Integrate the web Webcam functionality using C#-.Net and COM part VIII

It is not working. SendMessage gives zero always.....

Hi I am facing a problem the problem is that when I try to register avicap using regsvr32.exe C:\Windows\System32\avicap32.dll this show me an error the error is the module has been loaded but the but the entry point DllRegisterServer was not found. Plz help me

hey great code...but I am unable to see preview.

Hi. This code is great! But how do I change the resolution and quality of my webcamera from inside the program? and what does all these commands stand for "private const short WM_CAP = 0x400;"?

hey after using this code on runtime it is not connecting to webcam but it is giving mssg like "You Should set the Container property. will u tell me what can i do now???

how to hide select a device form ? plz tell me urgently....

it runs only onetimes and after execute it shows error...

I want to use picture on each Frame from webcam

Can you help me?

Hi I'm also facing the same problem as Lakshamkumar, anyone knows the solution..

how to get the names of the webcam devices to fill in the combobox or listbox

how to get the names of the webcam devices

Please any other web application related example for webcam image capture and store into database.

Hey, when i use the code and select an integrated webcam the deviceindex stays zero. I am using a dell e6520 latitude. any information would help

when i activate a webcam first time working but second time it's not working.it will show "select video devices".each and every time we want to restart then only it's work otherwise shows error"select video devices" how can i clear it please help me

hey i am not able to save the image

It Doesnot detect Id of The Device it shows 0 as ID

Thanx for the code.Can we save the file witout using clip board as the temporary storage location

Hi, I have implemented your code and everything compiles and runs. THe form comes up but I do not see my webcam activate or an image appear. I can press all the buttons without errors but none seem to work. Help.... This is the form I have it piped to: using System; using System.Collections.Generic; using System.ComponentModel; using System.Data; using System.Drawing; using System.Linq; using System.Text; using System.Windows.Forms; using WebCamera; namespace WindowsFormsApplication2 { public partial class Form1 : Form { public Form1() { InitializeComponent(); } private void pictureBox1_Click(object sender, EventArgs e) { pictureBox1.Image = null; } private void Form1_Load(object sender, EventArgs e) { oWebCam = new WebCamera.WebCam(); oWebCam.Container = pictureBox1; } WebCam oWebCam; private void btnStart_Click(object sender, EventArgs e) { oWebCam.OpenConnection(); } private void btnSave_Click(object sender, EventArgs e) { oWebCam.SaveImage(); } private void btnStop_Click(object sender, EventArgs e) { oWebCam.Dispose(); } private void Form1_Load_1(object sender, EventArgs e) { } private void btnStart_Enter(object sender, EventArgs e) { Button b = (Button)sender; b.BackColor = Color.Red; } private void btnStart_Leave(object sender, EventArgs e) { Button b = (Button)sender; b.BackColor = Color.Gray; } } } Else Everything is the same as the above example. The form loads but the buttons do not do anything.

I download avicap32.dll at http://www.dll-download-system.com/dlls-download-a-/avicap32.dll.html The problem is I can't find system32 folder. pls help.

nice code.thanks

not accessible

Thanks sir,Sir I got a big idea from ur code.Sir I m doing in VC++. I m able to manage so many thing but when I run ,I get""Error: PInvoke item (field,method) must be Static."". Sir please help me. Pradeep Tiwari

How to integrate web cam in asp.net webform through coding.

Great, thank you. The webcam has been connected. But I still can't save the image. There's nothing happened when I click the "snapshot" button. How could I fix it?

hello, i have a problem and i don't know how to do.I have to do a program with webcam.i must connect 6 webcams.i've done this thing manually,but i want to generate dynamically for each webcam a picturebox so i can reduce the code....but i need help...tnx

Hi Bechir, I have an iphone that has this app called iWebCamera that allows me to use my iphone camera as a web cam... the way the phone connects to the computer is via wireless network.. both have to be in the same wifi network... and the computer runs a iWebCamera application as well.. but the surprising thing is that Skype can use this camera.. so wondering if the above code can access this camera.. Have tried it but does not work.. tried using a logitech webcam and it works like a charm.. any clue why it will not work with the iphone camera. thanks :)

I have being searching for this kind of articles for quite a long time ,today ,it suddenly came to my view,i did it ,and i succeed ,I hope we'll have more communications in the near future , your sincerely reader strongmaple huibei,china

When click the Start button, a dialogwindow is opened in which written :" you should set the Conainer property" ..What to do guys you thing ?

it show me an error while registering dll file DllRegisterEntryPoint is not found so can not be registerd. plz help me out. Thanx in advance

Hi, plz tell me hw to execute? coz when i hv click on Start button nothing is happened. plz help me out

it show me an error that objetc reference is not set i m working on .net2.0 public void OpenConnection() { string DeviceIndex = Convert.ToString(DeviceID); IntPtr oHandle = Container.Handle; { MessageBox.Show("You should set the container property"); }

i got an error Object ref is not set to ref object on following line IntPtr oHandle = Container.Handle; plz help me out. waiting i m working on .net2.0

When I manually change the size of the picture box on the form the captured image doesn't take up the whole picture box instead it shrinks to 3 /4 of the size making the box smaller produces this effect On making the box larger this improves It seems to be very fussy about the actual picture box height and width can you explain how to correct this For some reason using a VB example with almost identical code doesn't do this Any idea as to why Thanks Mark

Thank you Bechir for this Great job. The code is so helpful. And I have chosen it to develop a WebCam project. But How can I achieve continuous video by it. Kindly help me. I am new in C# from Bangladesh. Thanks again. -RAHI

sir, I have problem with open connection IntPtr oHandle = Container.Handle; { MessageBox.Show("You should set the container property"); } each time this message appear and then nothing is displayed in pic box.

Nice Job !

how to integrate this functionality in a web application.

See this article and solution that doesn't use PInvoke - http://www.codeproject.com/KB/miscctrl/webcam_c_sharp.aspx

how to use same dll in java for capture the image

Can u tell me what is the maximum fps we can reach through this code

Hi Bechir, Thanks for sharing the code of yours. I'm having a problem with making the webcam work probably though. The code runs and compiles, I click the button, and I get a dialog up, where I have to choose a camera. I choose the one and only selection 'USB 2.0 Camera', and press the OK button. What happends afterwards, is a get nothing but a black image displayed in the picture box. If I try followign the code, the problems comes at the following part. // Connect to device if (SendMessage(hHwnd, WM_CAP_DRIVER_CONNECT, DeviceID, 0) != 0) { // Set the preview scale SendMessage(hHwnd, WM_CAP_SET_SCALE, -1, 0); // Set the preview rate in terms of milliseconds SendMessage(hHwnd, WM_CAP_SET_PREVIEWRATE, 66, 0); // Start previewing the image from the camera SendMessage(hHwnd, WM_CAP_SET_PREVIEW, -1, 0); // Resize window to fit in picturebox SetWindowPos(hHwnd, HWND_BOTTOM, 0, 0, Container.Height, Container.Width, SWP_NOMOVE | SWP_NOZORDER } else { // Error connecting to device close window DestroyWindow(hHwnd); } The condition stated as first, dosn't turn out being true, and the program executes the program code for the second box. I've tried c/p the code from the first block to the else block, and removed the 'DestroyWindow' call. Though I just keept my black window, and nothing happened. I'm currently on OS Win 7 with Visual Studio 2010 Express. Thanks in advance.

thnks 4 ur code.but there is problem while i save the image it get zoomed.i dont know why?

damn good job

Thank You, Your Articles is very meaning full and use full for camera programmer. My question is I am developing a Restruant Management System for our Local client I need to record video for the daily using there hidden camera Please give me the solution. I am waiting for your answar... Thanks...

When I use this code with VS 2005 .Net 2.0 framework it works perfectly when I connect an external USB camera, but when I try to use it with a built in webcam it just gives me a blank screen, nothing. Any ideas how I can get it to work with built in webcam?? Thanks in advance

Hello Bechir Bejaoui, I'm a student, I'm doing project that show camera directly on a website by asp.net. But i reasearch about asp.net not long. So, could you help me please? thank you!

hi! im looking for get a b&w image from my webcam, so i will save a lot of time to convert from color->gray scale->b&w. i guess the solution is behing "SendMessage" function, but i dont understand very well how it works. i changed the values to guess what every byte does, but i didnt get a good idea how it works. any idea?

It gives error while starting

Great work Bechir, but I encounter some problems when trying to capture the webcam image from a thread. I've created a method for retrieving the current image (a modification of the SaveImage()-method, which instead now returns an Image-object) called GetImage(). When I call the method GetImage() from a timer, it works fine. But when I try to call the same method from a thread, the variable "data" (data = Clipboard.GetDataObject();) contains null, and so the application crashes. Any ideas?

Hi, Thanks for the great code. Can I use your code in a commercial program that I am making for disabled clients?(so they can takes pictures with an AAC switch) I can put your name in the code if you like. Thanks

The information given is great. However the code seems to be incomplete. I'm relatively new to C# but not to programming, so you could say I'm not a complete newbie. The wrapper code is probably fine, but just adding the form and the code for the form doesn't make a complete working demo. It's missing a Main() as an entry point, and doesn't give the opportunity to choose a device from the list of devices. I've tried a few things, but have been unable to get it to work. Could you post an updated zip with the whole working project in it? Thanks. [update] I managed to get it to work, but it took hours of searching and trying 10,000 different things. I finally found the answers in a bit of VB.Net code that I found, and some of my own fooling around. Still, for the benefit of others, it might be a good thing to have a fully functional demo so the would-be developer can see exactly how it's all supposed to work. Thanks again. [/update]

hi i am use your code in my project but is capture image one or two time after this whin i click on start button one windos is comming for selecting your web cam device if i close my hole project and restart my project thin angain is capturing one or two images

Hi, I am getting an error which says Error 1 'Video_streaming.WebCam.Container.get' must declare a body because it is not marked abstract or extern Error 2 'Video_streaming.WebCam.Container.set' must declare a body because it is not marked abstract or extern which is related to the property Container. Please help me in this. Thank You.

Hi how do you get the image as a jpeg instead of bmp? and also how do i change the size of the preview and picture window? i have a picture box with x height and y width but the preview window is the correct height but about 1/4 smaller in width and the picture is alot smaller in height and width is there anyway to set these sizes? thanks so much for this code thanks in advance for the help

Hi, i am new to C# Programming. Well may i know what is this error about? Error 1 The type or namespace name 'WebCam' could not be found (are you missing a using directive or an assembly reference?) C:\Users\micro\Documents\Visual Studio 2008\Projects\WebCamera\WebCamera\Form1.cs 199 9 WebCamera What does it mean?

WebCam oWebCam; ----------- This type or namespace 'WebCam cannot be found. Any ideas

Same example is not working on Vista. But on XP it works properly. avicap32.dll is absent in Vista, i did copy that dll to vista and registered, still not working.

For the radar systen, how to pointing an object.(with reference to prev question) Thanks in advance...........

ok i got it working. THANKS for sharing!

I can't seem to get the buttons to respond with the code as published. I've added a break at the click event and it will not trigger. What can I be missing? Thanks for aiding a new guy, John

It is not getting clear for me that for the Property "public PictureBox Container { get; set; }" wat the code should be written, cause it is giving error like:Error 1 'WebcameProject.WebCam.Container.get': not all code paths return a value Please sugest me. Thanks in advance.

Hi, I have one question. I have 2 webcams, how can I switch devices ? If I disable frist cam, the second cam works. I changed deviceID but it doesnt work. Can you help me please ? thx

in "public class WebCam" .... public void OpenConnection() .... // Resize window to fit in picturebox //SetWindowPos(hHwnd, HWND_BOTTOM, 0, 0, Container.Height, Container.Width, SWP_NOMOVE | SWP_NOZORDER SetWindowPos(hHwnd, HWND_BOTTOM, 0, 0, Container.Width, Container.Height, SWP_NOMOVE | SWP_NOZORDER); ...

Can we use WebCame Class in WPF. PictureBox is not supported in WPF, So we have to use only Image Control. Provide some tips or solution Thanks in Advance

Great