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23rd August 2012, 09:56 | #13743 | Link |
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Hi, i'm new to this forum and madvr. Is there a way to take advantage of my 10-bit display with regular (8-bit) blu-ray movies? I think something like 8-bit -> 10-bit on the fly conversion. Is this possible?
Anyway, every movie i have displays like this: h264(or vc-1) 8 bit 4:2:0 -> NV12 8-bit 4:2:0. Is this correct? Or is there a way to improve things? Thanks. |
23rd August 2012, 10:03 | #13744 | Link | |
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Quote:
So yes, h264(or vc-1) 8 bit 4:2:0 -> NV12 8-bit 4:2:0 is correct. |
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23rd August 2012, 13:36 | #13745 | Link |
/人 ◕ ‿‿ ◕ 人\
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"8 bit 4:2:0 -> NV12 8-bit 4:2:0" has nothing to do with output to display. It means that decoder decodes 8 bit 4:2:0 and ouputs it in 8 bit 4:2:0 format to madVR.
"conversion from 8-bit -> 10-bit" on that step can't hurt anything, because it's just adding zeros. However there's also no reasons to do this. |
23rd August 2012, 16:37 | #13746 | Link |
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Not to mention that a) madVR has no 10-bit output support, and b) only professional-grade GPUs support it (and those are pricey)
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LAV Filters - open source ffmpeg based media splitter and decoders |
23rd August 2012, 21:29 | #13751 | Link |
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The signal may be 10-bit, but your PC only renders 8-bit. Its artificial limitation mostly to get people to buy Quadro or FirePro cards when they need 10-bit for professional graphics work.
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LAV Filters - open source ffmpeg based media splitter and decoders |
24th August 2012, 01:07 | #13754 | Link | |
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I know some years ago you could actually unlock consumer cards to turn them into quadros. |
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24th August 2012, 09:29 | #13755 | Link | |
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In any case, 99% of all 10-bit encodes are not "real" 10-bit content. 10-bit encoding is only used because it can achieve better compression.
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LAV Filters - open source ffmpeg based media splitter and decoders |
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24th August 2012, 09:39 | #13756 | Link | |
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Quote:
For the quarter-pel motion-estimation mode, the pixel value could be taken from quartered-sub-pixel position. So it needs 10-bits to represent accurate sub-pixel value from 8-bit source pixel. After the most closest image is found, the residue color difference is processed by Forward DCT. Yet the fDCT process also needs at least 29-bit temporary data bit resolution for fixed-point data representation. (10-bit input pixel + 16-bit coefficient + 3-bit 8-tap inner-product operation) So do the motion-compensation + iDCT process. |
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24th August 2012, 12:09 | #13757 | Link | |
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Quote:
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24th August 2012, 15:39 | #13758 | Link |
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The "10-bit" option in MPC-HC is for the processing of its EVR renderers, much the same as madVR does "16-bit".
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24th August 2012, 16:11 | #13759 | Link |
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madshi
When madvr renders this sample it detects 3:3 cadence and switches to 23.976 display refresh rate in film mode. I guess it should switch to 59.94 for this 3:3 cadence? The sample is silent film and original frame rate is 21.4 fps http://www.imdb.com/title/tt0018737/. The sample: https://dl.dropbox.com/u/43376972/Pandora%203-3%20cadence.mkv Edit: So if original frame rate is funny 21.4 fps, they should transfer this silent film this way: 21.4 fps -> 19,98p (59,94/3) -> 59,94i (2:2:2 cadence) ? Last edited by nlnl; 24th August 2012 at 17:44. |
25th August 2012, 20:33 | #13760 | Link |
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I don't know if Madshi is still working on MadVR (been a while since any updates?). But was wondering what he and others thought of this.
http://darbeevision.com/ http://www.avsforum.com/t/1410383/darbee-darblet http://darbeevision.com/assets/documents/DarbeeVision%20Whitepaper%20with%20Tech%20Details%2020120415.pdf |
Tags |
direct compute, dithering, error diffusion, madvr, ngu, nnedi3, quality, renderer, scaling, uhd upscaling, upsampling |
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