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 - [email protected] - (812) 856 0111 > >>>>>>IRI 323, School of Informatics > >>>>>>Indiana University, Bloomington, Indiana > >>>>> > >>>>> > >>>>> > >>>>> > >>-- > >>Derek Piper - [email protected] - (812) 856 0111 > >>IRI 323, School of Informatics > >>Indiana University, Bloomington, Indiana > > > > > > > > -- > Derek Piper - [email protected] - (812) 856 0111 > IRI 323, School of Informatics > Indiana University, Bloomington, Indiana
