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25th August 2019, 01:01 | #221 | Link |
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I'll still take it over no blending at all. Another benefit (for me anyway) of playback at 60Hz is no need for audio delay. Also with smooth motion there are no repeated frames, so custom resolutions become unnecessary.
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25th August 2019, 02:46 | #222 | Link |
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Yep, smooth motion is a great feature for OLEDs. It works way better than I would have expected.
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25th August 2019, 12:18 | #223 | Link | |||||
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If you have such a scene (preferably BD remux) then upload it somewhere. Quote:
"If you switch your GPU control panel to YCbCr, the GPU receives RGB from Windows, but you ask the GPU to send YCbCr to the TV. Consequently, the GPU has to convert the RGB pixels behind Windows' back to YCbCr. Some GPU drivers might do this in high bitdepth with dithering, which may produce acceptable results. But some GPU drivers definitely do this in 8bit without any dithering which will introduce lots of nasty banding artifacts into the image. Furthermore, there are various different RGB <-> YCbCr matrixes available. E.g. there's one each for BT.601, BT.709 and BT.2020. Now which of these will the GPU use for the conversion? And which will the TV use to convert back to RGB? If the GPU and the TV use different matrixes, color errors will be introduced. As a result I cannot recommend this configuration." Quote:
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It's like some basic processing is missing in low APL (darkish) scenes with LG's tonemapping (with and without LG's DTM) that destroys the image (madvr tonemapping can't help this). Interestingly I haven't spot wierd things in normal/high APL scenes. Download this sample (~3.6GB) (01-2160p_23fps_hdr0686-thgm_banding.mkv). I spotted at least 3 different problems (maybe 2nd and 3rd is the same), tested with passthrough + DTM + RBG full 12bit: - banding: e.g. red light of torches around @03:20 - added noise: @00:32, around @01:16 - posterisation: clouds in dark scenes, @03:20, @03:25, etc. Posterisation is just crazy sometimes! That's what you've noticed and I didn't so far. That's the biggest problem and this has nothing to do with 8bit vs 10bit as it's also present with 8bit. 8bit YCbCr 4:4:4 (limited) eliminates a lot of them, but there's still banding and the nasty posterisation still exist e.g. @03:25 (although removes it from @03:20). None of this happens in HDMI mode even with RGB Full 12bit!
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25th August 2019, 15:17 | #224 | Link |
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Hey for those using/testing madVR tonemapping (with the latest test build) with HDR output to your OLED, what tonemapping settings are you using in madVR? There's a ton of options and I don't really know what most of them do and what values to use. Also, if using DTM, does using madVR tonempping even make a difference? Any help here appreciated.
I did just manage to disable Real Cinema in HDR mode and it only took me 10 minutes lol. Smooth Motion is definitely the way to go with these. Last edited by iSeries; 25th August 2019 at 15:22. |
25th August 2019, 15:39 | #225 | Link | ||
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From Asmodian options guide: Quote:
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25th August 2019, 16:36 | #226 | Link | |
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-I have settled on disabling DTM on the LG for now...I may change this opinion once I do more testing. -I use unscrewed with measurement files. I don't try to get cute with them and modify them for more "dynamic" solutions. This is a very personal choice. For HDR tone mapping settings: -Target nit to 760 -Highlight recovery strength Are you Nuts? This is also a very personal choice as this can introduce ringing but damn it's nice IMO. -fire set to balanced I ignore the rest of it because I'm not using the live algo. I have unchecked everything in trade performance options. I use error diffusion 2, color checked. I use ngu aa high chroma. That about covers it. FOR ME.
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25th August 2019, 17:45 | #227 | Link | |
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if you use SM 24 hz with 23p file you get blended frames that are shown for about 42 ms which is very blurry. if you do SM at 120 hz with 23p the blurried frames are shown for 8.3 ms about every 42-8.3 ms and the far majority is not blended |
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25th August 2019, 18:58 | #228 | Link |
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Guess which one is pc-mode.
HDR RGB 8-bit (pc vs non-pc): HDR ycbcr 8-bit (pc vs non-pc): PC-Mode HDR completely fucks up the low end on my C8. Not only the banding but also the colors and it transitions into black too fast. I didn't even try to somehow calibrate this out because even then the banding would still remain. What's funny is when you use madVR's 'reduce banding artifacts' it sometimes makes the banding look even worse in pc-mode. I also tried this with 12-bit output but that didn't make it any better. Last edited by j82k; 25th August 2019 at 19:01. |
25th August 2019, 19:03 | #229 | Link |
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PC mode on these displays is completely broken IMO. I tried it before and had to turn it back off because the issues are just too much. It's nice to have chroma 4:4:4, no question, but, breaking so many other things defeats the purpose.
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25th August 2019, 19:49 | #230 | Link |
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I have been thinking the black crush on PC mode never got fixed with the latest C8 firmware. For SDR, I have bumped the luminance of the 5% 20-point to +10, but even then blacks seem to fall off way too much.
I have not watched enough HDR before or after the FW update to make a comparison. QB
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25th August 2019, 22:46 | #231 | Link |
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How does PC mode look with YCbCr444 limited range input?
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26th August 2019, 12:09 | #233 | Link | |||||||
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These are perfect examples! Quote:
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Just watched the new Men in Black HD10 passthrough in PC mode RGB Full 12bit + DTM: it was gorgeous! I tried to count how many times I notice some anomaly: 5 times during the whole movie. This is a very bright movie (9000 maxCLL, 4000 MDL, 942 FALL), probably that's why. Quote:
If you will come across such a sample upload it, please Quote:
That's why I'm still on 4.10.25 B8. Quote:
Fortunately my B8 was factory calibrated, original panel hasn't been replaced yet, so it has almost perfect gamma tracking in every mode (SDR, HDR10, DV; both in HDMI and PC mode). Quote:
The question is: can we do something about it by ourself? - we can modify the RGB values of White points in service menu - but I'm not sure about the screwed up 1dlut: can you correct it e.g. with Calman? - what else needs to be done in this case? (whether it's possible or not)
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26th August 2019, 17:46 | #234 | Link | ||
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I think LG only does a very basic 2-Point Gain RGB adjustment in the service menu for each panel. They don't do anything that would affect the black levels. So just a lack of quality control I guess... All you can do if you got such a crushed low-end panel is trying to find some combination of brightness/2P Low RGB/ 20-Point that fixes the low-end and doesn't raise true black... Last edited by j82k; 26th August 2019 at 17:51. |
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27th August 2019, 12:05 | #235 | Link | |
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Hmm, I might ask Ted
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27th August 2019, 16:44 | #236 | Link |
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Nope I've no desire to mess with the broken PC mode again either. 8 bit hdmi mode for me.
Sent from my SM-G975U using Tapatalk
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29th August 2019, 12:11 | #237 | Link |
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One thing I was wondering about, considering my current status as a plasma owner: if one looks closely to the pixels, on a plasma, one sees "noise". I think it's PWM noise. For many it's something they wanted to eliminate but I'm wondering if it would be feasible to replicate it on an OLED, through a shader or something. I am not sure but I'm half convinced that it was part of the "organic" look that many liked with plasma.
Edit: maybe using Random Dithering/Error Diffusion 1, with color noise and change dither for every frame could suffice? Testing this, I would say no. Last edited by ashlar42; 29th August 2019 at 12:27. |
21st September 2019, 08:43 | #239 | Link |
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LG 55EG920V with MadVR
I got this TV a couple years ago only to watch movies. In the store the TV was demoed with a 4k opera, and the image was breathtaking, and it looked like HDR. All reviews I saw highlighted the possibility for HDR images. Quite a while late I learned that the HDR was only possible when feeding the images via a USB stick (!) not via HDMI, and that it was caused by a software flaw that LG had no intention of correcting. HDMI input gets overridden, I understand. I've got two questions, first, does this influence the usage with MadVR? Second, is there a workaround, say via a service menu settings, to get HDR on this panel from the HDMI input?
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