Flash while switching L/R in a 3D project

relaxvideo wrote on 10/27/2016, 2:32 AM

80% of my work is in stereo 3D. I work with many dual rigs, so correcting geometry is a must in Vegas. I don't like anaglyph mode, so i use 2 scripts with hotkey, one set project properties to show Left, the other show Right. So i can easily switch between, and see if 3D is good. That worked well with my gef210 card since many years. Now i changed my card to a 750Ti, and when i switch L-R, i see a black (or a white) flash between the pictures. Very annoying. Why is that? I try to disable GPU acceleration off in preferences, but it doesnt helped.

Edit: ok, disabled Aero in win7 solved my problem.
But why?

Comments

Wolfgang S. wrote on 10/27/2016, 4:14 AM

I have done a lot of s3D projects in Vegas too, but I tend to use nvidia 3D vision with an active monitor and a quadro card. To be able to assess the disparity of the s3D video that is a typical way - beside the other way to use passive monitors. So I never used a way where I have to switch between L and R because that would not allow me to measure the disparity in the actual picture really. So the typical approaches are to use a 3D monitor with the suitable graphic card or even a Decklink card, and preview a s3D picture all the time.

So I cannot help you with this specific question really, because that seems to be very specific to the geforce cards used by you, and maybe the drivers that you use. So I am afraid that there will be no solution for that beside the idea to work with a more conventional approach?

relaxvideo wrote on 10/27/2016, 4:21 AM

Thanks for your post, but that wasn't my question..

I do work on a passive LG monitor, but for good quality output i have to check not only the disparity, but exposure, color balance, sharpness, etc. of the 2 frame, which are hardly visible when you watch in 3D with a 3D vision, so a quick left-right-left-right switch worked very well since years in my workflow..

I even often check 3D on my TD30 display closing one eye and moving my head left and right, to see disparity, etc :)

Wolfgang S. wrote on 10/27/2016, 5:36 AM

That is again something different. Especially for luminance or color adjustment I cannot switch all the time. Here I tend to use a side-by-side view (in 2D) here, especially if it is necessary to adjust luminance or colors.

But for a disparty check it is necessary to be able to measure the size of the disparity, what can be done in a nice way with the difference picture.

Overall in my workflow I do not see the need to switch between L and R really. But your workflow seems to be different.

relaxvideo wrote on 10/27/2016, 5:43 AM

yes, we are all different...

Small luminance difference is hardly visible on sidebyside picture, its a lot easier with my switching method. Of course only when there is no flash in between L-R ;)

Wolfgang S. wrote on 10/27/2016, 8:17 AM

Sure with a flash you will not see that any more.

I for my side would perfer anyway the sbs method, because I need to see L and R that during the adjustment - to be able to perform such an adjustment.

If there is an adjustment need at all - because with a TD30 there should not be the need for any adjustment. I have not seen that with my three TD10 units but also not with my Z10K unit at least. With a rig with two independent cameras that will be different.

Anyway, I do not think that this is a Vegas issue. Maybe it is an issue with the new hardware and new drivers in combination with Vegas. And I am not sure if there will be any help for that. To my opinion s3D is not in the focus of the developteam any more, given that the s3D hype is over. So I am afraid that you have to think about a workaround anyway.

relaxvideo wrote on 10/27/2016, 8:29 AM

Yes, the workaround is not to use windows Aero.

I learned this method over the years, my eyes are really trained for this switching method :) I know what picture will be good in 3D, and what is unacceptable or just hard to fuse.

My equipment is not just the TD30, as i wrote in 1st post, i work with many dual rigs, namely Gopro3+ blacks (with and without sync cable too,) two Sony WX350 for big base scenes, two Pana V700, etc. And sometimes even TD30 footage needs correction: i often see color or even exposure difference between left-right. Maybe exactly just because my switching method, and it's invisible in sidebyside mode ;-)