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23rd June 2014, 01:23 | #26703 | Link | |
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23rd June 2014, 01:42 | #26704 | Link |
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Is there a method where MadVR can determine what type of video it is and select the settings based off of that?
Example: If I am running 1080p video then I know I won't use Luma Image Doubling and therefore can put more GPU processing power into the Chroma Upscaling. However, if my source video has lower resolution I can reduce the Chroma Upscaling because I know I will be putting more processing power into Image Doubling. Hope that exists and my description makes sense. |
23rd June 2014, 01:46 | #26705 | Link |
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madVR has profiles just for that. Check the first couple posts in this thread, madshi has a small guide there how to use them.
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LAV Filters - open source ffmpeg based media splitter and decoders |
23rd June 2014, 02:58 | #26706 | Link | |
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http://i.imgur.com/7lFvOsn.jpg Last edited by tjcinnamon; 23rd June 2014 at 03:39. |
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23rd June 2014, 03:16 | #26707 | Link |
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I'm having issues scouring the forums trying to find out the difference between Chroma Upscaling, Image Upscaling, and Image doubling.
If I have a 1080p video with a 1080p display I can leave Image Doubling off correct? If I have a 720p video with a 1080p display, should I set my Image doubling to 2.0, 1.5, 1.2, or Always? How many neurons (32?) What will give me the most "bang for my (GPU) buck"? Image Upscaling or Chroma Uplscaling? Do I need Image upscaling with 1080p? I'm trying to set up profiles. Thanks, JOe K. Last edited by tjcinnamon; 23rd June 2014 at 03:39. Reason: re-arranged questions |
23rd June 2014, 07:43 | #26708 | Link | |||
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64 is somewhat better if the GPU power is affordable w/o crazy noise. Otherwise 32 is indeed recommended for Luma. I also set the Chroma Upscaling with NNEDI3_16 regardless of contents. For 720 content to 1080, Image Upscaling is set the Lanczos4AR, and Image Down-scaling is set to Spline3AR_LL -- according to some discussion about the negative text border effect of Lanczos3LL or Lanczos3AR. Quote:
If you want to run 1080p24 content's Chroma Upscaling with NNEDI3_256, I guess R9 290X or GTX Titan might be required... ps: Don't forget the workload of 1080p resolution is exponential times of 720p, and again for 480p / 360p . For the 50i / 60i interlaced contents, it makes the GPU work-load about 2.2 ~ 2.5x times of 24fps film contents with vector-based-pixel-adaptive + frame-doubling deinterlacing. Last edited by pie1394; 24th June 2014 at 03:52. |
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23rd June 2014, 12:46 | #26709 | Link | |
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With the resources you free up disabling Image doubling you could enable Error diffusion or up neurons in upscaling (if you choose to use NNEDI3 for that). Most people have said they don't see significant (if any) benefit from using image doubling with hd content going from 720->1080. My suggestion is experiment by playing part of a 720p video with it enabled, and then play that same part with it disabled. If you notice a difference that is beneficial with it enabled then use it, but if you do not then disable it to free up those resources. Unlike Image Doubling which can be unchecked there is no way to disable either of the upscaling configurations in madVR. Most people here would probably recommend setting it to Jinc 3 taps if your system can handle it, and keep low render numbers. It depends on your graphics card/chip, but most people (with decent gpu(s)) will see the lowest render times with good quality selecting DXVA2 for image upscaling. My recommendation would be to make a profile for 1080 Image Upscaling, and try DXVA2. If you see pixelation or a drop in perceived image quality then you could switch back to Jinc, but DXVA2 would be the closest you'll get to disabling it.
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23rd June 2014, 15:46 | #26710 | Link |
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From first hand experience I can say I can see a significant improvement in image doubled 720p content over upscaled 720p content when watching on a 1080p display. I use 128 neurons. For example hair on peoples arms is rendered much sharper in my opinion.
My settings are: chroma upscaling: nnedi3 128 neurons, image downscaling: cr ar ll, image upscaling: jinc3ar, dithering: ED2 + both options. |
23rd June 2014, 19:56 | #26712 | Link |
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Chroma resizing in MadVr is only use to turn not 4:4:4 YCbCr into 4:4:4 YCbCr nothing else.
image upscaling/downscaling is used for image upscaling/downscaling(i'm so genius i know) it takes the image after image doubling and scales it to the target resolution. read this: http://en.wikipedia.org/wiki/Chroma_subsampling all BD and DVD are subsampled to 4:2:0 |
24th June 2014, 02:07 | #26713 | Link | |
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Image Doubling on vs off On the topic of wasted resources. I did some experimenting, and it seems like a waste to use Jinc for Image Upscaling. The image on the left (below) uses bilinear image upscaling while the one on the right (below) uses jinc image upscaling. I don't see a significant difference, and going with bilinear drops the render times by around 10ms. Bilinear vs Jinc image upscaling
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System specs: Sager NP9150 SE with i7-3630QM 2.40GHz, 16 GB RAM, 64-bit Windows 10 Pro, NVidia GTX 680M/Intel 4000 HD optimus dual GPU system. Video viewed on LG notebook screen and LG 3D passive TV. |
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24th June 2014, 10:30 | #26714 | Link | ||
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Sometimes, depending on the source, you can get a (subjectively) better image by using cheaper algorithms, because they blur details and hide noise that shouldn't be there in the first place. All in all, for your example you're right, but you can't say your findings are true for every video out there |
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25th June 2014, 11:14 | #26717 | Link |
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vt50 settings
Hi
I have panasonic vt50 (16-235) plasma. Windows 8 using ATI 280x with latest driver. Using mphc, lav and madvr. Is the correct settings: ATI CCC: pixel format: RGB 4:4:4 (Limited RGB) ATI CCC: Video: Dymanic range not selected LAV Video Decoder: RGB output leves: untouched madvr: RGB output leves: TV levels (16-235) Is this correct? Thx in advance |
25th June 2014, 12:05 | #26720 | Link | |
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ATI CCC: pixel format: RGB 4:4:4 (Limited RGB) madvr: RGB output leves: PC levels (0-255)(which is the general-purpose solution), or to ATI CCC: pixel format: RGB 4:4:4 (Full RGB) madvr: RGB output leves: TV levels (16-235)(which is probably the preferred solution if you care only about your videos displaying correctly - be warned: anything other than madVR will display incorrectly, with clipped colors). In your current setup, madVR squeezes the 0-255 RGB data into the 16-235 range, and later, your video driver squeezes that 16-235 data, which it thinks is 0-255 data, into 16-235 again! |
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Tags |
direct compute, dithering, error diffusion, madvr, ngu, nnedi3, quality, renderer, scaling, uhd upscaling, upsampling |
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