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5th November 2019, 09:40 | #1921 | Link |
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Comparisons between LAV 0.74.1 and later nightly versions are flawed since the threading strategy changed in FFmpeg, which resulted in 0.74.1 using more frame threads then the later nightlies, making 0.74.1 artificially faster. As such, all your results are invalidated.
This is why you should use as little software as possible to do benchmarking (ie. go as close to the core as possible), as you never know what changes might interfer with your conclusions. I've also once again changed the thread distribution in 0.74.1-30 from last night, and while its going to use more threads again now, similar to the old logic, its not going to be identical to 0.74.1 in all cases (because I added more tile threads on high core-count CPUs)
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LAV Filters - open source ffmpeg based media splitter and decoders Last edited by nevcairiel; 5th November 2019 at 09:48. |
7th November 2019, 23:56 | #1922 | Link |
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AOMedia Research Symposium 2019 Videos
https://www.youtube.com/playlist?lis...wewtWKpxXky8iI |
8th November 2019, 14:49 | #1923 | Link |
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There are only two I can think of
Seriously the only area where it might be a tiny bit better is for ultra-high compression where it does not start falling apart as badly as jpeg, for any sane (mid ot high) image quality range the vast array of jpeg encoders are doing a significantly better job of retaining detail |
8th November 2019, 20:04 | #1924 | Link |
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Webp had some other benefits over JPEG outside of compressing photographic images.
JPEG XL seems like WebP's successor in this regard. It's targeted at lots of pain points that would make it a good choice to replace JPEG (and PNG and GiF) on the web and in the browser even if it didn't beat JPEG on compression, though it claims that as well. And maybe the JPEG name will help, though that doesn't seem to have benefitted anyone but the original JPEG. Not sure there's room for AVIF and JPEG XL but maybe they have subtly different niches. |
8th November 2019, 20:09 | #1925 | Link |
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Ronald's slide showing 4 AV1 encoders all scaling well seems like an improvement from his slide at BIG Apple Video where only SVT seemed to be managing that, with Eve just behind and Rav1e and libaom trailing.
Not sure it it's a direct comparison to the earlier slide but if it is then things should be a lot better for AV1 when cores are available. |
9th November 2019, 01:38 | #1926 | Link | |
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Hopefully a lesson learned for AV2 efforts going forward. |
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9th November 2019, 15:49 | #1927 | Link |
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Rav1e release 0.1.0
First official release, published during the Video Dev Days 2019 in Tokyo. Features
https://github.com/xiph/rav1e/releases/tag/0.1.0 Last edited by marcomsousa; 9th November 2019 at 16:17. |
9th November 2019, 19:20 | #1930 | Link |
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Thanks. Well, I guess I won't be coming across many then. I don't watch stuff like that, and it looks like a few million views are far from enough. A 4+ billion Ed Sheeran song had it up to to 2160p, but a 2+ billion Taylor swift song only has it up to 720p. I managed to find some Wired videos with a couple million views, that have AV1 though.
It seems like Firefox's (well, Waterfox's to be accurate) AV1 decoding is quite poor. MPV's (after upgrading) and LAV's seem to be a lot better, no hangs or stutter. |
10th November 2019, 09:29 | #1931 | Link |
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HandBrake 1.3.0 Released
* Added support for reading AV1 via libdav1d https://github.com/HandBrake/HandBrake/releases |
10th November 2019, 16:25 | #1932 | Link | |
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So it's possible that YouTube is measuring the bitrate/resolution of these views and prioritising the ones that are viewed at high quality, not just the ones that are viewed a lot. Just a guess though. |
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11th November 2019, 07:58 | #1933 | Link |
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The superblock boundary one to get superblock-row multithreading (an encoder-side-only version of partitions in vp8 or wavefront in hevc) is quite micro, because it is easily worked around by just ignoring the superblock edge's correctness and sacrifice your search' accuracy a tiny little bit. The frame multi-threading one is a bigger deal.
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11th November 2019, 22:50 | #1934 | Link | |
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19th November 2019, 08:25 | #1937 | Link | |
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On the other hand the likes of Amlogic have plans to have AV1 in lower end chips for 2020, so you appear to be wrong on both counts. |
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19th November 2019, 18:18 | #1938 | Link | |
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There is a lot of untapped potential in using how the game is rendered to drive encoder optimization that could help here (the game knows your motion vectors!). Not sure if anyone's researching that with AV1 currently. |
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19th November 2019, 18:55 | #1939 | Link | |
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Living room has a lot more breathing room for power consumption, thermal management, and thus process. The mobile chips are where every extra transistor costs the most. Of course, having a working HW decoder at all is a huge milestone, even if it might take a bit for those to migrate into mobile SoCs. |
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20th November 2019, 03:47 | #1940 | Link | |
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i wouldn't wait for them to announce a hardware decoder they may just add them or evne ship them already without a word and without any way to access them.
as an example the "first" nvidia card with an HEVC main10 decoder was the 960 this card has a VP9 profile 0 decoder too it was not possible to access it for about a year or so. the 960 was release in 22.01.2015 VP9 was finalised 17.06.2013 that's just 17 months i dare to say that AV1 has far more attraction then VP9 AV1 is 19 month old so if someone really wanted to they could have added it and it wouldn't be the first time they made it public which may sound odd at first but if it can't be used anyway it may just be a better this way. Quote:
this only counts for lookahead which should be completely avoided if possible. and how would you even access these information from the game in the first place. |
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