Angus Dorbie (dorbie++at++sgi.com)
Mon, 14 Jun 1999 13:09:26 -0700
It seems like we agree my original comments still stand. Genlock the
ONYX2 to the O2.
Cheers,Angus.
Nigel Caughey wrote:
>
> Hi Angus,
>
> > There is no genlock in on the O2 so as I suggested you need to genlock
> > the ONYX2 to the sync from the O2. It's all video sync anyway so from a
> > software point of view there should be no discernable difference.
>
> This is not strictly true, there is genlock for the video output of the O2, but
> not for
> the graphics pipe (& yes this is very annoying).
>
> > This would mean getting separate sync and repeating that to the Genlock
> > In on the iR pipe.
> >
> > The O2 video does support video in and MAYBE it would tie 60Hz video to
> > the ntsc input and you could then vampire the NTSC from the iR composite
> > out and feed that into the O2 analog, but I doubt the O2 actually syncs
> > it's video to ntsc in.
>
> Well it definitely does to PAL, so I would be very surprised if not to ntsc, but
> as
> I said before remember that the graphics pipe is not genlocked to the video pipe,
>
> so you will drop frames & the only locked signal is the video out (as opposed to
> monitor).
>
> > > Can you explain that in a little more detail?
> > >
> > > I'm generating my sync on my Onyx2, pipe0, and I want my O2's to sync to it.
>
> I've cut in a bit late, but I suspect you want to sync the monitor outputs in
> which case
> Angus is totally correct, the graphics pipe on an O2 is not genlockable (well you
> can actually
> set the kernel variable, but all hell breaks lose).
>
> Cheers
>
> Nigel
>
> --
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