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20th May 2018, 00:06 | #681 | Link |
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Luckily encoders can choose to not use some feature if its deemed too slow, especially since 8-pel is optional anyway and has to be signaled in the frame header.
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LAV Filters - open source ffmpeg based media splitter and decoders |
22nd May 2018, 23:31 | #684 | Link | |
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It's also a relatively cheap feature to add - the subpel filters are already pretty large, so it's just adding another set of taps. |
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31st May 2018, 15:44 | #685 | Link | |
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9th June 2018, 11:06 | #689 | Link |
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"The new V76 is essentially the successor to Arm’s previous high-end video block, the Mali-V61, which was announced back in 2016. Understandably the world of video encoding and decoding doesn’t evolve at quite as brisk a pace as GPUs, so Arm generally only revises their video blocks at about half the frequency. ... this processor will not include any support for the upcoming AV1 codec. While the bitstream specification for the eagerly anticipated codec was released a couple of months back, the timing was unfortunately after Arm had already completed the V76 RTL (never mind the fact that the specification isn’t closed yet). So it’s going to have to be the next video block after the V76 before Arm can include AV1 decode support. ... The very high encoding requirements of AV1 also mean that even after a decoder ships in a phone, we’re unlikely to see a full-featured encoder in a phone any time soon."
https://www.anandtech.com/show/12835...k-video-future |
9th June 2018, 11:11 | #690 | Link |
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Its fascinating how the PR stunt from AOM managed to mislead everyone into thinking the bitstream is actually done. And months later, its still not actually done!
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LAV Filters - open source ffmpeg based media splitter and decoders |
10th June 2018, 23:02 | #691 | Link |
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I guess it's still "wait and see".
I'm still not sure why I'd use AV1 as an OTT operator delivering 4k content. I have to make HEVC for everything that exists today. Even if AV1 ends up being a bit more efficient (and this comes down to encoder implementation) it will still cost me a huge amount of money to encode my library in both formats, so why would I? I guess it all depends on what clients end up supporting it. |
11th June 2018, 09:00 | #692 | Link |
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Socionext Implements AV1 Encoder on FPGA over Cloud Service
http://socionextus.com/pressreleases...cloud-service/ |
11th June 2018, 10:27 | #693 | Link |
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AOM v0.1.0-9742-g4e7b6f08f
Somewhat related to AV1: Google would like to patent (r)ANS, a speed optimized kind of Arithmetic Coding, specifically for its use in a video codec – despite Jarek Duda (its main inventor) having released this algorithm already to Public Domain in 2014... |
11th June 2018, 19:35 | #694 | Link | |||
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Anyway I really hate this licensing terms and price discovery period. It has happened with AVC, and it is happening again with HEVC. The group or their members want to extract maximum outrageous prices, and waited for years of failure in market before they relent. I sometimes wonder if there are any more thing we could do with AVC to further improve it as an baseline. |
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12th June 2018, 22:30 | #695 | Link | |
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codec_value=decoder_penetration * quality_@_perf advantage So AV1's success is driven by decoder_penetration and quality_@_perf. The latter is important; 15% better at 10x encoding time doesn't really count unless encoding time was already more than fast enough. When live encoding is needed, or if encoding compute is a limit, MIPS/pixel is the limiting factor, and so AV1 implementations will compete with H.264, VP9, and HEVC at the same MIPS/pixel. If devices wind up providing just H.264 and AV1, than the decision driver is whether the added compute, storage cost, and cache dilution is worth it. Even if compute was free, at a large scale supporting another codec is a huge operational expense and system complexity increase. |
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12th June 2018, 22:58 | #696 | Link | |
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Tons of SmartTV and STB-like devices have way less CPU than a typical phone, so software decoding at 2160p is a non-starter. And replacement cycles are way slower for TVs and STBs than for phones and tablets. Even if AV1 is an incredible success, companies would still have to deliver HEVC for legacy living room devices in 2025+. Heck, they will still have to deliver H.264 in 2025 for a number of device categories. Personal computers and phones/tablets are by far the easiest markets for fast integration of new codec support. And lots of enterprises were still doing corporate content in WMV/VC-1 until they'd deprecated XP and Vista. Massively improved technologies get the market moving, but even the best improvements can take a long time to become universally available in many markets. |
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13th June 2018, 00:58 | #697 | Link |
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So your claim is that Netflix will cut off the 10s of millions (though probably actually more) of devices that are already streaming 4K HEVC from their service? Yeah, right... People are not going to buy a new TV or STB because of some silly codec war.
Last edited by amichaelt; 13th June 2018 at 01:00. |
13th June 2018, 02:49 | #698 | Link |
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It's not like VP9 isn't supported by any smart TVs.
I have bought 1,5 years ago LG smartTV. This year after upgrading the Youtube aplication it starts to support VP9 (stats for nerds reports it) and plays Youtube 4K without single drop. |
13th June 2018, 07:03 | #699 | Link | |
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13th June 2018, 07:08 | #700 | Link | |
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Yes, The point is, HEVC is already included in most TV or STB. I wish we don't have the same problem with VVC. Last edited by iwod; 13th June 2018 at 07:13. |
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