing the code (thanks Peter) code of stop routine in capdevice.cs I know for cindex it's too late but can be helpful to someone. HTH, Holy public void Stop() { if (IsRunning) { stopSignal.Set(); try { worker.Abort(); } catch (ThreadAbortException) { } finally { if (worker != null) { //worker.Join(); Release(); } } } } For the problem of cindex (the camera lamp is not turned off when window is closed), I solved by replacing the code (thanks Peter) code of stop routine in capdevice.cs

I know for cindex it’s too late but can be helpful to someone.

HTH,
Holy

public void Stop()
{
if (IsRunning)
{
stopSignal.Set();
try
{
worker.Abort();

}
catch (ThreadAbortException) { }
finally
{
if (worker != null)
{
//worker.Join();
Release();
}
}

}
}

]]> By: edwin http://khason.net/blog/webcam-control-with-wpf-or-how-to-create-high-framerate-player-with-directshow-by-using-interopbitmap-in-wpf-application/comment-page-1/#comment-3694 edwin Tue, 23 Mar 2010 22:30:15 +0000 http://khason.net/blog/webcam-control-with-wpf-or-how-to-create-high-framerate-player-with-directshow-by-using-interopbitmap-in-wpf-application/#comment-3694 Hi, I've been testing and I still see 12%CPU usage. Which is a lot higher than 2%. I would like to know why this is so much higher than with your example? Any thoughts? Ps. I'm looking to implement IP cameras on a WPF control. Why: WPF gives a lot of new features which would take forever to program in winform. Ps2. Process explorer indicates that ksproxy.ax is using 10% CPU. Hi, I’ve been testing and I still see 12%CPU usage. Which is a lot higher than 2%. I would like to know why this is so much higher than with your example? Any thoughts?
Ps.
I’m looking to implement IP cameras on a WPF control. Why: WPF gives a lot of new features which would take forever to program in winform.
Ps2.
Process explorer indicates that ksproxy.ax is using 10% CPU.

]]> By: Federico http://khason.net/blog/webcam-control-with-wpf-or-how-to-create-high-framerate-player-with-directshow-by-using-interopbitmap-in-wpf-application/comment-page-1/#comment-3646 Federico Fri, 05 Mar 2010 14:22:01 +0000 http://khason.net/blog/webcam-control-with-wpf-or-how-to-create-high-framerate-player-with-directshow-by-using-interopbitmap-in-wpf-application/#comment-3646 Hello. Can anybody send me more information about: - Config Image Resolution - Use Zoom Thanks. Hello.
Can anybody send me more information about:
- Config Image Resolution
- Use Zoom
Thanks.

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