GH5 Paul Leemings New LUT for HLG Footage

T

TheDingo

Veteran
Paul Leeming has added a new LUT for GH5 HLG footage that has a dynamic range that is similar to V-LOG L. I haven't had a chance to play with it yet, but this might be very useful for GH5 owners who have not purchased the V-LOG L upgrade.

Here's Paul's description of it...

The other bonus is that, as of v2.0 firmware for those with the GH5, there has been a new profile made available called Hybrid Log Gamma (HLG), which uses a highlight roll-off very similar to V-LogL to retain more highlight detail. Whilst it is designed for HDR televisions and the Rec2020 colour space, I have re-purposed it with a new HLG LUT to fit into the Rec709 space, while retaining all the dynamic range advantages.
Click to expand...

Leeming LUT ONE
 
Got this email Saturday and excited to play around a bit.

You around here Paul?

First impression is that the LUT gives not just a bit more contrasty of a look but also a bit sharper (is that possible with a LUT?). Comparing back as far as the much older v401, is this LUT sharper, or does the extra contrast and brighter image just create that perception?

All in all looks good and it's nice to see this unified. Thank you for the update Paul! Appreciate the continual support.
 
Any samples before and after out there? I didn't see any on his website. I'm interested for the low bitrate HLG files. They fly straight out of the box on any of the newer GTX10xx series cards.
 
I'm around :D

I was planning to post about it here once I got all three major NLEs properly sorted with how best to treat HLG footage, but I'm happy to respond now since I've already figured out the Premiere Pro workflow (Davinci Resolve works perfectly with my existing installation guide settings).

Here's a couple of full resolution before/after PNG samples (24MB each so it'll take a bit to download):

http://downloads.visceralpsyche.com/v501_samples/GH5_HLG_v501_before_1.61.1.png

http://downloads.visceralpsyche.com/v501_samples/GH5_HLG_v501_after_1.61.2.png

http://downloads.visceralpsyche.com/v501_samples/GH5_HLG_v501_before_1.5.3.png

http://downloads.visceralpsyche.com/v501_samples/GH5_HLG_v501_after_1.5.4.png

And three more quick samples with the LUT already applied:

http://downloads.visceralpsyche.com/v501_samples/GH5_HLG_v501_1.114.1.png

http://downloads.visceralpsyche.com/v501_samples/GH5_HLG_v501_1.75.1.png

http://downloads.visceralpsyche.com/v501_samples/GH5_HLG_v501_1.93.1.png

I do plan to make a nice promo video at some point but I've got a backlog of other non-LUT related work to get through first, so I'll leave some of the users to post more for the time being :D

Regarding perceived sharpness, I think that is due to my process improvements with colour precision and tonal levels, meaning that the image feels more 'together' than previous LUT versions. This was a clean sheet rebuild, so there's a tonne of improvement I was able to make compared to older, iterative versions.

Cheers!

Paul :)
 
buggz said:
Is HLG suitable for "everyday use"?
All situations?
Click to expand...
If you know you are going to shoot with it for a Rec709 output, and have my LUT, then definitely :)

Or if you are aiming directly at Rec2020, then it's useful too, although I haven't built a LUT for that scenario as it's nowhere near widespread enough yet, and I don't own a Rec2020 monitor to accurately judge it.

Cheers,

Paul :)
 
What is your opinion on 8-bit HLG vs 8-bit Vlog?

Wondering for modes such as 4K 60p or VFR modes in 1080p, which do not support 10-bit and thus preclude 10-bit vlog.
 
8 bit V-LogL is a non-starter in my books as there's way too much banding and chroma errors.

8 bit HLG in theory should be pretty good since it uses 5-95% IRE of the full range of 0-100% IRE. There will be slightly more banding than Cine-D but it'd be similar to Slog2 on Sony cameras - you can find banding if pressed but it's nowhere near as prevalent as V-LogL.

The thing about 8 bit HLG is that I've not seen any mode where it can be recorded, meaning you need to fall back to Cine-D again.

Cheers,

Paul :)
 
Is HLG mode available in 6k anamorphic mode?
My GH5 seems to be stuck in 6K anamorphic mode, as I'm really digging my anamorphic rig.
 
Yes, HLG is available with 6K anamorphic mode.
In another note, besides Paul's excellent HLG LUT, you can also use HLG natively with Resolve 14 for Rec 709 delivery:
- In Project Settings, under Color Management, Change to Davinci Color Managed
- Under Color Management select:
-- Rec 2020 HLG ARIB STD-B67 for Input Color Space
-- Rec 2020 HLG ARIB STD-B67 for Timeline Color Space
-- Rec 709 HLG ARIB STD-B67 for Output Color Space
In this way I am getting quite similar results - I haven't compared color accuracy, etc, but in general both look georgeous.
Paul's LUT has the advantage that it can be used when the project is not color managed in this way, so you can mix and match footage
 
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I am not really understanding the parts below:
- Under Color Management select:
-- Rec 2020 HLG ARIB STD-B67 for Input Color Space
-- Rec 2020 HLG ARIB STD-B67 for Timeline Color Space

On my calibrated NEC PA272W monitor this is REALLY way over saturated, especially RED.

Wouldn't this require a Rec 2020 monitor?



Marionathan said:
Yes, HLG is available with 6K anamorphic mode.
In another note, besides Paul's excellent HLG LUT, you can also use HLG natively with Resolve 14 for Rec 709 delivery:
- In Project Settings, under Color Management, Change to Davinci Color Managed
- Under Color Management select:
-- Rec 2020 HLG ARIB STD-B67 for Input Color Space
-- Rec 2020 HLG ARIB STD-B67 for Timeline Color Space
-- Rec 709 HLG ARIB STD-B67 for Output Color Space
In this way I am getting quite similar results - I haven't compared color accuracy, etc, but in general both look georgeous.
Paul's LUT has the advantage that it can be used when the project is not color managed in this way, so you can mix and match footage
Click to expand...
 
The GH5 has a setting under Record Format - MP4 HEVC - that says it supports log gamma. But that you need a tv or monitor to preview it. What record format should I use if shooting HLG on the GH5 editing in Premiere Pro CC?
 
Wow, I got it working now.
Kept working with it, and got the WB, color, etc to work great.
AND, one node edit, super great for rendering out on my humble PC.
Yey me! *8^)

buggz said:
I am not really understanding the parts below:
- Under Color Management select:
-- Rec 2020 HLG ARIB STD-B67 for Input Color Space
-- Rec 2020 HLG ARIB STD-B67 for Timeline Color Space

On my calibrated NEC PA272W monitor this is REALLY way over saturated, especially RED.

Wouldn't this require a Rec 2020 monitor?
Click to expand...
 
I like very much shooting with HLG profile, even when the final delivery is for Rec709. In my opinion it has more subtle, realistic colors and it is FREE! I played with Resolve 14's native HLG support (in color managed workflow, see above), Nick Driftwood's LUT and Paul Leeming's and found that the Driftwood LUT gives exactly the same results as Resolve 14. It might be actually the same LUT, as there are no visual differences at all.
 
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Yeah, Nick himself said to me that it's just a transform LUT to go from Rec2020 to Rec709. It's a mathematical LUT, hence it being the same as Resolve's.

What mine is designed for is proper Rec709 colorimetry and accuracy.

The problem with Panasonic has always been that their colorimetry isn't Rec709 accurate out the box. That's no different with their HLG LUT. So even if you were to remain in Rec2020 space, you'd still need to correct the HLG profile colorimetry to be accurate.

Currently I don't have a Rec2020 monitor to do anything in that space, and neither do 99% of editors out there, so for most people, my HLG - Rec709 correction LUT is the best option :)

Cheers,

Paul :)
 
Michael_Richard said:
so basically MP4 HEVC format is H.265, which need Kaby Lake processors or better it seems
Click to expand...

Correct on HEVC = H265 but you don't need Kaby Lake to have it accelerated. Any GPU with H265 acceleration will do, as will Skylake and perhaps the previous generation. And that's only for hardware assisted decoding. Most modern CPUs can still handle 4K H265 in software quite adequately :)

HTH

Cheers,

Paul :)
 
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