[AG-TECH] more on multi-input capture.

Derek Piper dcpiper at indiana.edu
Wed Jul 13 08:20:10 CDT 2005

	I believe there is a 'wrapper' in 2000/XP for WDM drivers to the VfW 
interface that VIC uses.


Fred Dech wrote:
> thanks, Derek.
> but what i don't understand is this.
> if the Spectra8 currently uses WDM drivers in Windows...
> VIC relies on VFW type drivers.  that's what the problem is/was with the
> newer WDM driver Winnov Videum cards and VIC.
> i'm missing something.
> --fred
> On Tue, Jul 12, 2005 at 04:38PM, Derek Piper said:
>>	Hi,
>>	Having installed a Spectra8 after using a WinTV 150PVR, I can tell 
>>	you it's *very easy* to get going. Yes, each input installs a driver 
>>individually (4 goes round the 'found new hardware' wizard - yawn, but 
>>once it's done it's done). After that it just works like 4 individual 
>>capture cards. As mentioned before, the inherent problem with VIC not 
>>being able to differentiate between the sources and 'colliding' over 
>>what input to use still remains, but that's Windows thing and happens 
>>any time there is more than one capture device. You just have to select 
>>the 'other' source(s), whatever they may be, when the window prompts you 
>>and all sources will come up nicely.
>>	Spectra8 cards, being 4 BT878 chips, would work nicely under Linux 
>>	and not suffer from that problem (they'd just be /dev/video0, /dev/video1 
>>etc.), although I have not personally tested it.
>>	Derek
>>Fred Dech wrote:
>>>this has been covered in various ways at various times.  but i've got
>>>a new question on this subject.
>>>we had a problem with the last Winnov Videum card we spec'd for another
>>>institution because before they purchased the card the Videum been upgraded
>>>to WDM drivers.  while the VFW drivers would make it work right for AG, 
>>>other institution needed to use the software that came with the capture 
>>>i've noticed quite a few posts by people successfully using the Spectra8
>>>4 input card.  so i've now come to the point of replacing that Winnov
>>>Videum with something that will cover all the needs of our collaborators;
>>>proprietary capture software and AG.
>>>i'm looking at a web page with Spectra8 specifications.  i'm very, very
>>>surprised to see, "... each frame grabber channel has it's own WDM driver,
>>>allowing you to capture from 4 individual video channels."
>>>now i'm really confused.  is the WDM driver relatively recent for the
>>>Spectra8?  it must be... or how have people made it work well with AG...
>>>any insights would be greatly appreciated.
>>Derek Piper - dcpiper at indiana.edu - (812) 856 0111
>>IRI 323, School of Informatics
>>Indiana University, Bloomington, Indiana

Derek Piper - dcpiper at indiana.edu - (812) 856 0111
IRI 323, School of Informatics
Indiana University, Bloomington, Indiana

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