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4th May 2019, 03:47 | #56121 | Link |
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How will Ultra HD Blu-ray content be handled by a monitor like the LG 34GK950F, which supports up DisplayHDR 400 and uses 8-bit+FRC (as I understand it , it's 8-bit plus dithering to simulate 10-bit)?
My gut tells me that it will be handled similarly to how SDR monitors handle it. That is, poorly. Unsurprisingly, I found it impossible to Google this question because I think very few people watch Blu-ray content (i.e., literally Blu-ray discs or rips thereof, not merely Netflix) on a computer monitor. Buuuut I knew just the place to ask! |
4th May 2019, 05:37 | #56124 | Link |
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@ HelmedHorror
Well, the main issue to work around is that it's ips with a contrast ratio of 1000:1 So , @ the peak 400cd, the black lvl is 0.4cd. Before worrying about peak brightness, what you need to understand is that the image loses alot of depth without at least a VA-panel. VA has ~2000-3000:1 contrast on pc monitors. On va-Televisions, it goes from 4000:1 to 6000:1 The 10bit SHOULD give you smoother gradient than on 8bit. But in most cases, Madvr does just as well with 8bit, because it has its own dithering capability. You may even consider using 144hz w/ LG's Motion blur reduction turned ON. The MBR cuts the brightness to 234.53cd, but that might actually be better depending on your room stimulus light. Overall, in a bright room, it should look pretty decent. the high black lvl will however eat most of the dark details. If you're using this monitor Long term for HDR movies, I recommend getting a colorimeter, so you can adjust blackoutput offset to tease out a just little more black detail, while still maintaining the more contrasty look. Boo @ 75% https://imgur.com/XAdPuib Boo @ 100% (more contrast, but too black for IPS) https://imgur.com/fjmHt4t
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Ghetto | 2500k 5Ghz Last edited by tp4tissue; 4th May 2019 at 07:23. |
4th May 2019, 09:45 | #56125 | Link |
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you don't lose dark details with a low CR displays. they just get less dark...
the screen simply has a similar if not better HDR as an entry level LG IPS UHD TV the total majority they sell but this is a gaming screen on top of it. |
4th May 2019, 15:17 | #56126 | Link |
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@HelmedHorror the last paragraph from the TFTCentral article you linked tells all you need to know about that monitor's HDR mode: basically, it's even worse than in SDR mode.
Setting madVR to tone map using 400 as peak nits and outputting SDR with the display backlight at maximum would give you the best quality IMO. The monitor still has a larger colour gamut than most SDR screens so you'll still benefit from that.
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4th May 2019, 15:19 | #56127 | Link |
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If by similar HDR you mean lacking contrast. then Yes. hahaha.
IPS blk lvl is too high. If the image has any dark noise, it can grey cast and fade the entire image. Had they graded the film FOR IPS, things would be different. Having high blk lvl is the same as having Missing gamut. Director intent is lost to some degree.
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Ghetto | 2500k 5Ghz Last edited by tp4tissue; 4th May 2019 at 16:42. |
4th May 2019, 15:21 | #56128 | Link | |
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I really don't think 400cd is a good idea here, but yea, try it, keep the room very bright to offset blacks. For 0.4cd to look black or even 0.2 cd, the room basically needs to be as bright as morning sunlight.
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Ghetto | 2500k 5Ghz Last edited by tp4tissue; 4th May 2019 at 15:25. |
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4th May 2019, 16:53 | #56129 | Link | |
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First I was afraid of micro stutters. But I don't think I have any. Perhaps only when starting the movie/pausing/resuming it. http://prntscr.com/nkcq5v Image of the stats on kodi. Using 12 RGB BIT here.. Don't rly see difference at first glance to ybcr Tried putting the TV on low blacks during mission impossible 2015 movie. And it looked better in my own personal opinion. With blacks on high it looked too bright and grey IMO. The blacks low make the blacks rly nice. Also RTings guide suggest to use Low black levels for my tv. EDIT: Just put up the mission impossible 2018 movie. And im getting stutters all over the place. Whereas 2015 mission impossible was fine today! http://prntscr.com/nkdc6g Lots of occasional glitches and frame drops. Any idea? Most of it is watchable but every minute or so something happens. sometimes a second only and sometimes several seconds. Last edited by chrisssj2; 4th May 2019 at 17:45. |
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4th May 2019, 18:44 | #56130 | Link |
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Long shot or not but if I want to zoom a 1080p60 video by 30%, why does mVR still does all its processing even on portions of the video that aren't shown? Wouldn't it be possible to only post-process(SSIM/NGU/etc) what's visible after zoom is applied? It's a waste of ressources and I might get away with higher quality picture if that was doable.
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4th May 2019, 19:21 | #56131 | Link | |
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4th May 2019, 20:17 | #56132 | Link | |
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Anyway I undid the suggested changed in the "Trade quality for performance" tab and set them to default. also changed back from RGB to YBCR. I don't actually know what caused it. But after changing those things the movie playbackked flawlessly. |
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4th May 2019, 20:27 | #56133 | Link |
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No, the player is doing the zoom and it does it by telling madVR to render to a larger size, madVR does not know exactly what part of the image is off the screen. That is also a pretty rare use case for a dedicated feature but a simple manual crop could do it (with more work) and be useful in other ways too.
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madVR options explained Last edited by Asmodian; 4th May 2019 at 20:30. |
4th May 2019, 20:33 | #56134 | Link | |
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Manual crop? With Avisynth in ffdshow in 8bit? No thanks |
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4th May 2019, 20:54 | #56135 | Link |
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I meant a new feature for madVR, a manual crop, not resurrecting ffdshow.
I used to think that madVR would never have those kind of features but we got denoising, deblocking, sharpening, etc. A crop does not seem inappropriate. Is madVR told by the player what portion to zoom into or is it simply told to render to a specific rectangle? I am pretty sure madVR simply gets told a target rectangle. It could assume (0,0) is the top left most visible pixel, and the display is a specific resolution, but I am not sure that would be true in all situations.
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madVR options explained Last edited by Asmodian; 4th May 2019 at 21:24. |
4th May 2019, 20:58 | #56136 | Link | |
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4th May 2019, 22:04 | #56137 | Link | |
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Code is kinda already there with black bars cropping and all so mostly a small change and we'd be good to go heh, sometimes I'd love to zoom in 1080p60 videos but it ends up in stutterland coz the 30/40% of picture that are invisible are being processed anyway. |
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4th May 2019, 23:15 | #56138 | Link | |
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Quote:
Playing a 23.976 @30 You say you are 12 Bit, which you are with nVidia. but madVR is outputting in 8 Bit you are at Limited should you be in Full ? Looking at the 2nd screen the GPU cannot cope at all and the frame rates are still off ? Unsure why you cannot see this, will it make a difference to the choppiness unsure. Ultimately madVR and nVidia are not in tune for the later cards, but the settings you are using will not help. Read this this thread to understand what the OSD means etc... https://forum.kodi.tv/showthread.php?tid=259188- 5. MEASURING PERFORMANCE & TROUBLESHOOTING
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Windows 10-1909 | i5-3570k | GTX 1070 Windforce OC Rev2 8GB : 430.64 | Pioneer VSX-534 | Philips 65PUS6703 - 65" Last edited by madjock; 5th May 2019 at 09:53. |
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5th May 2019, 13:29 | #56139 | Link | |
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Yes like I said suddenly with that movie it was completely unwatchable. But with the other movie it was perfect. Sounds strange no? So I should use nvidia's 24 hz setting? When playing RGB? or even if I choose to YCBR, always 24 hz rather then 60 hz? |
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5th May 2019, 14:22 | #56140 | Link |
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23 Hz for 23.976p
24 Hz for 24.000p 50 Hz for 25.000p, 50.000p and also interlaced 25.000i/50.000i (same thing) 59 Hz for 29.970p, 59.940p and also interlaced 29.970i/59.940i (again same thing) 60 Hz for 30.000p, 60.000p and also interlaced 30.000i/60.000i (and again same thing) Please note: 23.976 is 24.000/1.001 29.970 is 30.000/1.001 59.940 is 60.000/1.001 |
Tags |
direct compute, dithering, error diffusion, madvr, ngu, nnedi3, quality, renderer, scaling, uhd upscaling, upsampling |
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