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14th October 2018, 02:33 | #53181 | Link | |
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Quote:
I thought that madVR does do dynamic tone mapping to adjust brightness to the whole image, but I think this only seems to work in SDR. It should be able to do this since it does know peak brightness of each scene. However, for most of the range when output in HDR, brightness seems to be unchanged. Is this due to the static metadata that is sent for HDR? Are our TVs only relying on the HDR nits mastering in the metadata to scale brightness? Maybe if the metadata can be manipulated to send peak brightness of the scene as mastering metadata, it may change the brightness range dynamically. I don't know. |
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14th October 2018, 04:34 | #53182 | Link | |||
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LG's active HDR dynamically adjusts the brightness of the entire image per frame. madVR does not. Because of this the madVR image appears too dark on most low/mid lit scenes compared to LG's implementation. Anyone who has an oled can clearly see the difference between the two. https://media.flixcar.com/f360cdn/LG...G_OLED_TVs.pdf Quote:
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Last edited by HDR; 14th October 2018 at 05:38. |
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14th October 2018, 06:30 | #53183 | Link |
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It's 'are you nuts!?' considering this is madVR, maybe this should be expected?
I'd like to put forward some new setting names. None - remove low - Pretty mad medium, Right mad High - Extremely mad Very high - Super mad Are you nuts!? - Chris Brown mad. |
14th October 2018, 07:26 | #53184 | Link |
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LG's dynamic tonemapping will literally brighten up any scene that isn't super bright already. I guess they implemented it for those watching in a bright room or for those that always complain about HDR being too dark. Personally I don't like it, it's like compressing the dynamic range of an audio track so that every scene has the same volume. With madVR dark scenes will stay dark unless you use a very low target nit peaks value.
Brighter isn't always better even if a lot of people seem to think that way... |
14th October 2018, 07:49 | #53185 | Link |
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?? Also Windows is using NV (Nvidia) for HDR output. To bypass the GPU you had to stream the video to the TV (or per USB). I do that often to see what Windows/madVR actually are doing wrong..
Last edited by blaubart; 14th October 2018 at 07:52. |
14th October 2018, 08:05 | #53186 | Link | |
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windows is not using nvidia API to accept an HDR image from software.
we currently have 3 different HDR APIs. windows own API. nvidias API and AMD API. but you are just making conclusion without even known this. Quote:
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14th October 2018, 09:19 | #53187 | Link |
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..angry huhn again - do you feel better now? My above conclusions in the end were right. Having wrong black/white clipping is in the end as easy as having a buggy driver version. No theories needed for that.
Last edited by blaubart; 14th October 2018 at 09:21. |
14th October 2018, 09:29 | #53188 | Link |
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do i really have to quote your ycbcr stuff?
just read the FAQ: https://forum.doom9.org/showpost.php...16&postcount=2 |
14th October 2018, 11:03 | #53190 | Link | |
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If you enjoy watching crushed blacks and a dim picture be my guest. |
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14th October 2018, 11:35 | #53191 | Link |
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Not really, its just "fake".
Actual dynamic HDR has mastering engineers controlling the parameters of every scene, so that intentional brightness differences are fully maintained, which can give a movie much more depth. Those automatic algorithms have no clue about the creative intent of a movie and they just "unify" everything, which can take away a lot of depth. For me, its in a similar boat to the extremely cranked up brightness and color vibrance, or those fake HDR encodes you can find online made from consumer SDR sources. It makes for good show floor presentation, but its far from the creative intent of a movie. If you are into that sort of thing, go nuts. But don't claim your subjective preference is the only valid way to watch anything, because thats just silly.
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LAV Filters - open source ffmpeg based media splitter and decoders Last edited by nevcairiel; 14th October 2018 at 11:41. |
14th October 2018, 12:03 | #53193 | Link |
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I am personally suspicious of someone whose account name is 'HDR' and whose very first actions on this forum consist of coming to madVR's thread just after the release of the best HDR processing featureset in a renderer, to say LG's TVs are doing a better job.
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14th October 2018, 12:36 | #53194 | Link | |
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Win11 Pro x64 b23H2 Ryzen 5950X@4.5Ghz 32Gb@3600 Zotac 3090 24Gb 551.33 madVR/LAV/jRiver/MyMovies/CMC Denon X8500HA>HD Fury VRRoom>TCL 55C805K |
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14th October 2018, 12:36 | #53195 | Link |
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a general question for the video experten here:
is it possible with madvr to use the GPU (for ex from a gtx 1060) to play mp4 video files instead of it being processed by the cpu ? my haswell i7 cpu seems to do most of the work , and i am hoping to offload it to the more modern GPU that might be more efficient (fine for mp4 @ 2k, but the cpu maxes out on 4k mp4 files while the GPU is only @ 10% load). with HEVC files of same resolution, the GPU does most of the work and the cpu stays @ 20 % for ex, this is much more hardware cpu/gpu efficient (i know hevc is a much more efficient file format, but am hoping the gpu can be used more for mp4 decoding now to) Last edited by zapatista; 14th October 2018 at 13:06. |
14th October 2018, 13:05 | #53196 | Link |
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Madvr doesn't do video decoding by itself, other components need to handle that. Usually, players/decoders that allow HEVC hardware decoding also allow H.264/AVC hardware decoding (H.264/AVC is the most common codec in mp4 files, but there are others). For example LAV Video/MPC-HC can do that.
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14th October 2018, 13:06 | #53197 | Link |
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Anyone else have a pinkish-magentish screen if you choose YCbCr 4:2:0 when watching HDR content (MADVR shows NV HDR...) ?
Switching to HDR mode using windows display settings , works fine. driver version : 416.34 , latest madvr build
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TV :LG OLED 65CX ; PC: CPU: Ryzen 9 3950X @43.25GHz ; GPU: Gigabyte GeForce® RTX 3080 GAMING OC 10G ;Memory: Corsair Vengeance RGB (2X16GB) DDR4 3600MHz, ; Last edited by kostik; 14th October 2018 at 13:12. |
14th October 2018, 13:16 | #53198 | Link | |
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Nobody can see into the ohters screen so no true comparision at all - so no truth at all - so happy dicussion till the end of all days.. |
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14th October 2018, 13:32 | #53200 | Link |
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Working fine with ycbcr 4:2:2/4:4:4 and RGB … only happens with ycbcr 4:2:0 when the screen switches to HDR mode (NV HDR not Windows HDR which works fine)…
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direct compute, dithering, error diffusion, madvr, ngu, nnedi3, quality, renderer, scaling, uhd upscaling, upsampling |
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