How to achieve the quality of X264 "2pass slow" with NVENC HEVC? I used the Nvidia Card's picture quality enhancer (sharpening), and the results were fantastic.
I used the latest version of Staxrip, updated only some files manually.
Here is the sample file, I cut it out from blu-ray without re-encoding: 1080p@23.97 (600 Mbyte)
You can download it here (until a week) https://wsi.li/BEAWwFwfV7wQ
and you can repeat the test too.
REMEMBER: the file sharing service will delete automatically the files after 7days.
X264 2pass Slow option with the basic settings ("factory settings") proved to be similar or a bit worse than NVENC HEVC at the same bitrate with its built-in HARDWARE supported picture enhancer/sharpener.
I encoded both material with 2000 Kbit/sec, and later with 3800 kbit/s (average Youtube bitrate)
You can download the results here:
X264 2pass SLOW 2000 Kbps (48 Mbyte)
https://wsi.li/6iOFE54gW2Re
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NVENC HEVC 2000 Kbps (49 Mbyte)
https://wsi.li/o3uZ5UjpchUU
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The most important tests:
X264 2pass SLOW 3800 Kbps (88 Mbyte)
https://wsi.li/TfvHGS4LJRd0
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NVENC HEVC 3800 Kbps (88 Mbyte)
https://wsi.li/Tq3QBRHhMqc6
X264 staxrip settings
NVENC HEVC STAXRIP settings:
THE MOST IMPORTANT SETTING of the enhancer:
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Results in pictures: Save the images to watch them in full resolution, or copy the "image url" and open them in new tabs.
X264 (3800 kbps)
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NVENC HEVC 3800
I worked two days for the perfect option of the best settings for the enhancer.
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Last edited by Comparison; 8th Jul 2018 at 13:01.
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X265 2pass SLOW (factory settings) WAS humiliated by NVENC h265 with this settings:
https://image.ibb.co/fCsqcT/image.png
X265 2pass SLOW video (88Mbyte)
https://wsi.li/quEHu71ZWXCd
NVENC HEVC (88 Mbyte)
https://wsi.li/qGAp5097rJ5J
It is shocking good!!!!!!
I used only my GPU for image enhancement process and compress, and I achieved the quality of the X265 2pass SLOW.
So a video card with clever settings can create very very very good quality.
Images:
X265 2pass SLOW:
NVENC HEVC pictures
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Thanks for share the settings. That help me to rip a lot of videos and save time!
If you have new settings, please share it -
Is this now "the Flat Earth of video compression"? How do you prove your "same quality" claim?
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I want to see it with my eyes, not rely on yours.
PS: Not seeing any artifacts is no proof and no miracle. I want to compare some visible artifacts at the same bitrates for how annoying they appear to me.Last edited by LigH.de; 10th Jun 2020 at 01:20.
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Not to rain on anyone's parade, but of course nvenc matches x264+placebo in this test, I would have been shocked if it didn't.
Look at the test settings, source is "4:3 PAL DVD" and according to the screenshots he used a max of 17.5 Mb/s, max bit rate for DVD is 9.8 Mb/s mpeg-2, both those encodes are probably close to mathematically lossless at the tested bit rate. -
The real challenge is not to show no noticeable artifacts (due to plenty bitrate), but to make the inevitable noticeable artifacts (due to limited bitrate) look less annoying.
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