Re: how to do real-time video processing without showing the preview window?

From: "temp12000@xxxxxxxxx"

Is there any way so that I don't need show (or use) the
preview window and can access the image (video) data
directly? All I need do is some calculation.

That depends on what capture method you are using.

It doesn't matter as long as use webcam to get the image
data.

What do you mean it doesn't matter? If you want to keep
using whatever method you are using now, it matters.
Otherwise, you need DirectShow.

The documentation has a whole section on video capture and
the SDK contains the source code of a complete capture
application, that is the AmCap sample. Notice that a webcam
is just another video capture device (unless the webcam you
are using only provides proprietary drivers).

Once you know how to capture, you can process the frames in
real-time by replacing the muxer filter with a custom
sink/renderer or a SampleGrabber+NullRenderer. Both methods
have been discussed many times, so you can find details by
searching the history of this group on groups.google.com.


--
// Alessandro Angeli
// MVP :: DirectShow / MediaFoundation
// mvpnews at riseoftheants dot com
// http://www.riseoftheants.com/mmx/faq.htm


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