Hello,
I've been trying for several long hours to extract a bitmap from a webcam
using the DSPack. I've searched the Internet and Google and I wasn't able to
do it....
The SnapShot demo works, but it uses a file, not a webcam. I tried using the
ASFCAP demo, pluging in a SampleGrabber and using the code below:
procedure TVideoForm.Button1Click(Sender: TObject);
var
oBitmap: TBitmap;
begin
oBitmap := TBitmap.Create;
try
SampleGrabber1.GetBitmap(oBitmap);
oBitmap.SaveToFile('c:\teste.bmp');
finally
oBitmap.Free;
end;
end;
but I end up with an empty file. When I debug into de GetBitmap method, the
problem happens at the following line:
hr := SampleGrabber.GetConnectedMediaType(MediaType);
The hr returns -2147220983, with on MSDN shows the following error:
VFW_E_NOT_CONNECTED The operation cannot be performed because the pins are
not connected.
I noticed that the SampleGrabber has an InputPin and an OutputPin, but I
don't know what to set them to...
As you can see, I've done my homework, and I really tried... could someone
please lend me a hand....
Thank you very much in advance.
Pascal
