Thread Subject:

VCAPG2 calling

Hello Everyone,

I am having a problem using a dll called vcapg2. I tried directly calling this dll from the command window, however, matlab won't recognize the dll that I call. It keeps giving me this message

??? Undefined function or variable 'vcapg2'.
 
I have already made sure that I am using the correct path and the dll appears in the CurrentFolder window. I can't use MATLAB's loadlibrary function because the dll doesn't have a header file. I do have however the C++ version of the dll but I don't know how to use it. Any help would greatly be appreciated.

in matlab m-file write program like this
clear all;
cardnum=vcapg2; % you will get available video capture devices number usually 1
close all;figure(1);set(1,'doublebuffer','on');
% capture mode
for i=1:100
aa=vcapg2;% grabbing camera image.
subplot(2,1,1);imshow(aa);subplot(2,1,2);imshow(diff(double(aa(:,:,1)),[]));
drawnow;% this is important to view realtime.
end


you definitely execte the program

Hi,

are you shure that you have a correct version of vcapg2 for your matlab version?. Older versions of vcapg2 with extension .dll may not run use matlab version 2006b or later. The version must have extension like mex32 (mex64) for 32bit (64bit) matlab version. In total vcapg2 is a directshow application which can be linked for matlab version having the source code. If you sent me an email I can provide the lastest (tested) vcapg2 version for matlab 32 and 64 bit up to matlabversion 2010b.

best regards

Heinz-Georg Fehn


"Rommel " <rommel.alonzo@mavs.uta.edu> wrote in message <i9noc0$s8c$1@fred.mathworks.com>...
> Hello Everyone,
>
> I am having a problem using a dll called vcapg2. I tried directly calling this dll from the command window, however, matlab won't recognize the dll that I call. It keeps giving me this message
>
> ??? Undefined function or variable 'vcapg2'.
>
> I have already made sure that I am using the correct path and the dll appears in the CurrentFolder window. I can't use MATLAB's loadlibrary function because the dll doesn't have a header file. I do have however the C++ version of the dll but I don't know how to use it. Any help would greatly be appreciated.

"Heinz-Georg Fehn" <hgfehn@gmx.de> wrote in message <ig5hp7$m45$1@fred.mathworks.com>...
> Hi,
>
> are you shure that you have a correct version of vcapg2 for your matlab version?. Older versions of vcapg2 with extension .dll may not run use matlab version 2006b or later. The version must have extension like mex32 (mex64) for 32bit (64bit) matlab version. In total vcapg2 is a directshow application which can be linked for matlab version having the source code. If you sent me an email I can provide the lastest (tested) vcapg2 version for matlab 32 and 64 bit up to matlabversion 2010b.
>
> best regards
>
> Heinz-Georg Fehn
>
Hi Heinz,
Can you send me the latest version for matlab 64 bit and version 2012a?
Best,