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13th January 2022, 03:29 | #621 | Link | |
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14th January 2022, 12:29 | #622 | Link | |
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But I prefer H.26x formats because comparing YouTube/Facebook/Insta/Twitter's H.264 with VP9/AV1, the quality of H.264 (call it x264) was always better. (VP9/AV1 is too blurry) Last edited by PCU; 14th January 2022 at 12:42. |
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14th January 2022, 12:48 | #623 | Link | |
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14th January 2022, 15:40 | #624 | Link | |
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https://www.youtube.com/watch?v=_GOR5gvQwDI |
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14th January 2022, 16:04 | #625 | Link | |
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It's not obvious when youtube encoded the video, looks like 3.5 years ago, probably at the time their VP9 encoder was not good or/and didn't have enough bitrate. Code:
20092622 Oct 25 2018 'Simple Plan - I'\''m Just A Kid (Official Video)-_GOR5gvQwDI.mp4' 12959041 Oct 25 2018 'Simple Plan - I'\''m Just A Kid (Official Video)-_GOR5gvQwDI.webm' Last edited by birdie; 14th January 2022 at 16:14. |
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14th January 2022, 17:26 | #626 | Link | |
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Also, AV1 still is bad, just download one of the Gamers Nexus videos and check how bad is the AV1 version. Last edited by PCU; 14th January 2022 at 17:32. |
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14th January 2022, 20:18 | #627 | Link | |
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or its more advanced fork https://github.com/yt-dlp/yt-dlp |
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15th January 2022, 01:17 | #628 | Link |
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Also remember: YouTube recodes all videos with a rather constant bitrate as target for streaming over a limited bandwidth; this returns anything but optimal quality per bitrate. Different codecs may use substantially different strategies to distribute the bitrate across a video playback buffer. Especially a patent-free codec may need to avoid patented algorithms which may be useful for this specific use case. Disclaimer: I may or may not be wrong in my claims.
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17th January 2022, 10:41 | #630 | Link | |
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18th January 2022, 04:58 | #631 | Link | |
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Die Size and Area are less of a problem with leading edge node. But yes thermals and energy usage. Especially Apple which has a stringent requirement. Both VP9 and HEVC decode 4K content on Apple SoC with less than 150mW. There are three ( or four ) hardware decoding IP, but I am not aware of any of them that offer this low level of of AV1 decoding energy usage. And Samsung just announced Exynos 2200 with AV1 decoding, but no EVC decoding or encoding support. But I am getting a little frustrated and losing patient with the lack of progress. AV2 is nowhere to be seen. x266 no show. EVC missing.
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Previously iwod Last edited by ksec; 18th January 2022 at 08:51. |
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21st January 2022, 20:03 | #634 | Link | |
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They are inferred from Qualcomm's public statement. New Video engine which includes VVC was originally scheduled for ( end of )2021. This got delayed and confirmed in recent Snapdragon Tech Submit. We also know Qualcomm has engineers working on AV1 "decoding". ( Again, decoding, no idea on encoding ) And I assume it will come with their new Video Engine ( as announced with VVC ) as the video IP only gets updated once every 2 years or so. Or they could choose to not support it and have those engineers working on different things. But I find that unlikely. And of course, roadmap changes. But all of these are inferring from public information.
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Previously iwod Last edited by ksec; 21st January 2022 at 21:44. |
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22nd January 2022, 02:16 | #635 | Link | |
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Plus they are highly reliant on VMAF tuning, and so have all the typical blind spots of VMAF, which tends to ignore banding and psychovisual adaptive quantization techniques. Whatever the codec, YouTube's quality has always been lower at a given bitrate. Which makes perfect sense given their business model. |
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22nd January 2022, 02:17 | #636 | Link | |
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27th January 2022, 10:46 | #640 | Link |
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For those who are interested in the current HEVC / Advanced Access patent fiasco.
http://www.fosspatents.com/2022/01/a...an-rename.html
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