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  4. selecting a device without UI

selecting a device without UI

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  • J Justin Tay

    Does sending the WM_CAP_DRIVER_CONNECT message not work?

    SendMessage(hwndVideo, WM_CAP_DRIVER_CONNECT, camIndex, 0L);

    or the macro

    capDriverConnect(hwndVideo, camIndex);

    What problems are you facing?

    V Offline
    V Offline
    V_shr
    wrote on last edited by
    #17

    when I put camIndex , nonzero , it doesn't work , but windows recognizes both of webcams .

    J 1 Reply Last reply
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    • V V_shr

      when I put camIndex , nonzero , it doesn't work , but windows recognizes both of webcams .

      J Offline
      J Offline
      Justin Tay
      wrote on last edited by
      #18

      Um. Windows recognizes both webcams as in... they both have VFW drivers? Did you see the webcams listed in the listbox of this application?

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      • J Justin Tay

        Um. Windows recognizes both webcams as in... they both have VFW drivers? Did you see the webcams listed in the listbox of this application?

        V Offline
        V Offline
        V_shr
        wrote on last edited by
        #19

        Yes I can choose between two webcams in windows UI dialog . but as mentioned above when I put the camIndex=1 it doesn't recognize it.

        J 1 Reply Last reply
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        • V V_shr

          Yes I can choose between two webcams in windows UI dialog . but as mentioned above when I put the camIndex=1 it doesn't recognize it.

          J Offline
          J Offline
          Justin Tay
          wrote on last edited by
          #20

          What windows UI dialog? Is it present in the SelCapDrvDlg in this application? Set a breakpoint in main.cpp line 199. What are the indexes of the 2 webcams you are interested in?

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          • J Justin Tay

            What windows UI dialog? Is it present in the SelCapDrvDlg in this application? Set a breakpoint in main.cpp line 199. What are the indexes of the 2 webcams you are interested in?

            V Offline
            V Offline
            V_shr
            wrote on last edited by
            #21

            it reaches the breakpoint when i=0 and it doesn't reach in i=1

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            • V V_shr

              it reaches the breakpoint when i=0 and it doesn't reach in i=1

              J Offline
              J Offline
              Justin Tay
              wrote on last edited by
              #22

              And there we have it. One of your webcams only has a WDM driver. You would have to write a DirectShow application.

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              • J Justin Tay

                And there we have it. One of your webcams only has a WDM driver. You would have to write a DirectShow application.

                V Offline
                V Offline
                V_shr
                wrote on last edited by
                #23

                how can I write a DirectShow program , If you have time , please tell me . thank you

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                • V V_shr

                  how can I write a DirectShow program , If you have time , please tell me . thank you

                  J Offline
                  J Offline
                  Justin Tay
                  wrote on last edited by
                  #24

                  If you have VC7+, download and install the latest Platform SDK. Go to http://tmhare.mvps.org/downloads.htm[^] to get the project files for the samples since Microsoft has for some reason stripped it out. Then go have a look at the PlayCap sample application in "..\Program Files\Microsoft Platform SDK\Samples\Multimedia\DirectShow\Capture\PlayCap" If you have VC6 though, you would have to grab an old DirectX SDK, maybe 2003 or 2004.

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                  • J Justin Tay

                    If you have VC7+, download and install the latest Platform SDK. Go to http://tmhare.mvps.org/downloads.htm[^] to get the project files for the samples since Microsoft has for some reason stripped it out. Then go have a look at the PlayCap sample application in "..\Program Files\Microsoft Platform SDK\Samples\Multimedia\DirectShow\Capture\PlayCap" If you have VC6 though, you would have to grab an old DirectX SDK, maybe 2003 or 2004.

                    V Offline
                    V Offline
                    V_shr
                    wrote on last edited by
                    #25

                    what is VC7+ and SDK

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                    • V V_shr

                      how can I write a DirectShow program , If you have time , please tell me . thank you

                      J Offline
                      J Offline
                      Justin Tay
                      wrote on last edited by
                      #26

                      VC7+: Microsoft Visual C++ 2002/2003/2005 SDK: Software Development Kit http://www.microsoft.com/downloads/details.aspx?FamilyId=484269E2-3B89-47E3-8EB7-1F2BE6D7123A&displaylang=en[^]

                      V 1 Reply Last reply
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                      • J Justin Tay

                        VC7+: Microsoft Visual C++ 2002/2003/2005 SDK: Software Development Kit http://www.microsoft.com/downloads/details.aspx?FamilyId=484269E2-3B89-47E3-8EB7-1F2BE6D7123A&displaylang=en[^]

                        V Offline
                        V Offline
                        V_shr
                        wrote on last edited by
                        #27

                        I dont Have visual C++ , I just have visual studio .NET and CBuilder And I prefer to write this program in CBuilder . -- modified at 10:09 Thursday 4th May, 2006

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                        • V V_shr

                          how can I write a DirectShow program , If you have time , please tell me . thank you

                          J Offline
                          J Offline
                          Justin Tay
                          wrote on last edited by
                          #28

                          Your copy of Visual Studio .NET doesn't come with the C++ compiler? I never used CBuilder before so I guess you're on your own in building/getting compatible libs. Here's a link to get you started. http://www.geocities.com/foetsch/borlibs/[^] http://clootie.narod.ru/cbuilder/index.html[^]

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                          • J Justin Tay

                            Your copy of Visual Studio .NET doesn't come with the C++ compiler? I never used CBuilder before so I guess you're on your own in building/getting compatible libs. Here's a link to get you started. http://www.geocities.com/foetsch/borlibs/[^] http://clootie.narod.ru/cbuilder/index.html[^]

                            V Offline
                            V Offline
                            V_shr
                            wrote on last edited by
                            #29

                            thanks a lot

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