Participant

Question

Random colour artifacts/ black blocks being introduced when colour grading.

Forum|Forum|8 years ago
January 4, 2018
5 replies
7555 views

We are having a major issue since the upgrade to pp2018, random artifacts appear to be being introduced when we apply any colour adjustments...

This Is appearing entirely random in the timeline during the edit and previewing, and then in different places again randomly when rendered out in the final output.

Again render a second time, and the artifacts are in different places.

Secondary grading appears to introduce more issues, but even primary grading is introducing issues on occasion.

Turn the colour adjustments in the lumetri panel off... they disappear... turn back on again, they reappear randomly.

This has just started since the upgrade. (Ps; urges are now also rubbish, but thats a separate issue.)

We are Mac. This is happening on multiple 27' inch iMac 17 machines, on multiple projects.

If we grade in resolve, we don't have an issue.

Here are some frame grabs of the problem... See top right of frames... whilst this appears to be the dominant location, they can also appear left hand side.. footage is 1080p 25fps

If we can't solve this, We are gonna have to dump premier.

This topic has been closed for replies.

ToSt

Known Participant

Hi everybody,

I have the same problem on Windows10. After Updating Win (from 8 to 10) an PPro (to newest version) I have a pixeled screen when applying lumetri engine. Only switsching to "Mercury Playback Engine Software Only" solves the issue. None of the others here listed helps. Is this problem already known?

Thanks for replying.

Bests, Tobias

R Neil Haugen

Legend

Tobias,

We'd need your OS/CPU/GPU and the driver used by that GPU to tell. Something like this is nearly always an older GPU or a bad GPU driver.

Neil

Everyone's mileage always varies ...

Kevin J. Monahan Jr.

Legend

DougM,

Have you tried what Felix suggested? Let us know.

Thanks,
Kevin

Kevin Monahan - Sr. Community and Engagement Strategist – Adobe Pro Video and Audio

A

Anonymous

I'm getting this issue with warp stabilizer being applied on one specific clip, but the black artifacts line up perfectly with the most exposed parts of the clip. SO frustrating. I can't use this clip and stabilize it?

See screenshots: Black Artifacts when applying warp stabilizer

any other ideas apart from the OpenCL vs Metal?!

Premiere 13.1.2 (Build 9)

System:

2017 iMac Pro

3.2 GHz Intel Xeon W

32 GB 2666 MHz DDR4

Radeon Pro Vega 56 8 GB

Ann Bens

Community Expert

Please do not double post

Removed the screenshots as they take a long time to load.

F

FS1234

Participant

I have the exact same problem with the video artefacts appearing when using secondary HSL on my iMac 27" Retina. Not sure if you have the option available or have already tried this but I switched the Renderer - Mercury Playback Engine GPU Acceleration from (Metal) to (OpenCL) under the General Tab in Project Settings and it seemed to remove all of them whilst still leaving the secondary HSL on. Might work for you if it's an option?

iamprisonmike

Participant

Made an account just to say thank you Felix, that worked for me finally.

caroline_edits

Community Manager

Hi everybody!

First and foremost, I'm so sorry that Lumetri is causing these visualizations on your projects. That's incredibly frustrating. Our engineers are informed of this behavior and are actively working on a solution that will be made available to users as soon as possible.

The problem lies somewhere within the HSL Secondary adjustments, so if you can avoid using those, you should be okay. The new Hue-Sat curves introduced in 13.0 can achieve similar corrections as the HSL panel, so I'd advise users to focus their color-correcting energy there.

Thank you so much for working together to find a temporary solution and allowing us time to improve our software.

-Caroline

Mo Moolla

Legend

Thank you for your feedback Caroline

Would you keep us updated please

Mo

Mike Dziennik

Community Expert

What format is your footage and what sequence settings are you using?

D

dougm36216729Author

Participant

Footage is original h.264 .mov 1080p

Sequence settings are as above at 25fps.

We have changed the sequence and rendered to 422 pro res and same result.

This appears to be directly linked to secondary HSL grading in lumetri.... If we haven't done any secondary grading and the HSL is OFF, we don't appear to have an issue.... turn HSL on, and it does... even if we have done nothing in the secondary adjustments...

We have tried doing Secondary grading as a separate layer, same result.

Noise is random, and changes when and how it appears even as you scroll back and forth through the timeline... there is no correlation between the preview render and the final output... so even if we have a clean frame in the preview, it might get crapped up in the final render.

Grading in resolve and introducing the footage back to output etc, we have no problem.

Mike Dziennik

Community Expert

Try converting a few clips to ProRes or DNXHD before importing to Premiere and putting them on the timeline. Apply some grades with secondaries and see if you get same result. It's not a fix but it will indicate if the issue is related to the decoding of the H.264.

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