Page 1 of 1
Render freeze on DVI Input Switch
Posted: 13 Aug 2012, 16:54
by pixelrock
Hi,
we've got a problem here with live input DVI switching: Ventuz pauses rendering for ~4 seconds until the DVI Signal is back.
Is there any way to circumvent this behaviour ?
Setup:
we have a hdmi&div switching matrix, the signal comes in via a deltacast dvi.
Deltacast driver 5.3.13.0 (according to Windows device manager)
Ventuz Version 64x 3.07
Thank you,
Matthias
Re: Render freeze on DVI Input Switch
Posted: 15 Aug 2012, 15:15
by chriss0212
hi mathias
i would think you have this problem because your sources are not genlocked...and maybe have different resolutions?! so it could be, that the deltacast needs to make a new setup on this input...what of course takes time!
greetz
christian
Re: Render freeze on DVI Input Switch
Posted: 15 Aug 2012, 17:32
by Chris
I agree, it does sound like a sync issue from your external source. Are you using a "seamless" switcher??
chris
Re: Render freeze on DVI Input Switch
Posted: 16 Aug 2012, 14:48
by pixelrock
Hi,
yeah it looks like the switcher is not seamless (resolutions do indeed change, they come from varying sources like iPad, VGA etc.).
The switcher is a Crestron md-dm16x16, unfortunately I don't know much about this system. I'm on the software side, so I thought I could
compensate the switching time by showing some nice animations in the meantime, but unfortunately Ventuz freezes completely making all transitions
between inputs useless.
We have tried to use a Lightware HDCP Manager, but even with this inbetween Ventuz still freezes.
Any other suggestions?!
Thanks,
Matthias
Re: Render freeze on DVI Input Switch
Posted: 16 Aug 2012, 17:27
by chriss0212
you could insert a barco image pro hd between your matrix and your dvi input. on this way you should have allways a stable input signal on your dvi card...but an image pro is a very expensive part in your chain...if you need it just for a while you should rent it!
greetz
christian
Re: Render freeze on DVI Input Switch
Posted: 17 Aug 2012, 14:53
by Chris
Image pro is a good option as it does a great job of scaling any input to give you any chosen output
good to get you out of trouble at the last minute sometimes
or you can get a seamless switcher, barco Dcs 200, various Analog Way switchers, Extron if you need something a bit cheaper, and lots others
also.....rent first buy later
Re: Render freeze on DVI Input Switch
Posted: 20 Aug 2012, 11:08
by pixelrock
Hey thanks everyone,
hm looks like we have to go for the seamless switch / scaler thing. I'm just a little bit surprised that the whole machine and the ventuz rendering freezes for several seconds.
Would be no problem if just the input signal freezes, I already do a fade in / fadeout to prevent graphical glitches – but with the whole rendering coming to a stop there's no way
to hide the switching...