Capture Image From Video Camera?

Sep 8, 2011

I've been trying to find a way to use my video camera as a webcam and do chatting from different programs including mine.

my problem is how can i capture an image from my video camera. below are camera stats[code]....

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Imports System.Drawing
Imports System.Runtime.InteropServices
Imports WIALib

[code].....

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VB and programming on Windows as such. Mostly c++/gcc/linux. I am trying to build this VB app that shows a streaming video from a camera and that needs to be overlaid with some custom graphics and text. I used the code published here: [URL] to get the capture part to work. It essentially uses the avicap32.dll that most of you would probably know.

My plan:
1) Capture frames using SendMessage(windowHandle, WM_CAP_EDIT_COPY, 0, 0) and then copy from clipboard.

2) Do whatever graphics/text overlay on the obtained bitmap

3) send it to some picturebox on some form that is being shown

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Firstly is this a reasonable way to do what I want? or is there a much more efficient/easier way to about?

Now the specific problem: From my main thread directly if I do step 1 to 3 once UIComponent.DrawImage(VideoComponent.GetBitmap()) It shows me once captured image as it should and all is good.

Just to clarify: UIComponent is an object/instance that launches the Form and owns the picturebox I want to display on. VideoComponent is an object/instance that has started the videocapture and owns the picturebox to which the video is being captured. But if I wrap the same call above in a function and launch a thread that would start with that function as its starting point, I see a blank screen. Again, for testing purpose, I am only doing step 1 through 3 just once.

The thread part of the code is like this:

Private drawthread As Thread
public sub main()
drawthread = New Thread(AddressOf threadfunc)

[CODE]........

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its VB application. 

FormBorderStyle : none (is it problem?)
Public Class Form1
Dim resim As New System.Drawing.Point
Dim X, Y As Integer

[Code]....

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[Code]...

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HTML
'---capcaptureget function
Function capCaptureGetSetup(ByVal hWnd As Integer, ByVal s As Long, ByVal wSize As Integer)
capCaptureGetSetup = SendMessage(hWnd, WM_CAP_SET_SEQUENCE_SETUP, wSize, s)
End Function

[Code]...

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I will paste the StartTuning button code " So that you may have some idea of what it is"

Private Sub startButton_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles startButton.Click
FirstLoad = 1
numberOfSamples = Convert.ToInt32(samplesPerChannelNumeric.Value)
If runningTask Is Nothing Then

[Code]...

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[Code]...

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[code]...

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