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18th January 2022, 19:50 | #121 | Link | |
Broadcast Encoder
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Quote:
I'm at work, I don't have any consumer BAT files, I encoded what was more convenient for me eheheheh Exactly. Last edited by FranceBB; 18th January 2022 at 19:52. |
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18th January 2022, 19:57 | #122 | Link |
Life's clearer in 4K UHD
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Thanks guys,
Needless to say, I'd be most interested in seeing some of 'before' (HEVC HDR10) and 'after' (HEVC HDR10 HLG) HEVC encoded samples, to see how well my TV and OPPO handles them
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18th January 2022, 20:07 | #123 | Link | |
Broadcast Encoder
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I'm a consumer myself, by the way, regardless of my job I watch TV series too, so my library is made of consumer BD eheheheh I can share a sample, I should have something somewhere, but it's gonna be short. Perhaps Gemini Man could be a good fit. I'll do that tomorrow, though, right now I'm at dinner and later I'm gonna watch Brighton Vs Chelsea |
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18th January 2022, 20:23 | #124 | Link | |
hlg-tools Maintainer
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Quote:
http://wswartzendruber.net/videos/ EDIT: What is "HDR10 HLG?" |
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20th January 2022, 16:48 | #127 | Link |
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There is something that I still cannot wrap my head around. The PQ standard is very obvious and strict in that it's actualy a standard of absolute luminosity. Why do the movies then need such a wide range of lum-scale to equalize them?
Last edited by ErazorTT; 20th January 2022 at 18:12. |
20th January 2022, 21:48 | #128 | Link | |
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Alita: Battle Angel puts it around 47 nits (the darkest I've encountered). Shazam's is something stupid like 500+ (the brightest I've encountered). I have no idea why studios are all over the place with it. EDIT: I've noticed something somewhat common. Once you adjust the luminosity, the internal MaxCLL value ends up being very close to 1,000 nits. Sometimes I wonder if these movies aren't graded to 1,000 nits with reference white at 203 nits, and then scaled down so that TVs that can't reach 1,000 nits can still display more of the originally intended changes in brightness. EDIT: And I was wrong about Shazam. It's reference white level is only 369 nits or thereabouts. Last edited by wswartzendruber; 21st January 2022 at 06:31. |
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21st January 2022, 10:05 | #129 | Link | |
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21st January 2022, 17:11 | #130 | Link |
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(internal MaxCLL) = --max-cll * --lum-scale
or (internal MaxCLL) = --max-cll * (203 / --ref-white) It's not something you really need to take into consideration, however. pq2hlg determines this value for you. If it exceeds 1,000 nits, then pq2hlg will generate a tone map curve specific to the internal MaxCLL value. |
21st January 2022, 19:19 | #131 | Link |
Broadcast Encoder
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Little update: I'll delay the encode and share of a real life sample a bit 'cause FFMpeg 5.0 introduced IMF decoding and it's something I've been waiting since April 2016 (when no one really knew anything about it and there was no way to work with it) so I'm as happy as Larry
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22nd January 2022, 11:38 | #132 | Link |
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Alita has 5 different cll metadata:
LIGHT 285 63 LIGHT 737 130 LIGHT 1000 18 LIGHT 257 1 LIGHT 505 13 The core movie at 737 130. Includes HDR10, DoVi, and HDR10+ That is the culprit. Someone played with parameters without changing the content. The mastering display has 1000 nit / 0.0001 nit. So stay on the standard with the PQ_to_HLG matrix (1000nit), and you will get a perfect HLG conversion. Testet on LG OLED48CX. |
22nd January 2022, 12:24 | #133 | Link |
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Content light metadata are only used if the display has not the desired luminosity. HDR10 strictly follows smpte2084. The TV scales itself brightness and contrast.
HLG arib-std-b67 is based on max 1000nit. The TV knows that and scales brightness automatically without HDR metadata. repeat-headers for HLG is not necessary. Last edited by frank; 22nd January 2022 at 12:34. |
22nd January 2022, 18:36 | #134 | Link | |
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25th January 2022, 04:20 | #139 | Link | |
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27th January 2022, 22:02 | #140 | Link |
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Thank you!
On my Alita tests I saw a big issue. VLC and mpv have different display outputs. mpv goes much earlier into level saturation! I only can go until -l 2.5...3.0 for HLG. Otherwise you will be dazzled by white. Which prog does it right? Different specs? max cll 100 vs 203? I'll make further tests with the built-in player of LG TV. -------------- System: Win 10 Pro on Dell XPS 15 9510 Last edited by frank; 27th January 2022 at 22:07. |
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