Enabling deinterlacing option greyed

Sorry for the similar repost, but now this is in the correct DR forum.

I've recently tried the DR17 beta 3 and tonight I've just installed 4 in hopes of a 'fix'.

I've been importing 24 and 29.97 NTSC and HD projects from other platforms AS WELL AS creating from scratch with those settings and am not seeing the option that I used to have per clip to Enable Deinterlacing. If I load in a previous project that was started in DR16.1, I still have the deinterlace option.

I've poked around the Project Settings -> Timeline Format and have noticed that the checkbox for "Enable interlace processing" is greyed out. I'm certain that is the reason why Enable Deinterlacing is not even an option. SO, the question is how do I make the Enable Interlace Processing so it is no longer greyed out? I haven't been able to find even a clue in the forums or elsewhere.

I've attempted to match all the Project Settings from my older projects to the newer and that doesn't seem to make a difference. What is the trick that I am missing?

Please advise, thanks!

De-interlacing is a Studio feature. Do you have inadvertently installed the free version?

you have inadvertently installed the free version?

I had to double-check, but I DID install the Studio version and the dongle is inserted. Plus, as I mentioned the previous projects deinterlacing still is available to modify as needed.

Seems to be a bug under Windows. It works as expected here.
You don't need to enable interlaced export, you can de-interlace into double fps progressive just fine.

Just in case, have you unchecked the "Enable Video Field Processing" in the Master Setting ?

Just in case, have you unchecked the "Enable Video Field Processing" in the Master Setting ?

I cannot enable that because it is greyed out. So that is my inquiry as to what causes it and what can I do make it not greyed out.

[Dwaine Maggart]

If you bring a Resolve 16 project that has interlaced clips into 17, you will see the Enable Deinterlacing checkbox in Clip Attributes for those clips. And you'll continue to see that if you add additional interlaced clips to the project.

But in a from scratch Resolve 17 project, when you have an interlaced clip in the Media Pool, it's automatically in the deinterlacing mode, with the Auto Field mode selected in the Field Dominance setting.

Also be aware that the default deinterlacing quality mode is Normal. This is selected in Project Settings - Image Scaling - Deinterlace quality

Options are Normal, High and DaVinci Neural Engine.

Hmmm... okay. I suppose ya can't have everything. I have some old captured VHS footage that even though interlaced, because of the pseudo-TBC that I run it thru for stability, also gets sent out as progressive.

So, I suppose there isn't a way to force deinterlacing a clip. Maybe in the future, a port something like YADIF (yet another deinterlace filter) for those who wish to have that capability.

I can force de-interlacing just fine in 17 by changing the field dominance.

If you want a free tool, give QTGMC a try, it's excellent.

In version 16 you could choose between »Normal« and »High« in the settings under Image Scaling for Deinterlace quality, but it had no effect. Now I tried version 17 (Build 18) and you can choose between »Normal«, »High« and »Davinci Neural Ennine«. »High« and »Davinci Neural Engine« work with the typical studio version watermark, but with »Normal« it also works in the free version fine.

If you bring a Resolve 16 project that has interlaced clips into 17, you will see the Enable Deinterlacing checkbox in Clip Attributes for those clips. And you'll continue to see that if you add additional interlaced clips to the project.

But in a from scratch Resolve 17 project, when you have an interlaced clip in the Media Pool, it's automatically in the deinterlacing mode, with the Auto Field mode selected in the Field Dominance setting.

So there is no way of doing an interlaced project in R17?

OK - with testing it seems that a 50i source in a 50i timeline exported *is* 50P but other NLEs (Avid, PP) will apply a 200% speed playback if you put a 50P clip in a 25i timeline - so you get 50 interlaced fields from the 50 progressive frames.

Also be aware that the default deinterlacing quality mode is Normal. This is selected in Project Settings - Image Scaling - Deinterlace quality

Options are Normal, High and DaVinci Neural Engine.

Couldn't figure out why my exports were taking so long... forgot I had switched that deinterlace setting

NB (for me)

Normal = 4s = 0.4xRT to render
High = 6s = 0.6xRT to render
Neural = 60s = 6xRT to render

So what to do exactly in DR17 to remove interlace using neural engine, what and where to click?
Thank you in advance.

If you bring a Resolve 16 project that has interlaced clips into 17, you will see the Enable Deinterlacing checkbox in Clip Attributes for those clips. And you'll continue to see that if you add additional interlaced clips to the project.

But in a from scratch Resolve 17 project, when you have an interlaced clip in the Media Pool, it's automatically in the deinterlacing mode, with the Auto Field mode selected in the Field Dominance setting.

Also be aware that the default deinterlacing quality mode is Normal. This is selected in Project Settings - Image Scaling - Deinterlace quality

Options are Normal, High and DaVinci Neural Engine.

And if you want to use the full temporal resolution, set your timeline accordingly.

Bildschirmfoto 2021-04-06 um 18.22.54.png (172.26 KiB) Viewed 8375 times

And if you want to use the full temporal resolution, set your timeline accordingly.

Bildschirmfoto 2021-04-06 um 18.22.54.png

So if I upload 50i 1080 footage, I have to set timeline frame rate 50 and activate enable interlace processing (it is done automatically when DR17 gets to know a nature of a file) and then in project settings , Image scalling, I have to choose neural engine and that is all?
In clip attributes, it is set Field dominance as Auto - upper first, so I have to leave as it is, isn't it? And above video frame rate it is set on 25, also leave it as it is. My footage is in 50i.
What about in deliver folder? Should I activate frame rendering or rather deactivate it?
Thank you.

Why don't you just try it? When stepping through the timeline you should see any motion advance frame by frame in the same direction.
For output, it all depends on what your client wants.

Why don't you just try it? When stepping through the timeline you should see any motion advance frame by frame in the same direction.
For output, it all depends on what your client wants.

I just wanted to get to know the correct method. I hoped someone has deinterlaced 50i/60i footage by neural engine and could advise how to do it correctly.

Well, it works correctly for me in 17.1.1 with the method described above.

I don't get how I can convert 59i to 25p with deinterlacing. If I check "Enable video field processing" I only can export with 50p or 50i.

That will not work, since the speed doesn't match. You'll need a Teranex or very tedious software conversion for high quality.

The speed conversion works suprisingly well, at least for y purpose. But my problem with Davinci is that it does not do deinterlacing. Please refer to my last post for what my problem actualy is.

You'll have to do it in two steps then: first de-interlace into a good codec and then do the speed change.
For de-interlacing, the timeline needs to be set to a frame rate that fits the speed or doubles the frames (preferred) and click "Enable interlace processing".
You could try to nest the timelines.

Thanks! Unfortuantely it won't work, because if field processing is enabled there is no way to export in less than 50i or 50p. Also it seems a little odd to me why there should not be a way to just convert say 25i (or in my case 29i) to 25p, because that is the point of deinterlacing.

No, the point of de-interlacing is getting rid of interlace artifacts. You have the choice to de-interlace from 25i to 25p, albeit losing half the temporal resolution. But you can't go directly from 29.97i to 25p.

Do you mean by "can't" actually "shouldn't"? Because in Premiere you can and I'm looking for a way to also do it in Davinci, besides the question if that is the best idea.

Try nested timelines, first the de-interlace, then the speed change. Should work.

Lieber Herr Plank, wie schon gesagt funktioniert das leider, weil deinterlacing in der aktuellen Version m.E. nach nur funktioniert, wenn man "enable field rendering" aktiviert. In dem Fall lässt sich aber nur wie schon gesagt 50i oder 50p exportieren, nicht aber 25p wie ich es bräuchte. Übersehe ich etwas?

What about a timeline for nesting set to 25p and frame interpolation at nearest?
If that doesn’t work, render it out first as 50p in a mezzanine codec.
Sorry, but this is an English language forum. Public communication should serve all.
There are some quite competent members in the German forum too.

Just tried a method to deinterlace my non-progessvce upper field first AFTER I finished editing the 29.97 timeline. Problem was my created 29.97 project mistakenly left deinterlace option off. Rather than re create the wheel,look in project setting Image Scaling current project settings, look in "deinterlace quality" box and select Davinci Neural Engine for deinterlacing and now my timeline 29.97 working timeline on can export a render for youtube that deinterlaces during ouput render (but project setting still sees deinterlace as greyed out). In future I'll manually make sure that deinterlace is selected from the get-go.