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How to Correct Log & HLG Footage & Make LUTs
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- Опубликовано: 14 авг 2024
- I've received many requests for my opinion on different techniques for grading, correcting, transforming and converting log footage and today we're going to tackle them... LIVE!
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💾 Downloadable Samples: bit.ly/3hfyTwF
📼 Previous Video #1: • How to Color Match Cam...
📼 Previous Video #2: • Common Log Grading Mis...
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Table of Contents:
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0:00 - Intro & Backstory
5:55 - Test Samples & Exposure
9:05 - What about Raw?
9:56 - Different Methods of Applying Contrast
17:58 - Acquiring & Applying Official LUTs
21:02 - Using LUTCalc
28:23 - LUTs vs Color Space Transforms
37:05 - When I Finally Move My PiP ;P
40:30 - A Few Notes on ACES
47:29 - Mixing Transforms & LUTs
56:03 - Over & Under Exposure
1:06:54 - HLG
1:26:44 - Raw Decoding Example
1:34:03 - Comparing DSC Labs Charts to X-Rite
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#livestream #colorgrading #log
This man giving out free course for us noobs. We dont deserve him.
you prolly dont care at all but does anybody know a method to log back into an Instagram account..?
I stupidly forgot the password. I appreciate any help you can give me.
I use 3d lut creator and I thought i had it all figured out but your video made me realize that there are many different ways to do this properly. You showed us here that its not only the tools but understanding the concept behind it is the most important thing. Thank you for making this live tutorial.
HLG Tutorial starts at 1:07:02
hover your mouse on the wheels (lift, gamma, gain or log) and use the scroll on your mouse to increase or decrease the values. That way the values don't jump.
German here! Your "Arri" pronounciation was pretty decent! Thank you so much for all your videos, helps in so many ways.
This right here is the class I've never found on skill share. Heck, this is the class I would love to had when I was in college.
I do have a pretty good understanding of Resolve, video, and color, professionnally, and I watched the whole video, and everything is very well put and quite brillant actually since it’s very very hard to vulgarize such concepts and workflows. It’s very cool that you managed to put all that in a 1.5 hour video, it’s dense but always interesting and very precise (which I love). Very well done, thanks a lot ! I hope you can keep doing videos like this with that level of knowledge.
Since watching the last video, I've scoured the web for other types of charts like the ChromaDuMonde (CDM) Color Chart. I know after buying (and losing) larger McBeth charts from my stills days, the technology is worth it - hues, contrast, numeric color accuracy for shooting color critical work. I just feel like for the average user, there has to be a cheaper chart - especially when we're customizing the general shape of the X for grayscale. At the end of the day, I can qualify in resolve and change any shifted hue. I just want EVEN pleasing skin tones for my sony cameras. I watch all of your color vids and love nerding out on color science with you.!
I agree, the CDM charts are super expensive.
XRite Colorchecker video is adequate. You don't need an X, just a grayscale ramp is usable.
Really, though, if all you want is good skin tones from Sony, shoot Cine 2 on 8 bit cams and purchase the Leeming LUT for excellent, accurate color. It's what I use to save time.
2:13 “You wanna work on your exhaust pipe out there buddy?”
This was such perfect timing because a Corvette on the side of the road had just blasted away right by me. 😂 I was cracking up.
Thanks for this. This cleared up a lot of stuff I had mixed up in my head about. And I appreciate the charts for helping me confirm how the settings actually work.
So this just popped into my head just now: Most of us don't have the X pattern color/contrast card, we might have a simple color checker that still has white-to-black chips going in one direction. This is also perfectly fine to work with, but what if, during your shot, you just physically flip the card 180 under the same lighting conditions. Then in post you cut, crop and stitch it so they are touching one above the other. You'll get that X pattern :)
Gerald, thank you so much for this tutorial/course, you did changed my view on exposure ! I was more inclined to do ETTR, thinking I would "maximise" Dynamic Range but now I will expose for 41% middle gray and add between 1 and 2 stops depending on the scene. Again, a big thank you !
0:30 "banana" -Gerald Undone 2020
Now this will help a lot with our HLG workflow. Thank you for such detailed explanation.
Look forward to your videos Gerald, you make learning entertaining and enjoyable, a rare talent indeed, Jay from South Africa
Gerald, thanks so much, when you show the tools you use and how you use them, I imitate them. Learning from you has made my videos so much more better. I really appreciate the technical aspects of this tutorial as well! I learn so much. I dont like resolve, except for colorinf. I edit in premiere pro, but I used the technique you showed in this video to export the color lut out of resolve and then I used it in premiere pro. It looks amazing, thanks! Keep up the great work 👍 👏
Hey Gerald, I couldn't catch this live so watched the replay. Learned so much from today's video. I am currently using a Cine 2 profile as I find that my workflow was the easiest as I had a short learning curve on it. This is the first time I understood Log so well so I am going to experiment a little and see how I change my workflow in Premiere to suit that. Thank you so much for this detailed video.
I'm a little late to the part but thanks man! This is hugely useful.
Thanks for all your hard work publishing super helpful technical content!
First off, I'd just like to say you cleared up stuff I didn't even know I didn't know yet. Thank you for your style of content, it is so helpful.
I don't know if it would work like I'm thinking but if it does, I wish DSC labs would sell digital versions of their charts shot with specific cameras just for making luts. Like say take each camera manufacturer and then shoot the chart with well lit 5600K light and use all the different profiles and codecs, and then we could take that tiff for our camera and use it to help build our own custom luts with. Otherwise throwing down almost 900 bucks for that chart doesn't work into the budget. I would love to have it for just one day though. Maybe something to try to rent.
You can used published shots by Gerald or in the Leeming LUT Facebook group as a reference for how the cheaper XRite Colorchecker should look post correction. No need for camera specific shots.
dude we need more people like U in the Universe ! , love how you dedicated time on that !! awesome dude
This is soooo helpful and not for granted! Thank so much for your gifts to us, wishing you health and wealth:)
This was absolutely amazing and helpful for trying to work with shooting hlg for a first time camera user. Thanks!
Great explaination as always. Would love for you to expand on the workflow bit and where in the flow to actually use luts as against corrections. Remember seeing an Avery Peck video that explained it well, but that was a while back. Would be great to see an updated workflow using real world footage rather than color charts. Have almost had way too much of these color charts now.
Awesome job, Gerald.
Thanks
Gerald, you’ve done great with this one. Keep doing what you do. 👍🏻
Thank you very much Gerald
I switched from Premiere Pro (+ AE, Audition,...) to Resolve Studio a couple of months ago - no way will I ever go back!
Hey Gerald, SO thankful for this. You are always more help than you know. I did have a question regarding HLG(3) though. I often shoot HLG3 and ETTR. Usually, I'll use BT2020, then a Leeming Technical LUT to bring the image back into 709. My issue is, it's not often I can ETTR as much as the Leeming LUT would like. I usually slap it on, then make exposure changes to accommodate. However, I was so excited discovering LUTCalc, in hopes that I could create my own HLG3 to rec709 conversion LUTs for different exposures of HLG3. Issue I have is, for the record gamma, there is not an option for HLG3 (whereas for the output gamma, HLG3 is available), there is only an option for Rec2100 HLG, and Rec2020 for the gamut (as opposed to BT2020). I'm sure it's safe to say that this wouldn't work for me? Again, keep doing what you do, this content is priceless.
Thanks so much, learned a ton from this stream replay!!!
Extremely well explained video. Thanks for your time and effort Gerald!
I'm in love with these videos, they feel like the film school I will never attend.
Gerald, you are a star! No sponsorship - Gerald Unbung.
Color space transform is the bomb on Resolve. Makes it so much easier! Disagree strongly with putting on a lut straight on log footage. Very good video. Would like to see a video on Resolve on workflow. Casey Farris and a few others have made vids of the importance of node order. And for my gopro footage, would like Black Magic put in some profiles for it. So far some success using BMPCC profiles in resolve. Gets me 90% of the way there to rec709. Keep it up! Very informative! And saw you had the leeming luts there, yes bought them also. But nothing beats a manual grade. Then again don't have a proper monitor. Not even HDR! Keep them coming!
Lex sent me
Thanks for putting this out for free. I really appreciate it!
You are a gift my friend, thank you so much for all the help you have given! :-)
Dude. You’re amazing! Seriously. Have you considered possibly creating and selling courses online for stuff like this?
3D Cube LUTs technically speaking can take in an input from 0-1 for each color channel, but the outputs are not constrained to the 0-1 range and you can have outputs greater than 1.
The main ways to lose information with a LUT is if the maker clipped the outputs, or if you feed in values that don't fall in the 0-1 range. Might be worth making a deep dive into LUTs video.
Great video! I always feel bad when you spend your time on long form content like this and the chat is mostly people criticizing the facts you are sharing haha.
Great video, so helpful! It’s a really hard job, to put yourself out in a livestream and mantain quality content in an efficient manner for almost two hours. Hope you did catch that fly! =D
lex sent me lol
Thank you! I'd personally like more advanced lessons on DR🎨😬
Check out Waqas Qazi
@@MaxRovensky ouu nonononono, he is the guy who makes the mistakes Gerald talked about in the beginning. He grades Log just by using contrast and saturation. I can't watch him any more.
Agovyn EDT uh, no 🤔
He mostly uses primaries and log wheels
Also his stuff is more about advanced creative grading than just gamma correction, there isn't "the one and only true workflow" for that
@Agrlvyn oh no please do yourself a favor and just don’t. You can learn very few things from Qazi only if you’re aware of the misleading info he’s putting out.
The guy is doing so so many things just wrong. It’s bad practice that will catchup with you later. Learning the fundamentals correctly is best.
Just wait until Gerald touches on this.
Xsst different content for different purpose. There's no "wrong way" to color grade so long as you achieve the desired result
If I need a scientifically perfect rec709 look, I'll go with Gerald
If I need a highly specific creative look, I'll go with Qazi
Love this topic and thanks Using LUTCalc is nice
Hey Gerold, have you considered making a Resolve tutorial for beginners? maybe a 3-part series? Im just saying. I know there are some other folks doing it but they all, bar none, skip steps because they assume too much of their audience. Not everyone who knows, can teach. You tend to be more thorough in your presentations.
I am sorry that I missed this LIVE presentation.
It's better to modify the Auto curve w/ 8-bit if you want better colors than to mess with 8-bit LOG unless you are changing the look somehow to something psychedelic related to all the scenes.
Speechless ... and mind blown ... but I think I will be okay. Thank you! :)
You rock. Thanks Gerald!
Phone notification goes off during shoot.. 'That's a carton'. 🤣
Great video! For using a lut, do you have to correct white balance before applying one? How do you even do that?
An idea for a future video:
difference between using the lut created from colorspace transform vs colorspace transform.
Do you use rec709 LUT on your monitor when you're shooting the video? how do you judge the 32 mid grey with or without LUT on when you're exposing the LOG. Also can you make a video for when you shoot this process? Thanks.
Hi Gerald Thank you so much for your awesome videos I am wondering if you have any so I can match my different cameras for life broadcasting I’m also shooting on green screen keep up the great work thank you so much
lex sent us here
Thanks this was a lot of good information !
Say "I'm Gerald undone, and my ISO is over 9,000"
Thanks!!!! So helpful.
GERALD UNDONE!! Where can I find native Sony LUTs for A73?
On the World Wide Web somewhere I assume...
Or there’s this website
sonycine.com/resources/luts/
Great videos! I am so nee to this. ActuLly just got Sony A7Siii , can you post link to how to use passport criteria chart to correct grade of slog3? 41%referenced in this video. Thanks!
Hi Gerald! First of all thank you so much for this video, it's awesome and it helped me a lot with my new FX3! I have some questions for you since I am struggling with monitoring the FX3 with the Ninja V, and I feel I am not working correctly with the zebras, especially with whites.
General main question: how do you monitor Slog3 - SGamut3 Cine with Ninja V, in order to see something close to what it will be after post-production (considering also 1.66 over exposure)?
More in detail:
1) The LUTs you provided are meant to monitor the video with Ninja V during shooting or just to be used in DaVinci post-production? Do they consider the 1.66 over exposure for S-Log3?
2) I noticed that FX3 zebras and Ninja V zebras doesn't match (!!). It's just me? The ETTR exposure in my case is correct at 95% zebras on Ninja V (monitoring with your LUT I see a nice exposure), but at the same time zebras don't appear on FX3. To see zebras on FX3 I need to go down to around 70%, so Ninja zebras 95% = FX3 zebras 70%. And, if I push ISO to make 94% zebras appear on the FX3, the image is totally clipped on the Ninja V. And I would add, by eye you can see it's totally clipped also on the FX3. So what should I trust, FX3 zebras or Ninja V zebras? If it's the first, how to monitor something that appears totally clipped on the Ninja V?
What am I doing wrong? Getting crazy here! I read also that Ninja V has problems with Slog 3 and that you need to use just PQ mode to monitor. Is that true? Thank you Gerald and everybody who can help me! 🙏 (Ninja V has the latest firmare 10.83.00 installed)
I would like to create a monitor LUT for the GH5S.
Aren't the color dots on the vectorscope supposed to fall into the boxes once the footage is corrected? Or are the chips calibrated for 50% saturation? Or something else?
late to the party on this crazy informative video. I shot something recently at 800iso on a EOS R and I'm trying to make the shadows darker, looks great in davinci but the shadows turn into a blocky mess on RUclips and is boarder line unwatchable. have you ever discussed this? I've been trying a few things with no luck, not sure if it comes from noise because I shot at 800iso or what.
how can you do this when shooting underwater videos?
Nice one, learnt heaps, I film in HLG so came up with some new tweaks to my workflow after watching your flows :D
Is there something you could share with is on colour correcting relating to monitors, calibrated and uncalibrated, different gammas, IPS/VA etc, that would be handy to come up with some workflows for grading on a particular monitor for youtube etc instead of having super saturated or contrast under/over etc? :)
So well.... Is there any reason to use slog in controlled enviroment like your studio? I got it when we record outside with a harsh sun or smth like that. But in the studio I guess we don't need tthat much of a dynamic range
Much love from lex❤️
It would be great if you could show us how to grade HLG footage from the Sony Xperia 1 II from a Premiere Pro point of view... (I do have footage available for that if you don't have any)
I'm coming from shooting .mov on a Canon 5D4 to an A7S3 with all of these different video options. I'm trying to keep up with everything your saying but soooo much of it just goes straight over my head. Is there anyway you could do a basic/intro session to all of these new settings and options to someone who is very new to it all GU? I'm guessing a lot of Canon users are moving to Sony right about now so perhaps there's high demand for this kind of video. Seems like there are an overwhelming amount of combinations etc. I'm just so confused! HLG REC 709 CINE2 Gamut SLOG3 BT2020 Ahhhh!!!! Thank you though!!! :)
Love you GERALDO!!!
why in 26:29 the waveform is like that? is it RGB colorized?
Thanks for this man! Forgive me if you’ve answered this before, but if I want to ETTR “perfectly” using a gray card, what percentage should I set my zebra to (for S-Log 3, Cine3)? And assuming there aren’t any wild highlight incidences, would you recommend +1.3 or 1.7? Cheers!
How did I miss this??!! 🙏🏼
Hi Gerald, I am a great fan of your channel. Just a quesion on this tutorial: Is Aces color Space not a good option for de-logging Log-Footage in your mind, especially for more professional cams?
I came across Aces incidently, and I am more than happy with it because the process is so fast. I even found a very nice IDT for my iPhone 8 footage shot with the Log profile in filmic Pro (it's the IDT called P3-DCI (60 sim)). And for my S1H I use the official Panasonic IDT, the Panasonic P35.
I am Gerald Undone and when I want to focus, I always get eye af.
Nice. Great word play but it won't sound the same if he reads it out loud. Genius though.
Good job sir.
Yo man could you please do another new comparison on the Panasonic S1 now that all the new lenses have been out? Comparing it to other cameras in the similar price point
"...it should show my stupid face over there in Resolve. Hi" Oh Gerald, you know how to make us laugh
Lex sent us he said he likes you
Hey so with the updates to the moza slidepod and gimbals with app integration now do you like the combo more than when you originally reviewed it?
Lex gang 😅
I come from lex
As a Canadian can I save money by buying camera gear from the States?
It seems like the Slog 3 color transform in davinci is making my skin tones very hot for some reason, and when I try to pull them back they get muddy. I've just gotten the a7siii and I exposed at 0 stops and I'm curious what you think may be causing this. Thank you for everything!
What camera settings you had?
Thanks
Can we get an update on the alleged fake R5 overheating issue?
To color RAW video, is it needed to apply any LUTS (as happen for LOG) for changing the color space in the right way or not?
No. Above the color wheels, where it ssys "Color Wheels", theres a camera icon. It automates the process of applying log correction to raw. Although there's one brand of pro cameras, which raw format has no info on the log settings, at filming. I just dont remember which brand.
Darren Mostyn has a video about this. He's a pro colorist, with +25 years experience.
It would be great to have dealt with ACES.
In your last video I asked for a sample clip for us to download. Next video we get a downloadable clip 👍
where can i buy that atem mini ? I cant find it in amazon india.
Alright, lets color!
@Gerald for gh5 vlog, how do I know what to expose for the 18% grey ? Im using a Xrite passport. Is there a chart or something that explains it ?
Usually the manufacturer provides a white paper with the specs for their log curve. When in doubt, a safe number is usually between 35-40%. So if you want a little over-exposure, you can aim a bit higher around 45%.
I think for V-LogL, it might be 42%.
Lex sent us 💓
Please make this video for Premiere Pro. Thanks.
Anyone else from Lex?
whats your opinion on FilmConvert?
He's gonna get far...
Yo what mic????
whos here from lex
Me
Moi
👀
@@RealLex hi lex