FIX YOUR GAMMA SHIFT explained by a Colorist
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- Опубликовано: 23 июл 2024
- Bonjour everyone !!
Throughout my career, I pulled my hair several times for this gamma shift happening on my Apple machines. After searching over and over, asking my fellow colorist friends, making mistakes with the clients, I found A SOLUTION TO THE PROBLEM.
Hope you'll enjoy the video !
Compensation lut : shorturl.at/jnPQ9
Todd Dominey video : • Why Are QuickTime Vide...
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Time code:
0:00 Intro
2:10 Let's watch the gamma shift
5:24 How to fix the gamma shift ?
8:39 How to fix the gamma shift on the iMac ?
11:14 Recap 
Кино
Hey Frenchie, my name is Cameron Brown, I am also a Colorist, and the moment I read the name of this video, I immediately wanted to reach out and let you know when you are setting up your Color Management in Davinci Resolve being that you are grading on a Mac or some form of Apple computer you can just leave your ODT set for Davinci Wide Gamut, Davinci Intermediate to Rec.709A and Rec.709A Gamma. It has came out now that anyone who is on a Mac should be setting the ODT Output for the Rec.709A ColorSpace. Setting your Output ColorSpace is the correct Space for Mac Computers.
Also make sure you set the Tags on the Render page for that 709A. If you feel as if it's off especially when you are running your ProArt Monitor on an I/O device. If you open the Project Settings and jump down to Color Management page. Scroll down to the bottom and above your Tetrahedral setting for LUTS you will see box that says your output Monitor setting, you can set that for Rec.709 Gamma 2.4.
(Turn this Setting Off Before Rendering the Project) I honestly can't remember if that ends up causing visual problems if it's left on.
Thank you for this comment. Dude, you have no idea.....finally uploading accurate colours I SEE on my mac to youtube...
Your LUT saved the day! thanks so much!
I am glad you find it useful !
I usually color my videos in Rec709 gamma 2.4 because that's the standard. For my client preview or online delivery (RUclips) I create a node (CST) in the timeline that converts Rec709 gamma 2.4 to Rec709-A so I can disable and enable it whenever I want
That’s a good one !
exactly what i needed, this is the closest way to match with the color-grading result in davinci resolve (closer than gamma 2.4)! well done & subscriebd!
Glad it helped! ☺️
Very interesting tuto. Thanks Chloe 😊😘💞
Glad it was helpful!
@@frenchiecolorgrading ❤️
Now after that long story I left in the comments haha I wanted to tell you keep up the good work. I did also want to say you got a completely different way of how you set up your Node Tree and what. Regardless it looks great!
Thanks for the Frenchie CG.
Will the LUT work in Vimeo?
Perhaps i'll give it a go and see how it works.
Thanks also for the Todd Dominey link. Very helpful.
Hi Karl ! Yes, if you have a shift on your Davinci interface when you change to rec709-A then use this lut :)
I tried it on vimeo and it is accurate for my previews :)
Thanks for your tips. If I’m on a PC, do I have to worry about this gamma shift if I’m supplying a video to a client that is going to view it on a Mac?
Thank you Frenchie, its very helpful. I find it is alway shift when I put my graded footages into FCPX timeline. Have you ever be in any project that the Editor used FCPX?
I think I never experienced an online export through FCPX.
Your gamma shift makes your image lifted ?
If yes, you can put the compensation lut on your video before the export and test :)
@@frenchiecolorgrading The image is lifted through FCPX with the gamma 2.4 graded footages. I found it works perfectly fine when I use DWG/rec709a graded footages.
if you grade something that is going only for youtube and facebook would you export in rec709-A? to have the correct colors?
If you are the final output before the youtube or facebook posting, I think it would be better for you to work with an output colorspace of Rec709-A.
It will be simpler and you won’t have surprises when it gets online.
i have changed my mac book color profile to Rec709 gamma 2.4! How does that differentiate from Rec709-A??
Super cool ❤❤❤
Hi Frenchie, are you usually delivering in rec709 2.4 even after doing all of your reviews in rec 709-A? Do you deliver rec709-A if you know that the final video will only be displayed on web?
Yes, most of the time I deliver in Gamma 2.4 because my projects need to go in online stage (vfx, clean ups, compositing ..).The online team then handle the final delivery :)
If I am outputting the final product, I am putting my output color space to Rec709-A :)
@@frenchiecolorgrading woww makes so much sense thank you!
What monitor color profile do you have your iMac on?
This méthode does not fonctionne for moi! J'ai toujours un gamma shift mais j'utilise aces CCT, is it trop nul par rapport au davinci wide gamut?^^
As long as you work in a Rec709 2.4 (dark lit) environment with a proper video-out card and a calibrated display, you should not mess with the Rec709-A tag and any conversion Luts. If your color management is correct for your viewing environment, you can check when re-import your render into the same timeline, check with color bars before. If it looks the same, your file is correct. Everything else, like different video players, browsers, streaming services etc. is the wild wild west, you can not control it. Put your file on RUclips, take 4 different viewing devices (mobile, tablet, laptop and a tv) and different browsers and I garuantee you will see 4 different images!
Keep it simple and technical correct for your grading suite. You can not adapt for any screen out there.
Yes, I agree, you should keep a really simple workflow.
My advice only applies to the preview for client.
The issue becomes : if your contrast is off on their monitor then you are not showing an accurate version of what you had on your screen.
For sure you will have a gap between laptop, tv, phones … etc, but the gap is not as big as the gap that happens with the conversion to gamma 1.96. You then have to explain to your client why their image is so lifted if they are watching the youtube/vimeo playback on their mac.
It happened several time to me when I was sending over in gamma2.4 and they have rarely the patience to understand. Since I switched to rec709-A for just preview output, I don’t have these remarks anymore.
@@frenchiecolorgrading I understand, but i would not do that. It can get you in a lot of trouble. Communication is key, clients need to learn that their macbook screen or whatever they use is not color accurate. It can get close, but if they want to see the exact same thing as you do, they need to sit in the same room and look at the same screen as you do. Or they have a color accurate suite and you can work remote with them. Otherwise they have to trust you and your skills as a colorist. The only thing you can do is to ask them what exact setup they use to preview and you organize the same thing for yourself to double check. Even between Macbook screens from the new M-series (M1, M2 Max, M2 Ultra...), the colors and color management is very different.
I know colorists who buy two iPad Pros from the same series. They use one as a preview for themself and send the other one with the exact same settings to the client.
Finally the absolute Truth. Same with AE and PR. Reimport to check is Key.
hi love from india
cutie thanks
use data level (video) that's the one not Auto.