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3rd June 2019, 19:22 | #1701 | Link |
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Deltaq is at superblock granularity, whereas "AQ" uses segment support which is down to 4x4 granularity. The two bitstream features are sorta redundant but their coding is optimized for different uses - Deltaq was designed for sub-frame rate targeting, and segments are more for mbtree/psy purposes.
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4th June 2019, 12:05 | #1702 | Link | |
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9th June 2019, 11:53 | #1707 | Link | |
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I find your comment extremely surprising considering your join date of 2006. I would expect such a comment from a newbie. Unless the entirety of the developer and encoding community are lying to me, what is occurring with AV1 is absolutely par the norm for new codecs. 265 is still a dog to encode without a reasonable monster of a PC. How will an even more compressed, newer codec, that's open (and therefore can't break terrible patents) begin to compete only 6 months in? The only thing that AV1 has going for it, is it's openness and the hope that /so many players/ throwing themselves at the problem, will slowly address the performance issues. None the less, it's been 6 months. You're not going to see this getting hardware acceleration for at least 6 more months on any devices. I suspect it'll be ubiquitous at best case scenario of 3 years. (more experienced members, welcome to correct me) |
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9th June 2019, 12:06 | #1708 | Link | |
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Yet here you are outlining exactly why it is very unlikely to and it kind of blows me away, you're totally correct. AV1 /at scale/ when a video is being watched upwards of 500 times a week, makes so much more sense. Those encode times will eventually pay for themselves. |
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9th June 2019, 13:06 | #1710 | Link |
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LAV Filters - open source ffmpeg based media splitter and decoders |
9th June 2019, 16:49 | #1711 | Link |
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nVidia and AMD (possibly Intel for Gen11 iGPUs) could add in drivers a hybrid decoding approach of AV1 using the GPU itself (shaders) but not ASIC yet.
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Win 10 x64 (19042.572) - Core i5-2400 - Radeon RX 470 (20.10.1) HEVC decoding benchmarks H.264 DXVA Benchmarks for all |
9th June 2019, 19:52 | #1712 | Link | |
Artem S. Tashkinov
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It's kinda strange we have projects like x264/x265 for patent encumbered H.264/H.265 codecs, yet nothing like that for VP9/AV1. Last edited by birdie; 9th June 2019 at 19:55. |
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9th June 2019, 21:35 | #1713 | Link |
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I believe that is the niche that rav1e is aiming for.
And if Apple adopts AV1 and it becomes ubiquitous then then I think it'll have been a good move for the focus to have shifted from VP9, even if it means VP9 becomes a bit of a lost generation. There's been some suggestion that SVT-AV1 has already passed libvpx for the "encode a single video on a single machine" case, while still having room to improve further. |
11th June 2019, 15:30 | #1714 | Link | |
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AV1 Ecosystem Update: May 2019
https://www.singhkays.com/blog/av1-e...date-may-2019/
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11th June 2019, 16:35 | #1715 | Link | |
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11th June 2019, 17:17 | #1716 | Link | ||||
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It's the user-generated content world where you see a visible quality ceiling. The sources aren't as good, and the economics for how many MIPS/pixel and how many Mbps to spend yield more conservative choice. Also there is a big political motivation to use of non-MPEG codecs by some of the biggest UGC platforms, even when it doesn't make strict economic sense. Quote:
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Also, the MPEG reference encoders just aren't useful for production due to speed and features. The vp* and AV1 series get a sort of hybrid reference/production encoder. It's "good enough" so people haven't bothered with ground-up new encoders. And specs haven't been close to MPEG quality before AV1. And we can't discount the unique impact of x264. Legions of video pirates competing on making the best looking files as small as possible as quickly as possible to post to torrent sites meant lots of eyeballs on a very wide range of source content; much more diverse than typical encoder test content libraries. Dozens of people deep diving on tunings instead of a handful. Lots of eyeballs on every new beta to see what's different. x264 just got good in ways that might be impossible to ever replicate. HEVC is close enough to H.264 that things like CRF and psychovisual tuning worked well enough to refine from. And x264 set a high bar that commercial encoder vendors had to strive to beat. VP9 never had that kind of interest. AV1 is certainly showing much more competition in commercial encoders already than any vp* codec ever did. |
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11th June 2019, 17:41 | #1717 | Link | |
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Its also as much of a successor to the Theora project, which also had On2 lineage stemming from VP3 being open sourced. For such a limited base codec, they managed to get a lot out of Theora (Ptalabvorm) before VP8 made it redundant for web video. x265 on the other hand was never truly a successor to x264 in terms of community from what I've seen - it was driven by MultiCoreWare from the get go, and controlled by them rather than community (don't quote me there). I'd also say rav1e is also kind of a test to see if a production codec can be viable if written in Rust, I think its the first? Last edited by soresu; 11th June 2019 at 17:49. |
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11th June 2019, 17:47 | #1718 | Link | |
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The fact that it doesn't belong to one singular company helps too I think (like AC3/AC4/DTS). For all the reach of Youtube, noone wants to suffer with their bottom line because Google decided to make a change in codecs. I think even H264 and H265 would not have prevailed so well without a similar development process - albeit one more encumbered with patent jockeying and so forth. |
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12th June 2019, 02:54 | #1719 | Link | |
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While I'd love to see this become the "next x264," I'm not going to hold my breath. Far too many of the best encoders now are not free and especially not open source. |
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12th June 2019, 10:50 | #1720 | Link |
Artem S. Tashkinov
Join Date: Dec 2006
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Weird results from BBC: https://www.bbc.co.uk/rd/blog/2019-0...ssing-hevc-vvc: no source videos, no codecs version, nothing.
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