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11th April 2014, 16:33 | #25862 | Link |
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NNEDI3 is the name of the algorithm.
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LAV Filters - open source ffmpeg based media splitter and decoders |
11th April 2014, 17:51 | #25865 | Link | ||
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Quote:
The whole point for me with CUVID is that it runs on the GPU(using the PureVideo routines so it's not hogging mVR's potential cycles) & it especially doesn't work behind Reclock's back...I can just pop a PAL or NTSC interlaced video DVD in, LAV does the 2X magic, mVR rolls refresh rates automatically et voilą: 50/59.94fps video upscaled via NNEDI, what a fantastic way to give DVD's a second youth James Cameron said that he would prefer a higher fps rate over a higher resolution and I haven't run any real-world comparison but there's a good chance that I would pick NNEDI'ed 540p59.94/576p50 DVD's over 25/29.97 720p. Quote:
Last edited by leeperry; 11th April 2014 at 17:53. |
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11th April 2014, 20:10 | #25868 | Link |
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Another advantage I found of new window mode is it properly detects video when film mode is forced as 2:2.
Would it be possible to detect between 25/29 and 50/59 native fps rather than toggling double framerate deinterlacing? A lot of interlaced footage is only 25/29, there isn't any advantage to outputting this at 50/59 fps is there?
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11th April 2014, 20:28 | #25869 | Link |
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If its interlaced, then it needs to be output at twice its rate (ie one frame for each field), or you lose information.
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LAV Filters - open source ffmpeg based media splitter and decoders |
11th April 2014, 21:06 | #25870 | Link | |
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Quote:
https://esports.geforce.com/forums/topic/527075/geforce-drivers/hardware-acceleration-decoding-issue/1 and https://esports.geforce.com/forums/topic/616833/geforce-drivers/hardware-acceleration-decoding-issue-new-/
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11th April 2014, 21:17 | #25871 | Link | |
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AMD's vector adaptive deinterlacer seems to detect this well too. Makes you wonder why so many TVs (even high end ones) seem to have issues detecting 2:2 cadence.
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TV Setup: LG OLED55B7V; Onkyo TX-NR515; ODroid N2+; CoreElec 9.2.7 Last edited by DragonQ; 11th April 2014 at 21:22. |
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11th April 2014, 21:19 | #25873 | Link | |
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Its a very rare occurrence really, I've never encountered it in any real video, only weird short sample clips people post here. If you want to compare, AMDs hardware acceleration is anything but glamorous.
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LAV Filters - open source ffmpeg based media splitter and decoders |
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11th April 2014, 22:47 | #25874 | Link | ||
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Quote:
EDIT: removed video link, it wasn't native 29. Quote:
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12th April 2014, 00:49 | #25875 | Link | |
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But this is extremely rare if you are watching commercial content i.e. Blu-ray discs. I've only seen it happen twice out of probably thousands of discs at this point. |
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12th April 2014, 01:00 | #25876 | Link | ||
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Quote:
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If you do not trust nevcairiel on this point, this is from 100fps.com interlaced video "Because of this time intermix (1 frame=time1+time2) it is impossible to: 1) deinterlace a frame AND 2) keep 25 frames/second AND 3) keep the full quality (=all information of a picture). Impossible. You will have to alter at least one of those points. Except, when there was no motion." |
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12th April 2014, 02:44 | #25878 | Link | ||
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Quote:
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I think AMD has recently put some effort into making their hardware decoding more resilient and I have been unable to find any recent reports of issues like those but there was this example from 2010. Of course they have their own odd random issues. |
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12th April 2014, 05:18 | #25879 | Link |
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Asmodian: I'm not talking about playing native 59 fps at 29 or 59, 59 would be optimal and that's what all those samples (except mousse_smooth_big.avi is kind of close, duplicate frames to go from 24 to 50) on 100fps is discussing. I'm talking about native 29 fps played at 59 fps by duplicating every frame. Is there some advantage to it or is it just a waste of gpu and would be better off just playing at 29 fps?
Nevermind the video sample above, it played in wtv as 29 and 59 fps but detects as 3:2 in mpg. I think it's a potplayer issue, resolution is detected wrong too. Here's a native 29 fps video. Screenshots of a 29 fps frame is bit identical to the 2 59 fps frames. This could be about a 50% performance gain with the relatively common native 29 fps videos when double rate deinterlacing is enabled. Another large performance gain could be checking 50 and 59 fps for film. It's quite common to see film in 720p59. Just giving madshi some ideas if he hasn't already thought about it. i can provide samples when the time comes.
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PC: FX-8320 GTS250 HTPC: G1610 GTX650 PotPlayer/MPC-BE LAVFilters MadVR-Bicubic75AR/Lanczos4AR/Lanczos4AR LumaSharpen -Strength0.9-Pattern3-Clamp0.1-OffsetBias2.0 Last edited by turbojet; 12th April 2014 at 05:25. |
12th April 2014, 06:52 | #25880 | Link |
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I've been messing with the settings trying to get the best setup for 720p->1080p NNEDI3 doubling, and I was noticing something was off but I couldn't pinpoint it until now. No matter what algorithm I use for downscaling, I get aliasing with text if anti-ringing is used. Anything else and text looks great, even Lanczos4 (no AR). Has anyone else noticed this or knows why this happens? I don't see any more ringing with it turned off, so I'm just going to leave it off for now.
Last edited by StinDaWg; 12th April 2014 at 06:59. |
Tags |
direct compute, dithering, error diffusion, madvr, ngu, nnedi3, quality, renderer, scaling, uhd upscaling, upsampling |
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