Re: Multiple Port Grabber Cards

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From: Chris P. [MVP] (msdn_at_chrisnet.net)
Date: 08/17/04 

Date: Tue, 17 Aug 2004 14:29:58 -0400

Don Wilson wrote:
> Hi, I was pleased to find this thread. I know the good cards have a
> chip for each input, but I have been asked to use a Provideo SV140
> four-input card with only one BT878 capture chip. I would like to use
> a better card for this project but the lowest price I can find is
> around $360 for the four chip model, versus $120 for the single chip.
>
> I have the driver loaded and it only appears as a single video capture
> source "BT878 Capture 2" I can use my software, based on the AMCap
> sample and it only sees the first input. So far I have not been able
> to get the "Security Eyes" software that comes with the card to work.
> It only shows a grid of blue screens. I have filled out a technical
> support form but no response yet. Interesting though, the "Security
> Eyes" software does start the card switching inputs. After I exit
> "Security Eyes" and return to my app the preview window is switching
> rapidly between the inputs.
>
> I would appreciate anly clues as to how to control the switching in
> my app. We do not need much speed, one or two frames per second is
> fine. The application will just be saving stills when certain events
> happen.

The switching methods are proprietary. Typically cards of this type have an
SDK that allows you to control the switching mechanism. See if you can find
their SDK or keep pressing for support. Call sales if you have to.

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