Preview Screen Goes Black when I try to add a LUT

[adamf63981192]

I recently updated Premiere Pro recently. I'm editing this video and I added an adjustment layer so I can start doing color, but when I input a LUT, the preview goes black. I even tried adding the LUT to the individual clip itself but it still went black. I can see the sequence thumbnail in the project bin is updated with the LUT, but not the actual preview screen I need to edit with. No matter where I try to input a LUT, the preview screen will just go black.

I'm guessing it's a problem with Lumetri that needs to be fixed. I hope it gets fixed soon because I love using Lumetri for quick color correction and my job requires me to edit a bunch.

[jasontcox]

Have you tried turning off GPU acceleration?

File->Project Settings-> General. Then Select Software Only under Renderer?

Im guessing you might have CUDA acceleration on?

If this fixes it, it's a GPU Acceleration issue. Make sure your graphic card drivers and software are all up to date.

[adamf63981192]

So the problem seemed to resolve it's self. I didn't open premiere for at least a day and when I reopened my project and added a LUT everything was normal. I did tinker around with the GPU settings but nothing seemed to work at the time.

My computer is a 2012 Macbook Pro so I assume it's getting to the end of the line rather quickly.

[R Neil Haugen]

Do check with Jason's info on your machine ... he's spot-on.

Next ... how about giving us some data on your hardware ... OS/CPU/RAM/GPU/vRAM, and for this the driver used by your video card.

Typically this kind of thing is either because your hardware isn't adequate for the needs of Lumetri (it's kinda picky) or because you've got a driver issue going on. If the graphics aren't up to working Lumetri, you'd need to do as Jason says. If it's a driver issue, get that fixed and you should be able to use Mercury Acceleration.

We won't know until you give us the data I've asked for.

Neil

[adamf63981192]

2012 Macbook Pro

2.6 GHz Intel Core i7

16gb

Graphics:

NVIDIA GeForce GT 650M 1024 MB

Intel HD Graphics 4000 1536 MB

However, the issue seemed to resolve itself. I didn't open my project file for a day or so and when I reopened it everything was back to normal.

[Jim_Simon]

I've had this issue.  It was a bad LUT.

[adamf63981192]

I thought about that too but it was applying to all of my LUTs. Including the ones built into Premiere.

[Jim_Simon]

it was applying to all of my LUTs. Including the ones built into Premiere.

I did notice the same behavior, but only after I tried the bad LUT.  Restarting PP solved the issue for the native LUTs, but as soon as I tried that bad one again, it ruined them all and I had to restart.

[R Neil Haugen]

That's a very useful comment, Jim.

Lumetri has some interesting quirks. It takes the entire village to figure some of them out.

I'd prefer fewer ... quirks. We all hope for the best!

Neil

[andyb-compassion]

I've had this problem, and posting my solution here for what it's worth.

I usually copy my LUTs into (show package contents on Premiere application) -> Contents -> Lumetri -> LUTs -> Technical. This way they show up in the Lumetri panel.

3 things I've found:

• if I open a project and have added LUTs to that folder since the last time I opened it, then the LUT I had chosen in the Lumetri panel will likely be wrong, forcing me to go through each clip (or adjustment layer) and re-apply the correct LUT
• if after correcting the LUT it only shows black (as per original post), if I select "none" for LUT and then toggle back to the correct LUT then it will show correctly
• For some reason, if I export a project using Media Encoder it will ignore the LUTs.

But at least I solved my black preview screen problem.

[R Neil Haugen]

That is NOT a good idea, to add your own LUTs/Looks into the application package or "program files". When Lumetri was first added, that worked ok ... but they made a change around the build series that was 2015.3/4 versions, and since then, that can cause all sorts of weird things.

They do now have specific locations that you can add your own LUTs/Looks that will be viewed by the appropriate slot, either in the Basic tab or the Creative tab. Here's the table they have to show where to set a folder in both Macs and Pc's.

Neil

[andyb-compassion]

Thanks! I wasn't aware of that change. I'm on a Mac, latest OS and latest version of Premiere and I do not have any folders under Adobe/Common for LUTs. Should I create them?

[R Neil Haugen]

Yea,you have to create them. Works great.

Neil

[chris_z77-czYu1k]

I faced the same problems you had. Most of the time, re-starting premiere AFTER saving a copy on the new PP version would fix the freaky LUT issue.

As for AME ignoring LUTs, I also faced this problem and had 2 solutions.

1- LUTs must be copied to both Premier's and AME Package folders, that's previously. I believe you will not face this problem following what Neil suggested.

2- in AME turn off "Import Sequences Natively" seemed also to fix the problem.

Hope that helps

[R Neil Haugen]

Correct, MediaEncoder will 'see' the LUTs in those folders of that chart. And for most things, un-checking "Import sequences natively" in Me's preferences is a wiser option. Except for a couple situations, where you need it checked. And at the moment, I forgot what export situation needs "import natively" active. Dang!

Neil

[chris_z77-czYu1k]

I believe it's something related to RED footage and RED sequences