Colors are wrong when I use CUDA GPU Acceleration, but not when I use the Mercury Software Engine.

[Content Creator 1]

Please see title above. I'm desperate for a solution to this problem.

My colors are wrong when I use CUDA GPU Acceleration, but not when I use the Mercury Software Engine.

Here's what I see in the program monitor when I'm using the Mercury Software Engine. These colors are correct, and accurately reflect what I see in-camera. These colors also accurately reflect what I see when viewing the original video clip outside of Premiere:

...and here's what I see in the program monitor when I'm using CUDA GPU Acceleration:

As you can see, my black levels are completely incorrect, making it impossible for me to color grade with CUDA GPU Acceleration turned on.

Mercury Software Engine simply isn't a reasonable solution for me, so I'd appreciate any assistance I can get with this issue.

Specifications of machine and all other details below:

• Computer

  • OS: Windows 11 Pro

  • CPU: Intel i9-10850k

  • GPU: GTX 3060 Ti

• Software

  • Premiere CC 23.0

    • This problem also used to occur with Premiere CC 22.0 (all version updates).

  • Graphics Driver: NVIDIA Studio Driver 522.30

    • I have also tried using the most recent version of the NVIDIA Game Ready Driver (526.47) and several earlier versions.

• Footage

  • The sample shot above was captured with the Canon R6 using the IPB Light Codec in 4K at 23.976 FPS.

  • I can confirm the footage format is not the problem, as I experience this even with the proxy files I generate.

Please help me resolve this before I lose my sanity!

[R Neil Haugen]

Have you set either your camera, your monitor's settings or the Nvidia control panel settings to assume all Rec.709 is full range rather than limited? Which is wrong, but so confusing a lot of people do.

And the IPB Light is the file compression setting, not the codec. Are you using a C-log form? That would be useful data.

As ... all Rec.709 video is set by standards to be encoded to 'limited' range code values, unless it's the full RGB 4:4:4:4 12 bit stuff. Which is not a common camera setup. So the vast majority of cameras record their Rec.709 as YUV (technically Y/Cb-Cr) files.

But there are a few cameras that allow users to set 'full' range on shooting Rec.709 even though they only produce YUV media. Which is simply wrong. It doesn't give you one iota more dynamic range, as that only controls how the data is encoded to the file, not the range of date recorded.

In a properly setup system, YUV Rec.709 media is displayed at 0-255 even though encoded 16-235. And RGB media is also displayed at 0-255 even though encoded as 0-255. So it works perfectly as long as the standards are followed all the way through from camera to monitor.

Next ... Premiere is set to follow the standards rather tightly. NO camera has an accurate screen, not even the Red, Arri, & Sony rigs above $70,000. On-set, they'll have an expensive and hignly calibrated monitor to check image values, not the camera screen. So do not rely on your camera's screen image as "correct" for anything.

Which is why most users and ALL Mac users should set the preferences option for Display Color Management to 'on'. And well ... both calibrate and profile your monitors, but it seems rare enough anyone calibrates the monitor these days.

Neil

[Content Creator 1]

Hi Neil,

Thank you for your response.

I appreciate all of your comments regarding the project settings and the footage itself, but this is definitely not the cause of my problem.

I took the exact same project file and footage, loaded it on my laptop using CUDA GPU Acceleration, and even connected that laptop to the same computer monitor. When I do this, the issue completely disappears.

This leads me to believe the problem is computer-specific, but I have no idea what could be causing it.

I did try your suggestion of using the NVIDIA Control Panel to adjust the color range from 16-235 to 0-255, with no effect.

In other words, I'm at a loss here!

[R Neil Haugen]

The Nvidia should be set for 16-235 ... and that's the whole weird thing. There's a solid historical reason, but that hasn't been needed for what, 15 years now? Whatever. It works if set right.

But on yours, being as you're getting differences between laptop and that desktop ... I'm still trying to puzzle that out. As it's when that GPU is involved you get a difference. Which ... is odd.

Neil

[Eetu26586710vgcb]

Has there been any solution to this issue?

I just found about this myself and I had been wondering for months that why my exports mess up my color grade but turns out that this cuda GPU setting was the reason all time long.

So do you know if there is any work around to keep the GPU acceleration on in a way that it does not affect the preview window color?

[R Neil Haugen]

If your black levels are off, as with the original post, that is normally due to a mis-setting of the full/legal range stuff in the Nvidia panel or the monitor itself.

Other than that, which GPU are you using, and what driver version? I do hope it's the Studio driver ... the game-ready drivers do not normally play well with NLEs.

Neil

[Eetu26586710vgcb]

I dont think it is about the black levels only since the overall saturadion and contrast are completely off.
I am using rtx 2070 super, and I just tried updating my drivers to the latest studio drivers. It did not help or solve the issue. My current driver version is 528.49 released on 02/08/2023.

[Content Creator 1]

I've tried absolutely everything you can imagine. Wasted days of my life trying to fix this problem. Adjusted every single setting, including black level settings. No solution, and nobody at Adobe seems to care.

[Eetu26586710vgcb]

Yeah I can see that this is very frustrating since for example lumetri color works much more slower than with the GPU acceleration turned on.

[R Neil Haugen]

I've never had an issue like this. I've worked with a ton of users over the years, the vast majority of which have never had this issue. So it is something on your machine that is fixable if we know enough details.

First thing ... for most users, the Preferences option for Display Color Management should be checked. I don't for SDR/Rec.709 work, because my system is heavily calibrated and then profiled to check the calibration. Most don't ... use that setting!

Next, do some work on a clip, export ... with "re-import option checked. Drag the clip to the end of the sequence you exported it from.

If the two match, but viewed outside Pr the image is different, the issue is OUTSIDE Premiere on your computer. And we can then start troubleshooting that.

Neil

[Eetu26586710vgcb]

The issue is definetly caused by premiere or bug related to premiere and nvidia/gpu. I have 4k 10 bit monitor with 100% rec709, srgb, adobe rgb and 98% p3 color accuracy. Monitor is also calibrated to 160 nits, D6500, srgb 2.2 gamma. Everything in my project and export settings are set to rec709 with display color management cheked on.

Changing the cuda GPU acceleration setting to software only is currently the only solution to the problem. After grading in software only mode the export looks exactly like it did in premiere. The export also looks like the same for example in VLC media player and youtube. 

I can make a seperate thread about this issue if that is necessary and I bother to do so. 

[R Neil Haugen]

If you please, yes, a new thread for specificity would be great.

And full specs & data, including what you're viewing in, settings, and of course some screen grabs drag/dropped directly into the text reply box, NOT the "attach files" area.

Neil

[Ty Delgaty]

I am having the same issue on my end. Recently upgraded to the 4080ti, but same on the 1660 Super before upgrading. Very frustrating. I use Resolve and Media Composer as well, and I am only experiencing this in Premiere.

[Content Creator 1]

Yep, it's a disgrace, and nobody at Adobe actually cares. Still having this problem almost a year later.

[basil1891]

@Eetu26586710vgcb  You probably should start a separate thread for your issue. Pls, include all details about the media (source, resolution, codec, etc). Also sequence and project settings, and exactly what and when goes wrong.

[basil1891]

@Content Creator 1  Do you have only one display? Since your systen also has iGPU, what is the connection scheme? Is it connected to the dGPU(3060) or to iGPU port?