🚀 go-pugleaf

Hi

Try the following

define a Callback for single frame capture ......

LRESULT CALLBACK FrameCallbackProc(HWND, LPVIDEOHDR) ;

Create a capture window, for example .....

hwCap = capCreateCaptureWindow("My Window", WS_CHILD |  WS_VISIBLE,
0,0,640,480, hWndParent, 0);

Check that you have attached to a valid driver ........

ok = capGetDriverDescription( 0, (char*) &gszCapDrvName, 200,  (char*)
&gszCapDrvDesc, 200 ); 

where gsznnnn are pointers to char buffers


Make a call to the Capture driver to request call back on frame
preview ......

capSetCallbackOnFrame(hwCap, FrameCallbackProc) ;

Write a callback routine  to access the data

LRESULT CALLBACK FrameCallbackProc(HWND hWnd, LPVIDEOHDR lpVHdr)
{
//  hWnd:       Application main window handle
//  lpVHdr:     long pointer to VideoHdr struct
//  lpVHdr->lpData points to the actual data in the buffer

}
See the microsoft SDK example AVICap for more  information

Hope this helps


On Mon, 31 Jan 2000 21:15:47 +0200, Lazikas o Pontios
<lazikas@iname.com> wrote:

>Hi to all. Where can i find some info about Video for Windows ? The
>standard MS SDK help file shipped with Delphi has no info about.
>
>What i wanna do is grab a frame from a video camera, and manipulate it
>on the fly.
>What i have achived till now (by reading code from other freeware
>applications) is to grab the frame and save it into a file or grab an
>avi by sending commands to video handle. But i have no info about how
>and where frame is stored in memory or what is the procedure tha is
>followed by VfW.
>
>Thanks in Advance,
>
>Lazikas
>

Mike
support@rapidautomation.co.uk
http://www.rapidautomation.co.uk/

Thanks a lot Mike, i'll give it a try :)

Lazikas

Mike wrote:

> Hi
>
> Try the following
>