Welcome to Doom9's Forum, THE in-place to be for everyone interested in DVD conversion. Before you start posting please read the forum rules. By posting to this forum you agree to abide by the rules. |
2nd June 2019, 04:12 | #56423 | Link |
Registered User
Join Date: May 2013
Posts: 712
|
@garson,
is there a reason you're watching a 720p file ? is that just for testing ? Scaling 720p to 1080p results in far worse quality and more gpu use than simply watching a 1080p file.
__________________
Ghetto | 2500k 5Ghz |
2nd June 2019, 04:46 | #56424 | Link | |
Registered User
Join Date: Feb 2019
Posts: 231
|
Quote:
The projector is doing the vertical stretch. We don't use madvR to do the stretch for other reasons. (rendering times go from 30ms to 300ms when we enable anamorphic stretch in madVR due to how the image and chroma scaling compound or something like that.) His screen is 2.37:1 and the movie is 2.40:1. What he normally does, is zooms the projector so that the narrowest movies (2.40:1) fill the screen vertically, and then that means they overshoot the sides by a bit. This also means that 2.35:1 movies will overshoot all 4 sides. Normally with a decent projector this isn't a problem since they offer image masking, and you just mask off the 4 sides of the projector's image to fit your screen perfectly. This is what he did on his previous JVC RS600. However, he just got a BenQ LK970 laser projector that does not have this masking option. I think another issue is that his anamorphic lens is not perfect and it stretches the image horizontally slightly more than it should. So the issue is that if he wants to fill his screen vertically, the image will always overshoot his screen horizontally. This is why we need to cover some of the projector's image with black essentially so that the overshoot is invisible. I am trying to understand your edited response, but I will have to think about it some more. Maybe my latest reply here sheds some more light on the set up and what we are trying to achieve. Recap: 2.40 movie, stretched vertically by the projector to fill the projector's full 16:9 panel. Projector stretch is a 2.35:1 -> 16:9 stretch, so there is still a small black edge on the top and bottom of the projector's 16:9 panel after it vertically stretches 2.35:1 -> 16:9, because the movie is 2.40:1. Projector is lens zoomed to make the 2.40:1 image fill the 2.37:1 screen vertically. This leaves a horizontal picture overshoot due to 2 factors. 1, because 2.40:1 is a wider aspect ratio than his screen, and 2, because his anamorphic horizontal stretch lens is not perfect and stretches the image slightly too far. What we need to do in some way is to take a 2.40:1 movie and essentially crop off the sides a bit to make it a narrower aspect ratio. In truth we would also probably crop the top and bottom a little bit too, but again this is a crop that really is just trimming off some of the image data turning it into black, hopefully no zooming or scaling should be taking place or else that just messes it all up again. So if you viewed this on a normal monitor, it would look like the video does not fill all the way to the edge of the screen, but it's not shrunk so scaling is not affected, it's just covered up by black. Need to render a black border over the top of the video to cover up some of the video on the sides and a little bit on the top and bottom too ideally. Last edited by SirMaster; 2nd June 2019 at 04:52. |
|
2nd June 2019, 07:45 | #56425 | Link |
Registered User
Join Date: Feb 2002
Location: San Jose, California
Posts: 4,407
|
Is it a really weak GPU or using crazy upscaling settings? 300ms is way too high for reasonable settings on even a low end dGPU.
madVR cannot do this, you need a manual crop option and madVR is designed assuming you are not willing to lose more than 7 lines of the image off all sides under any circumstances.
__________________
madVR options explained |
2nd June 2019, 16:13 | #56426 | Link | |
Registered User
Join Date: Dec 2014
Posts: 1,127
|
Quote:
If you don't have the ability to crop an image, showing a 2.40:1 movie on a 2.35:1 or 2.37:1 screen would require leaving small black bars at the top and bottom of the image, like this, rather than have the image spill out the sides: 2.40:1 movie on 2.35:1 screen If you define at 2.37:1 rectangle in screen config (3840 x 1620 or 4096 x 1728), then zoom control will crop all content to fit this rectangle, so it should always have the correct width and height to fit a 2.37:1 scope screen with cropping when necessary. Under zoom control, you need to select automatically detect hard coded black bars and if there are big black bars ...zoom the bars away completely. I really don't know how an anamorphic lens works in practice. So I can't tell you if the lens will stretch this rectangle correctly. You should be able to use the anamorphic stretch in madVR with zoom control enabled. If you are outputting to 4096 x 2160p, then set image upscaling to something like Lanczos3 + AR to lower rendering times for the required upscaling. I think the anamorphic stretch looks right without screen masking in screen config with zoom control set to automatically detect hard coded black bars and if there are big black bars ...zoom the bars away completely. I wrote some instructions on zoom control in the madVR guide in my signature (under 2. Processing) that could be worth reading. There are also some pictures with my TV used as the example projector screen to show what zoom control is doing, but there is no anamorphic stretch in the example. Because I can't test this, I'm not sure if I got the instructions right. I guess you can try them and report back...
__________________
HOW TO - Set up madVR for Kodi DSPlayer & External Media Players |
|
2nd June 2019, 18:45 | #56427 | Link | |
Registered User
Join Date: Apr 2018
Location: Paris, France
Posts: 92
|
Quote:
Bottom line : no, I don't think you can "un-teal & un-orange" a movie that has been color graded this way
__________________
Charky "Rule #1 : If it works, don't change anything." |
|
2nd June 2019, 20:15 | #56428 | Link | |
Registered User
Join Date: Feb 2002
Location: San Jose, California
Posts: 4,407
|
Quote:
This is why it cannot be done with madVR.
__________________
madVR options explained |
|
2nd June 2019, 20:55 | #56430 | Link | |
Registered User
Join Date: Oct 2012
Posts: 7,926
|
Quote:
|
|
2nd June 2019, 21:10 | #56431 | Link | |
Registered User
Join Date: Feb 2002
Location: San Jose, California
Posts: 4,407
|
Quote:
I forgot that zoom big black bars away is willing to lose any amount of image area.
__________________
madVR options explained Last edited by Asmodian; 2nd June 2019 at 21:12. |
|
2nd June 2019, 21:28 | #56433 | Link |
Registered User
Join Date: Feb 2002
Location: San Jose, California
Posts: 4,407
|
Why does it increase the rendering time?
__________________
madVR options explained |
2nd June 2019, 22:02 | #56435 | Link |
Registered User
Join Date: Feb 2007
Posts: 25
|
HDR Anomaly
I have been testing HDR on the latest build passing thru metadata. HDR mode kicks in perfectly, unfortunatley it gets stuck in HDR mode until I reboot the PC. Is this a known anomaly?
__________________
EVGA GeForce GTX 1060 6144MB: JRiver Video Player: Win 10 OS: Sony VPL-VW760 Projector Last edited by Village Guy; 2nd June 2019 at 22:06. |
2nd June 2019, 22:30 | #56436 | Link | |
Registered User
Join Date: Nov 2014
Posts: 81
|
All the movies in Nolan UHD set and upcoming Batman/Returns/Forever/&Robin UHD release. Harry Potter UHD releases. There are more, and Warner Bros is the worst offender.
Note that none of these movies had orange-teal grading originally - even in their BD releases. This is something the studio did *after the fact* for 4K releases to make things pop. But it looks awful, not to mention it is not Director's original intent. Quote:
|
|
2nd June 2019, 22:41 | #56437 | Link | |
Registered User
Join Date: Feb 2019
Posts: 231
|
Quote:
I am dealing with 4K tone-mapped video on a native 4K display, so processing starts to get really extreme when it has to upscale chroma and luma and do tone-mapping. Normally there is no luma upscaling because its 4K native on 4K. And when it's 1080p video there is no tone-mapping because its SDR. It works if I set chroma and luma scaling to Lancosz AR for instance. But if I set chroma and luma to NGU sharp medium even it's like 80-100ms render times even on a 2070 or 1080. There is no way to make this work without using the anamorphic stretch I'm guessing. The whole zooming away black bars stuff is what makes it only work if I fill the 16:9 panel with the 2.40:1 video via anamorphic stretch factor 4 / 3. I wish madVR just had a simple image cropping option that didnt require this zooming stuff and just took the picture as is, 1:1 on the screen, and allowed to cover the edges with a specific amount of black like some projectors allow. Last edited by SirMaster; 2nd June 2019 at 23:38. |
|
2nd June 2019, 23:02 | #56438 | Link | |
Registered User
Join Date: May 2011
Posts: 51
|
Quote:
I just tried now with EVR instead of MadVR and looks like file is just like that, small stutters in some scenes. |
|
3rd June 2019, 00:13 | #56439 | Link | |
Registered User
Join Date: Oct 2018
Posts: 324
|
Quote:
|
|
3rd June 2019, 00:20 | #56440 | Link | |
Registered User
Join Date: Feb 2002
Location: San Jose, California
Posts: 4,407
|
Quote:
Can you do a blind test with an assistant? See if you notice an improvement from NGU upscaling compared to Jinc.
__________________
madVR options explained |
|
Tags |
direct compute, dithering, error diffusion, madvr, ngu, nnedi3, quality, renderer, scaling, uhd upscaling, upsampling |
|
|