[AG-TECH] more on multi-input capture.
dcpiper at indiana.edu
Wed Jul 13 14:54:27 CDT 2005
It will happen regardless of the type of capture device, just so that's
clear. If you have more than one device that captures video, if it's a
USB camera or capture card, then you'll have that problem with Windows.
Fred Dech wrote:
> hi Derek.
> i see. that's useful information. the EVERY TIME clause is a real
> drag, though. in the case i'm thinking about, using linux is not an
> thanks, though.
> On Wed, Jul 13, 2005 at 02:15PM, Derek Piper said:
>> No, I explained how that part works my previous post. Maybe a
>> diagram would be good.
>>VIC -> 'Microsoft WDM Image Capture' -> Source0
>>VIC -> 'Microsoft WDM Image Capture' -> Source1
>>VIC -> 'Microsoft WDM Image Capture' -> Source2
>>VIC -> 'Microsoft WDM Image Capture' -> Source3
>> VIC only binds to 'Microsoft WDM Image Capture', *it doesn't know
>> about the sources beyond that*. Upon invocation, the WDM driver will choose
>>the first 'source' it can find, since none was given. This leads to all
>>four VICs choosing Source0 (probably) and 3 of them will not be able to
>>get it and will complain by putting up a selector box to choose another
>>source. So, you go ahead and choose another source, i.e. Source1 for the
>>first one you have to alter, then Source2 for the other one etc. All 4
>>VICs will then be up and running. Unfortunately you will need to do this
>>EVERY TIME you change venues. If it drives you crazy, use a Linux box
>>for video from multiple sources.
Derek Piper - dcpiper at indiana.edu - (812) 856 0111
IRI 323, School of Informatics
Indiana University, Bloomington, Indiana
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