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Input Lut (under interpret footage menu) not having an effect unless I switch to software encoding

Engaged ,
Mar 02, 2022 Mar 02, 2022

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I love the new input lut feature of premiere 22 meaning you can apply a lut to a batch of clips in your source window whilst scrubbing through them. It works a treat on my M1 macbook pro but doesn't work on my pc (I have an RTX2070, 64gb ram, Ryzen 5950x) unless I turn murcury playback off and switch to software only rendering.

 

Anyone got any ideas?

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Editing , Error or problem , Hardware or GPU , Performance

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Community Expert ,
Mar 03, 2022 Mar 03, 2022

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Update your GPU drivers, and close any other programs using the GPU, this can include web browsers.

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Engaged ,
Mar 04, 2022 Mar 04, 2022

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I tried this straight away but it did nothing

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LEGEND ,
Mar 04, 2022 Mar 04, 2022

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Now delete your cache files with the project closed, and relaunch Premiere. That might get it working.

 

Neil

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Engaged ,
Mar 07, 2022 Mar 07, 2022

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I just did this and it made no difference.

 

again, when I switch to software only (instead of CUDA) the LUT appears. 

 

Do you think this could be a faulty GPU or a setting in the nvidia software maybe?

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LEGEND ,
Mar 07, 2022 Mar 07, 2022

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So you can select an Input LUT on Software only (for Mercury Acceleration) ... but you can't with the Cuda option set ... is that it? Or are you able to select a LUT, but see no effect for doing so?

 

And you've tried the newer Studio drivers for that GPU also ...

 

Neil

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Engaged ,
Mar 07, 2022 Mar 07, 2022

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this one "Or are you able to select a LUT, but see no effect for doing so?"

 

When I installed premiere 21 to try, the input lut option was greyed out and not selectable at all but in premiere 22 the lut can be applied, however you can not see the effect of it in the source window.

 

If I add lumetri colour effect to clips on the timeline and then select the same lut, then you can see the effect fine, but in the interpret footage, input lut option, there is no visible effect until I switch off CUDA acceleration and switch to software only. Then can see the lut take effect.

 

I have updated geforce drivers to the latest one, however I am now considering rolling this back to see if it makes a difference. to confirm, I didn't really use premiere for a couple of months so cant confirm whether or not this issue started when I updated GPU drivers or not.

 

Adobe have suggested a full preferences reset and clean install which I will try when I finish my current project.

 

At first Adobe tried to tell me the clip I was using was incompatble with this feature, however when i explained that the same clip behaved as it should on my macbook with the same lut then they accepted they were wrong on that one...

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LEGEND ,
Mar 07, 2022 Mar 07, 2022

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Thank you, that was a very helpful response!

 

My next question is to ask what is the media you're using there?

 

Trying earlier drivers can be useful also, as for a while late last fall, there were some Nvidia studio drivers that were not working well on some systems. I had upgraded drivers, and had to roll back to get things working properly. But supposedly those drivers have been replaced.

 

Well ... "trust but verify" is still the wisest aphorism for professional sanity I know.

 

Neil

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Engaged ,
Mar 11, 2022 Mar 11, 2022

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Gpu rollback did nothing. Nor did a full clean and install. 

 

Adobe have confirmed my gpu is working as it should. 

 

It seems there's no solution. Maybe a new £7k mac studio is the only solution 🤐

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Participant ,
Jul 22, 2024 Jul 22, 2024

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Two years later... Has anybody actually seen this work? It doesn't even seem to save the setting.

Modify >> Color >> Select a custom input lut >> OK....

 

Nothing changes. Go back to the same page and input lut says "None"

 

Huh? And yea I know I can apply an lumetri effect/lut to a gazzillion master clips but that's also a junkshow: 

 

https://community.adobe.com/t5/premiere-pro-discussions/how-to-remove-master-clip-effects-on-hundred...

https://creativecow.net/forums/thread/batch-removing-effects-applied-to-master-clips/

 

 

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LEGEND ,
Jul 22, 2024 Jul 22, 2024

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There are several million daily users of Premiere. I would hazard a guess that among those, several thousand users work with LUTs on a daily basis. Without troubles, for the most part.

 

First question, where did you get or make the LUT? Premiere needs specific types of LUTs to work with.

 

Second, where did you store the LUT on the computer? Yes, that can be crucial here. And there are wrong places.

 

Third, how are you applying this? Modify/Intepret Footage dialog, the Lumetri Settings panel (the one NAMED Settings with all the CM options in it), or just the Lumetri Basic tab's Input LUT slot?

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Participant ,
Jul 22, 2024 Jul 22, 2024

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Thanks Neil -

It's a .cube lut directly from Arri that works perfectly when I apply it through other means within premiere - ie a lumetri effect which I think is what most of those millions of people are doing. But applying that to a bunch of master clips has it it's own complications I'd like to avoid (see those links).

 

I'm just right clicking a source clip, Modify > Color. I select that file as an input lut. It does nothing and does not appear to keep that setting at all (when I go back to Modify > Color it's not there). Basically what the OP is saying except that in this case I am on a Mac.

 

I get the same results trying the other method (Lumetri settings page, Source Clip Input LUT)

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LEGEND ,
Jul 22, 2024 Jul 22, 2024

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That's intriguing, as it should apply to the clip when loaded that way. Huh. So again, where are you parking the LUT on the computer?

 

For general information, the Source clip is what used to be called Master clip. Just a name change.

 

And as someone who works for/with/teaches pro colorists, and works in both Premiere and Resolve daily ... Source clip workflows are your biggest best friend for color consistency and speed in Premiere. Bulk applications of color presets and settings is both a great help for consistency of steps. And the fastest way to get things done.

 

So if you have problems with it, please post, and I can probably help you get past them.

 

There are some hinky things in how it all works, of course. Such as ... select a bunch of clips in a bin, go to the Lumetri Settings tab, and the Source clip section. Which should apply only to the Source clips, not to anything on a sequence, as you've not selected that, right?

 

But ... gee whillikers ... it not only applies an Input LUT to the clips selected in the bin, but also, to the current clip under the playhead in the Timeline panel ... even without any clip selected, and "selict clip under playhead" turned off. NOT what we expect or need.

 

So you do need to apply LUTs or presets to selected clips in the bin using either drag/drop from the Effects panel for presets, or Modify/Color for Input LUT use.

 

For your situation, I typically prefer suggesting presets. For a simple reason.

 

All LUTs are built for a specific combination of scene contrast, lighting contrast, lighting color, camera color balance ... and etc, so any LUT acquired or made needs a specific clip for optimal working output.

 

Colorists normally apply LUTs to a node such that they can 'trim' the clip through the LUT, with corrections applied prior to the LUT. Frequently putting the LUT in the second node, using the first to trim the clip. However, Resolve's design is solid for simply applying a LUT and trimming in the same node, as the LUT is always processed after other color controls in that same node are processed.

 

The equivalent in Premiere is applying the LUT in the Creative tab's Look slot, then using the Basic tab's exposure/contrast/sat controls to trim the clip in.

 

So ... I recommend creating a Lumetri preset for each camera/scene type, with the normalization LUT in the Creative tab slot, and maybe even Curves adjustments for additional hue control per camera. Then selecting the appropriate clips in the bin, you just drag/drop the correct preset onto them ... and all are normalized bingo.

 

And if/as needed, you can go to the Source tab in any sequence, and trim the Basic tab of Lumetri to trim the clip to the LUT.

 

Or ... for many things ... if you have log encoded media, and the app recognizes 'your' log format, using auto detect log and auto tonemapping to do the normalization via algorithmic transform rather than a LUT.

 

Why?

 

Algorthmic transforms are vastly more complex than a LUT, and therefore are totally safe for your pixels (which no LUT is in fact). Do they look a bit different than the maker's LUT? Of course.

 

But as you are apparently using Arri, you may note ... Arri supplies a ton of LUTs for normalizing. And you can choose from them as needed. There is no "perfect" normalization, either LUT or algorithm, for any camera for all settings and user needs. There are only options, chosen depending on your actual clips and aesthetic feel in the workflow.

 

Most of the colorists I know and work with, will test a manufacturer's LUTs out, to see what each does in the socpes. Then they roll several of their own for actual use.

 

And a final comment, that ... as neither any normalization LUT nor algorithm is expected to be the actual end result ... they're all a start for the process. All equally valid when used consistently.

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Participant ,
Jul 22, 2024 Jul 22, 2024

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Thank you for the detailed response! See my last post for what I ended up doing to get it working (you can also see it NOT working in the screencap).

 

We are using the lut as intended - as a quick way just to let loggers, editors (and producers!) poke around the project and see roughly what the footage is supposed to look like as we build sequences. So the ability to strip them clean in a few clicks down the road is critical.

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LEGEND ,
Jul 22, 2024 Jul 22, 2024

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For your use, then, what you're doing is simply what you can do at this time.

 

Temp use is naturally required in a lot of shops and teams. And there are some things in Premiere, that one just doesn't understand, that seem to have been left out.

 

Like ... you can disable all source effects to a group of clips, but you can't disable selected source effects as a group thing.

 

And you can't enable all source effects as a group thing ... which is bizarre.

 

So in your case, using the Modify/Color option is all you've got. You can't batch remove presets.

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Participant ,
Jul 22, 2024 Jul 22, 2024

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Finally... Here's a workaround that got "Input LUT" going for me:

 

I had to select Override Media color space then just pick a colorspace in the dropdown (709, the same as the media colorspace was fine) AND select the input LUT. Attached a screengrab of it not working then working.

 

Whenever I just left "Use Media Color Space" selected it would not apply the input LUT.

 

I can then apply in bulk and remove in bulk as long as the colorspace option and dropdown are selected, which is what I was after. Too bad it took an afternoon to figure that out. Takes like 2 seconds in Resolve.

 

Heads up that it premiere failed to do this consistently across multiple bins even though it looked initially like it did work, so you might be stuck doing it a bin at a time. Search bin might help here. Either way it's still better than a clip at a time. Hopefully someone finds this helpful!

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