Signifcant Grading Latency On the Video Out Monitor

[Christopher Tay]

Try installing your Decklink card in slot 4 and see if it makes any difference.

Or swap the slots between the GT120 and GTX285 just for testing purpose.

-chrispy

[Marcus Smith]

Hey Chrispy,

Will try the slot change.

But just to clarify – are you not getting any noticeable latency whilst grading in 1080 with just one node and UC QT? I’m currently trying to work this through with Black Magic, and although the details aren’t fully confirmed yet – it seems as if they are suggesting that there in an inherit latency in the design of the Mac system. I am so surprised to hear this that I’m very curious if anyone else has noticed it. I mean, it should be really obvious! But I know a lot of people have come from Apple Color and may be used to grading with latency, and so have not reported it.

Thanks again,

Marcus.

[Robin Erard]

Hello,

Same problem for a long time… since the first version 7.0.

I have about 10 frames latency between the GUI and the Projector. It’s not a problem for the play, but it’s a problem for the grading, because when I grade, I see the result about 1/3 second to late. But from the begining I didn’t receive any precise answer about that.

My configuration :

MacPro 8 x 2.26
16 GigaRam
Decklink Hd Extrem 3
Hdlink displayport
GT120 PCIe Slot-2
GTX 285 PCIe Slot-1
Decklink Slot-4

réalisateur, scénariste, monteur
http://www.robinerard.ch

[Marcus Smith]

Do you get the same delay when grading straight from an sdi monitor, not just the projector? Cheers, Marcus.

[Robin Erard]

Hello,

Yes I have the same delay, it’s not from the projector. It really from the software to the blackmagic HdExtrem3.

All the best

Robin

réalisateur, scénariste, monteur
http://www.robinerard.ch

[Robert Due]

I made this same mistake. I have one question though, will reinstalling Resolve erase my existing projects / database? I need to go back to the recommended drivers and don’t want to lose everything. I can of course back up all the projects. That is done via the config page (Export +) right?

Robert Due
Editor / Colorist
INDEPENDENT EDIT

[Marcus Smith]

Hi Robert,

Re-installing your Davinci from the CD is the way to go to get back the old decklink drivers. This won’t erase your projects as that’s handled by the Postgresql database independently.

Cheers,

Marcus.

[Robert Due]

Thanks Marcus,

Make sure you upgrade to the current version of Resolve after reinstalling from the disc. Your database won’t be recognized. I thought I lost everything, but when I upgraded to 7.1.1, all my old projects were there again – unharmed.

Robert Due
Editor / Colorist
INDEPENDENT EDIT

[Michael Cinquin]

Yes we all have this latency, and I think it’s the main difference which is left between the davinci and the systems 10x more expensive.

See also this thread :
https://forums.creativecow.net/thread/277/2950

Michael Cinquin

Final Cut Pro – Avid Media Composer editor
DaVinci – Color – Baselight colorist
Color profiles for Color
http://www.michaelcinquin.com/tools : tools for FCP | Color | RED | subtitles | Cinema Tools | Timecode – Keycode calculator

[Robin Erard]

hello,

I think so… but it could be good if in “stop mode” this latency could be reduced. In playback mode, no problem if I have a latency. I just want that my manipulations (in stop mode) appears in realtime.

best

Robin

réalisateur, scénariste, monteur
http://www.robinerard.ch