How to capture single frames from cams to memory

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2 total messages Started by Karel Thu, 07 Aug 2003 15:20

#568

Author: Karel
Date: Thu, 07 Aug 2003 15:20

20 lines
1626 bytes

I need to capture (on client demand) a single frame from one of more cams to
memory (and send it to him - it's ok). I've tried the capXXX API functions.
It would go, but:

- after connecting a capture window to a capture driver, it consumes a lot
of CPU resources. As it's a technological application I don't like it.

- when the client wants to choose another cam, the app. must use
camDlgVideoSource() and it opens a dialog. But the client is remote (over
TCP/IP), he cannot handle this dialog.

Any suggestions ?

In MSDN I found a notice about messages like DVM_FRAME, DVM_FORMAT and
function SendDriverMessage(). Is this the right way? Where could I get to
know more?

Thanks a lot

Karel

Re: How to capture single frames from cams to memory

#569

Author: John Seefeld
Date: Fri, 15 Aug 2003 14:40

5 lines
964 bytes

Hello,

You can use TVideoGrabber (http://www.datastead.com), but it is not free.

John.

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