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

[Fred Dech]

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
option.

thanks, though.

--fred

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
> 
> Fred Dech wrote:
> >Derek.
> >
> >how are you able to see all 4 sources if only one shows up as an option
> >when you are adding a VideoService in the AG NodeManagement tool?
> >
> >you set up 4 VideoProducerServices with the single source
> >that is available to you and then you are able to see all four sources
> >from the Video Sources Settings submenu of each Vic menu??
> >
> >--fred
> >
> >On Wed, Jul 13, 2005 at 09:46AM, Derek Piper said:
> >
> >>	To clarify this, you can still use all four inputs for an AG session 
> >>	- you just need to have 4 instances of VIC
> >>
> >>	Derek
> >>
> >>Thomas D. Uram wrote:
> >>
> >>>There is a vfw/wdm mapper, but it can only map a single wdm device to 
> >>>vfw, so vic only has
> >>>access to one of the four.
> >>>
> >>>
> >>>On 07/13/05 08:20, Derek Piper wrote:
> >>>
> >>>
> >>>> I believe there is a 'wrapper' in 2000/XP for WDM drivers to the VfW
> >>>>interface that VIC uses.
> >>>>
> >>>> Derek
> >>>>
> >>>>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, this
> >>>>>>>other institution needed to use the software that came with the
> >>>>>>>capture card.
> >>>>>>>
> >>>>>>>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.
> >>>>>>>
> >>>>>>>--fred
> >>>>>>>
> >>>>>>>
> >>>>>>
> >>>>>>-- 
> >>>>>>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
> >
> >
> >
> 
> -- 
> Derek Piper - dcpiper at indiana.edu - (812) 856 0111
> IRI 323, School of Informatics
> Indiana University, Bloomington, Indiana