select video source

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2 total messages Started by luca Mon, 13 Dec 2004 16:55

#256

Author: luca
Date: Mon, 13 Dec 2004 16:55

15 lines
1334 bytes

excuse me for restarting this thread.

We must distinguish bitween driver and video source.

Logitech USB Video Camera,   Version:  5.4.4.1005
Microsoft WDM Image Capture (Win32),   Version:  5.0.2195.3649

are two drivers, the first one from Logitech  the second from Microsoft.
changing the driver dont't affect the video source.
the only way that I found to change the  video source is to use
capDlgVideoSource(), but this is a dialog window, I need to do this by code.
May be that multimedia function don't implement the specification of twain
drivers?

luca

Re: select video source

#257

Author: Remy Lebeau (TeamB)
Date: Mon, 13 Dec 2004 19:20

29 lines
1911 bytes

"luca" <lct@tele2.it> wrote in message
news:41bdc99f$1@newsgroups.borland.com...

> We must distinguish bitween driver and video source.
>
> Logitech USB Video Camera,   Version:  5.4.4.1005
> Microsoft WDM Image Capture (Win32),   Version:  5.0.2195.3649
>
> are two drivers, the first one from Logitech  the second from
> Microsoft. changing the driver dont't affect the video source.
> the only way that I found to change the  video source is to use
> capDlgVideoSource(), but this is a dialog window, I need to do
> this by code.

You already know how to select the source programmally.  That is what the
capGetDriverDescription() and capDriverConnect() functions are for.  Despite
their names, they enumerate/connect *devices and drivers*, not just drivers
alone.  Even Microsoft says that to connect to a particular device, you use
these functions.

Alternatively, look at the capSetMCIDeviceName() macro.  This works only if
you are using MCI-enabled devices, though.

Alternatively, maybe you can look at using DirectX instead - specially,
DirectShow.


Gambit

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