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Old 20th November 2019, 13:16   #1941  |  Link
soresu
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Originally Posted by benwaggoner View Post
So far, all the announced AV1 chips have been for living room devices, and nothing for mobile, correct?
He was talking Stadia which uses a Chromecast in its founder bundle - that is a living room/wall powered device.
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Old 20th November 2019, 15:26   #1942  |  Link
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stadia "works" with pretty much every device. you don't need a chromecast a phone can do it so can a web browser on the PC. there is missing support for iOS and such but what ever.
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Old 20th November 2019, 16:24   #1943  |  Link
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New RAV1E build out with big performance improvements when using tiling: https://github.com/xiph/rav1e/releases/tag/20191120
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Old 20th November 2019, 21:35   #1944  |  Link
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i don't even see any use case for stadia and AV1 now.
even if the end device is able to decode it you still have to real time low latency encode it which is just not possible at 4K60 UHD.
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Old 22nd November 2019, 17:20   #1945  |  Link
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Visionular AV1 encoder AURORA demo video
http://35.185.250.137:8080/#
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Old 23rd November 2019, 19:10   #1946  |  Link
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Isn't it "Tears of Steel"?
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MediaFire: x264 | x265 | VPx | AOM | Xvid
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Old 23rd November 2019, 19:41   #1947  |  Link
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Originally Posted by huhn View Post
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.


using multiply frames for encoding is a very bad thing in this case because latency is very important in this task there is a reason the currently released stadia is at best a very poor joke they want money for.

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.
So will the GPUs releasing next year from Nvidia and AMD probably decode AV1?
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Old 23rd November 2019, 20:10   #1948  |  Link
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Originally Posted by Adonisds View Post
So will the GPUs releasing next year from Nvidia and AMD probably decode AV1?
AMD has historically been very slow adopting new codecs, while NVIDIA has usually pushed it decently fast. But any speculation is just that.
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Old 23rd November 2019, 20:53   #1949  |  Link
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AV1 has a major problem i forgot.
they changed the bit stream about 10 month ago. i don't have detail if thsi affects decoding but as far as i understand yes it did back then.

maybe AMD cares more now since they are now entering the mobile market. taking recent development crashing with hardware decoding and the lying with polaris into account it will be intel or nvidia first.

it's just speculation anyway.
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Old 23rd November 2019, 23:47   #1950  |  Link
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Originally Posted by huhn View Post
AV1 has a major problem i forgot.
they changed the bit stream about 10 month ago. i don't have detail if thsi affects decoding

It does not. The errata-1 is exactly that, an errata to clarify some bitstream (mostly level) constraints. Actual decoding is not affected, it is just intended to simplify worst-case for hardware design.

Actual non-cosmetic changes that I am aware of in the errata1:
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Old 25th November 2019, 16:09   #1951  |  Link
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SVT-AV1 v0.7.5
https://github.com/OpenVisualCloud/S...ses/tag/v0.7.5
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- RDOQ for 10-bit
- Inter Intra Class pruning at MD-Staging
- Global Motion Vector support for 8-bit and 10-bit
- Interpolation Filter Search support for 10-bit
- Palette Prediction support
- 2-pass encoding support
- ATB 10-bit support at the encode pass
- Simplified MD Staging [only 3 stages]
- Inter-Inter and Inter-Intra Compound for 10-bit
- Intra Paeth for 10-bit
- Filter Intra Prediction
- New-Near and Near-New support
- OBMC Support for 8-bit and 10-bit
- RDOQ Chroma
- ATB Support for Inter Blocks
- Temporal Filtering for 10-bit
- Eight-pel support in predictive ME
- MCTS Tiles support
- Added AVX512 Optimizations
- Added AVX2 Optimizations
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Old 26th November 2019, 02:30   #1952  |  Link
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As usual, a new version of SVT-AV1 is released just in time for Phoenix to benchmark the previous 0.7 version on the new i9-10980XE and Threadripper 3960X and 3970X. (they unfortunately didn't have a Ryzen 3950X to benchmark)

https://www.phoronix.com/scan.php?pa...0x-3970x&num=8

Also included are benchmarks of rav1e v0.1 (1080p), dav1d v0.5.0 (1080p, 4k, and 10bit 1080p).


AV1 performance-per-watt charts can be found on this page (scroll down):
https://www.phoronix.com/scan.php?pa...x-3970x&num=12

...and AV1 performance-per-dollar charts can be found on this page (also scroll down):
https://www.phoronix.com/scan.php?pa...x-3970x&num=13
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Old 26th November 2019, 12:55   #1953  |  Link
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https://www.mediatek.com/products/sm...dimensity-1000
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MediaTek Dimensity 1000

We’re redefining the flagship smartphone experience with MediaTek Dimensity mobile series. MediaTek's technological and product leadership is exhibited in our new series of 5G-integrated SoC’s (system on chip) designed for premium-to-flagship smartphones.

Through the clever combination of the most powerful and innovative technologies in a leading design, this tiny 7nm chip is the new era of mobility, where everyone, and everything is seamlessly connected.

With MediaTek Dimensity, Expect Incredible.
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Blur-busting displays, fast 4K multimedia & AV1 decoding

HFR (high frame rate) displays are not just an essential feature for gamers to attack the action, but they’re also beneficial to the everyday experience with notably smoother scrolling of webpages and animations in apps. The MediaTek Dimensity 1000 brings this supreme sensation to smartphones with FullHD+ displays up to 120Hz and 2K+ up to 90Hz.

In addition to enabling hardware video encoding and decoding at 4K 60FPS, the MediaTek Dimensity 1000 is the world’s 1st mobile SoC with AV1 format support: the latest and most advanced video streaming technology supported by major global technology and content makers, helping to enable new levels of visual detail, crisper sound and higher resolutions in the latest wave of streaming media.
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Old 26th November 2019, 12:57   #1954  |  Link
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The Mediatek Dimensity 1000 chip can hardware decode 4k 60fps AV1, it can't encode in AV1 in case anyone was wondering. Still fantastic news though
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Old 27th November 2019, 19:03   #1955  |  Link
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Originally Posted by hajj_3 View Post
The Mediatek Dimensity 1000 chip can hardware decode 4k 60fps AV1, it can't encode in AV1 in case anyone was wondering. Still fantastic news though
Encoder ASICs usually take longer to appear if memory serves, I certainly remember HEVC decoders came before encoders in mobile.
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Old 29th November 2019, 17:11   #1956  |  Link
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Originally Posted by hajj_3 View Post
The Mediatek Dimensity 1000 chip can hardware decode 4k 60fps AV1, it can't encode in AV1 in case anyone was wondering. Still fantastic news though
These 4k60 hardware decoders, are they only capable of decoding 1/4 of that in HDR mode?
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Old 30th November 2019, 00:46   #1957  |  Link
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Why would that be the case? The decoder doesn't have to work any harder to decode HDR (assuming you're already doing 10 bit, which you should be).
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Old 30th November 2019, 00:54   #1958  |  Link
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Why would that be the case? The decoder doesn't have to work any harder to decode HDR (assuming you're already doing 10 bit, which you should be).
Perhaps he means tone mapping for displaying HDR content on SDR screens?
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Old 30th November 2019, 01:47   #1959  |  Link
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Phononix benchmarked the performance of Windows 10 vs Linux in both rav1e v0.1 and SVT-AV1 v0.7 on a Threadripper 3970X: https://www.phoronix.com/scan.php?pa...ws-linux&num=5
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Old 30th November 2019, 01:56   #1960  |  Link
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Originally Posted by Blue_MiSfit View Post
Why would that be the case? The decoder doesn't have to work any harder to decode HDR (assuming you're already doing 10 bit, which you should be).
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Perhaps he means tone mapping for displaying HDR content on SDR screens?
No, I'm assuming SDR is done with 8 bits and HDR with 10. Why do you assume people would use 10 bit for SDR? Youtube currently uses 8 bits for SDR AV1.

I'm also assuming that these decoders advertised as 4k60 capable are only capable of that in 8 bits. I would a bit surprised if that was not the case.

So possibly they are not really ready for HDR content. And since AV1 is a codec for a time in the future when HDR could be common, that is dissapointing. I would think that since Netflix is pushing hard for it, at least 10bit 4k24 would be supported.
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