camera capture using vfw

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i am working on camera capturte project.
i have to connect two camera simultaneously.

hMyWindow1 = capCreateCaptureWindow("", WS_CHILD | WS_VISIBLE, rect1.left, rect1.top,rect1.right,rect1.bottom, hw_video1, 0);
  
SendMessage(hMyWindow2,WM_CAP_DRIVER_CONNECT,0,0);

hMyWindow2 = capCreateCaptureWindow("", WS_CHILD | WS_VISIBLE, rect2.left, rect2.top,rect2.right,rect2.bottom, hw_video2, 0);
  
SendMessage(hMyWindow2,WM_CAP_DRIVER_CONNECT,0,0);

Now second window is also get connected to first web cam for changing it to second webcam i have to use

SendMessage(hMyWindow2,WM_CAP_DLG_VIDEOSOURCE,0,0);

but i want to perform this task programmatic so that two web cams got connected on two different window n user need not to select videosource via dialog (created by using

SendMessage(hMyWindow2,WM_CAP_DLG_VIDEOSOURCE,0,0);

)

Posted 17-Jan-12 19:01pm

pranav_30

Updated 17-Jan-12 19:06pm

Prasad_Kulkarni

v2

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Member 12193780 9-Mar-16 5:11am

Hey, ever get the chance to solve this?

1 solution

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Satheesh1546 · Answer 1 · 2012-01-17T19:31:00

Solution 1

Hi,

While Sending the WM_CAP_DRIVER_CONNECT message , the third parameter refers to the DriverIndex, since you are using two webcams, you have to send two messages ,one with DriverIndex as 0, and other with DriverIndex as 1.

Cheers

Posted 17-Jan-12 19:31pm

Satheesh1546

Comments

pranav_30 18-Jan-12 1:50am

i dont think so because i have already try this thing after setting that value to "1" WM_CAP_DRIVER_CONNECT returns 0 that means driver not connected.

Satheesh1546 18-Jan-12 2:43am

Are you using the same driver for both webcams?

pranav_30 18-Jan-12 3:30am

its normal web cam. i dont know much about drivers but its microsoft wdm .

Satheesh1546 18-Jan-12 6:57am

Since, most of the Webcam's use Microsoft WDM driver. So i think connecting to two camera's simultaneously is not possible with VFW. Better to use DirectX.

pranav_30 18-Jan-12 7:36am

i am able to connect two camera simultaneously. even i have recorded video from both camera simultaneously.
i just want to do the work of "SendMessage(hMyWindow2,WM_CAP_DLG_VIDEOSOURCE,0,0);" by me itself. so that user need not to choose camera.