FS7: Fs7 Slog3 Sgamut3.cine to HDR10 (HDR youtube)

[rudo_fr]

I would transform an Adobe Premiere Pro cc18 editing project with Fs7 files (X-avci 10bits, Slog3 Sgamut3.cine, color corrected with lumetrie: Lut Slog3ToRec709) to export HDR10 vidéo files for Youtube.

As i can't have HDR playback to my monitor during Editing work (even with my Dell up2718Q HDR10 compatible because Windows desktop is SRVB),
does anyone have a way with Lutcalc to made one lut to simulate HDR10 on Srvb monitor?
and one other lut to convert Slog3 Sgamut3.cine to Rec2100 PQ?
by this way i could adjust color and exposure correctly before export HDR10 vidéo file.

Any experience is welcome.

At the moment, my only way to see correctly HDR10 content on my windows10 Workstation is to look HDR videos on YouTube.
(with Chrome browser on my Dell up2718Q monitor (Rec2020, 1000nits, 10bits).

Exemple of video HDR10 on youtube: https://www.youtube.com/watch?v=AFETntYsC8o
(need a monitor compatible HDR10)

 

[Tom Roper]

I been doing HDR10 for a long time now. Doing HDR10 without a proper HDR10 capable monitor will be difficult. You'll be creating luts scene by scene because it uses display targeted brightness instead of scene gamma. The easiest path to YouTube HDR is to forget about HDR10 and do HLG instead. That you can grade on a 709 monitor with a reasonable expectation the graded output for HLG will be close. So either get a proper HDR10 monitor for grading or give up on that idea and use HLG which can look arguably better in some situations like viewing output in brightly lit viewing rooms, sports events, documentary, short form. HDR10 is more cinema like, retains more shadow detail, to see it consistently means viewing in darkened viewing conditions. Highlights in HDR10 are more specular in nature. This can be very realistic, as well there's more color volume retained as luminance is raised, which is another caveat to be careful about if trying to grade HDR10 on a SDR monitor, certain features like women's makeup foundation appears prominent as a separate layer if skin tones are put up into the upper HDR zones above 100 nits. Your talent will want you fired if you let that happen. The ability to separate, delineate specular highlights that can and should be pumped up to 1000+ nits has to be done carefully to prevent non-wanted features like skin tones from reaching the upper zones above 100 nits. Can't emphasize it enough. You need a HDR10 grading monitor or you'll be redoing it all trial and error scene by scene. The benefit of greater color volume at high brightness nits is exclusive to PQ st2084 EOTF, thus HDR10, Dolby Vision and Technicolor. The benefit has companion worries just mentioned, skin tones reaching too high. HLG does not have the benefit but also does not have the problem. It's much simpler to grade, looks fantastic but it is a different look. Since it is scene based gamma not display targeted nits, as your highlights stretch into the high brightness range the mid range rolls up as well, a more familiar 709 type of look that looks great in any light, less specular, you don't have to worry so much about skin tones blooming or makeup foundation jumping off the face into a separate bright color layer as can happen with improperly graded HDR10, but still an enhanced dynamic range viewing experience. YouTube accepts both formats. With either one, YouTube will create an SDR copy. For either format, you can attach a cube lut to your upload to give hints to the YouTube encoder how the SDR copy should look. This is an especially important step since currently most viewers will be watching the videos in SDR. In either case of HDR10 or HLG, the YouTube SDR copy will otherwise appear overly flat and comparatively lifeless primarily because the copy will be in 2020 color which will look flat on 709 monitor. YouTube has a help topic for content creators on how to create and attach a cube lut to your upload. Following is a link to my most recent YouTube HDR upload in HLG. What it mainly demonstrates is that the SDR copy can be colorful and retain much of the sparkle of the HDR version. https://youtu.be/iUMUkVLm2ps