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Old 9th April 2020, 22:01   #61  |  Link
hajj_3
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The windows 10 av1 extension decoder now uses the dav1d decoder! An update was just released on the microsoft store.

Last edited by hajj_3; 9th April 2020 at 23:30.
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Old 9th April 2020, 23:29   #62  |  Link
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vlc player 3.0.9.2 is out, the first update in 8 months. Pretty sure it includes the latest dav1d decoder.
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Old 10th April 2020, 00:30   #63  |  Link
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Originally Posted by hajj_3 View Post
The windows 10 av1 extension decoder now uses the dav1d decoder! An update was just released on the microsoft store.
Is this an extra download or does Win10 comes with this AV1 extension decoder ?

If it is an extra download, any url ?
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Old 10th April 2020, 07:45   #64  |  Link
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The windows 10 av1 extension decoder now uses the dav1d decoder! An update was just released on the microsoft store.
Thanks !!
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Old 7th May 2020, 09:43   #65  |  Link
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MPC-BE v1.5.5 (build 5274) beta has been released, the first non-nightly release in 5 months. It includes dav1d git-0.6.0-80-g114e8f0 and ffmpeg git-n4.3-dev-2815-gda44bbefaa.

Last edited by hajj_3; 8th May 2020 at 09:33.
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Old 13th May 2020, 07:47   #66  |  Link
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New builds in MABS will delay a bit: meson has some issues with GCC 10.1 and posix_memalign as reported for dav1d. MSYS2 update pending.
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Old 16th May 2020, 10:23   #67  |  Link
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New builds in MABS will delay a bit: meson has some issues with GCC 10.1 and posix_memalign as reported for dav1d. MSYS2 update pending.
Your build is the last implementation dor VPx?
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Old 20th May 2020, 18:01   #68  |  Link
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dav1d accelerated AV1 decoder

dav1d 0.7.0 'Frigatebird' the fast and lean AV1 decoder

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This is a major update of the dav1d, the fast and lean AV1 decoder, codename 'Frigatebird'.

This release improves, once again, the speed on all platforms.

A rewrite of refmv made an important speed boost on x86 while reducing RAM usage. It should improve the speed on every platform.

A large number of assembly optimizations went for ARM64 for 8/10/12bit, a few for x86, notably for film grain and AVX-512 optimizations for CDEF.
And from the changelog:

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Changes for 0.7.0 'Frigatebird':
------------------------------

0.7.0 is a major release for dav1d:
- Faster refmv implementation gaining up to 12% speed while -25% of RAM (Single Thread)
- 10b/12b ARM64 optimizations are mostly complete:
- ipred (paeth, smooth, dc, pal, filter, cfl)
- itxfm (only 10b)
- AVX2/SSSE3 for non-4:2:0 film grain and for mc.resize
- AVX2 for cfl4:4:4
- AVX-512 CDEF filter
- ARM64 8b improvements for cfl_ac and itxfm
- ARM64 implementation for emu_edge in 8b/10b/12b
- ARM32 implementation for emu_edge in 8b
- Improvements on the dav1dplay utility player to support 10 bit,
non-4:2:0 pixel formats and film grain on the GPU
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Old 20th May 2020, 18:57   #69  |  Link
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Timed with the dav1d 0.7.0 release, I just ran a multi-threaded performance comparison of libgav1 and dav1d on the 8-bit and 10-bit Chimera encodes (which are at roughly equivalent rate):

https://docs.google.com/spreadsheets...htcqj1_4js9jSo
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Old 21st May 2020, 22:37   #70  |  Link
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Exciting progress! And one of the first practical uses of AVX-512 in the video world (x265 supports it, but with current Intel thermal throttling, it rarely turns into any real world perf improvement).

I'd be curious to see the pref delta between an AVX-512 and an AVX2-only build.
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Old 22nd May 2020, 00:48   #71  |  Link
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Exciting progress! And one of the first practical uses of AVX-512 in the video world (x265 supports it, but with current Intel thermal throttling, it rarely turns into any real world perf improvement).

I'd be curious to see the pref delta between an AVX-512 and an AVX2-only build.
It targets different CPUs. x265 targets skylake. dav1d targets icelake. [edit] I should clarify here that this is because - as @benwaggoner already pointed out - we expect avx512 would not ever be faster on skylake compared with avx2.[/edit] Performance (avx512 vs. avx2 on icelake) is slightly faster multi-threaded, and slightly slower single-threaded, more detailed notes will follow when it's more complete. Because we don't have consistently faster results yet, avx512 is currently disabled by default, and you need to specify --cpumask=avx512icl to enable it.

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Old 22nd May 2020, 08:00   #72  |  Link
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http://www.jbkempf.com/blog/post/202...0-mobile-focus
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Old 27th November 2020, 22:13   #73  |  Link
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DAV1D v0.8.0 changelog:

- Improve the performance by using a picture buffer pool; The improvements can reach 10% on some cases on Windows.
- Support for Apple ARM Silicon
- ARM32 optimizations for 8bit bitdepth for ipred paeth, smooth, cfl
- ARM32 optimizations for 10/12/16bit bitdepth for mc_avg/mask/w_avg, put/prep 8tap/bilin, wiener and CDEF filters
- ARM64 optimizations for cfl_ac 444 for all bitdepths
- x86 optimizations for MC 8-tap, mc_scaled in AVX2
- x86 optimizations for CDEF in SSE and {put/prep}_{8tap/bilin} in SSSE3
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Old 29th November 2020, 05:40   #74  |  Link
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Great strides for ARM32 playback in dav1d 0.8 which will benefit most streamers on the market which are limited to ARM32 OS's by their RAM capacity, at this point the ARM64 code path is almost completely optimised save for film grain.

Still outstanding though is 10+ bpc SIMD code for AVX2 and SSSE3, which seems a bit silly now after Netflix started churning out 10 bit HDR AV1 content earlier in the year.
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Old 2nd December 2020, 02:51   #75  |  Link
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Great strides for ARM32 playback in dav1d 0.8 which will benefit most streamers on the market which are limited to ARM32 OS's by their RAM capacity, at this point the ARM64 code path is almost completely optimised save for film grain.

Still outstanding though is 10+ bpc SIMD code for AVX2 and SSSE3, which seems a bit silly now after Netflix started churning out 10 bit HDR AV1 content earlier in the year.
Are they using it for PC/Mac playback, though? Netflix is going to have some HW DRM requirements from their content licensors.
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Old 3rd December 2020, 11:21   #76  |  Link
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888 will able to decode 4K 8bit 30fps AV1 in software just fine though battery life will be hugely affected.
There's no reason that 10 bit 4K should be a problem at this point with the level of asm/SIMD optimisation for NEON that has been achieved in dav1d already from ARM64, which is basically everything but film grain and one other feature of the codec.

Even ARM32 is closing the gap to the ARM64 now.

There is also the GPU work in the Xbox One decoder which may well be translatable to GLES/Vulkan and Android* - though it should probably work fine for Windows on ARM with little changes, given it is UWP and DX12 code.

*There is already some GPU decoding work done in dav1d and the AOM Xbox One decoder branch may provide some pointers/reference for future work filling in the remaining gaps - though I doubt that it will dramatically affect decoding speed, probably more battery life, but that is what they would be after anyways for mobile use cases.
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Old 3rd December 2020, 19:23   #77  |  Link
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Are they using it for PC/Mac playback, though? Netflix is going to have some HW DRM requirements from their content licensors.
True, though production problems of this year aside they have been steadily transitioning to their own content above anything else on the platform.

AMD and nVidia are also starting to push AV1 decoding hardware into the PC platform with RX 6000 and RTX 3000.

I'm not sure if those ASIC in GPU solutions will be compatible with DRM requirements but its certainly a start - there's also the new Intel SoC's coming that will decode and even encode AV1 in hardware.

Last edited by soresu; 3rd December 2020 at 19:27.
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Old 3rd December 2020, 23:53   #78  |  Link
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Good thread!

I'm curious if anyone has deep dived on the decoder performance benefits of using more tiles, relative to the number of available threads to decode on.
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Old 3rd December 2020, 23:57   #79  |  Link
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True, though production problems of this year aside they have been steadily transitioning to their own content above anything else on the platform.
Yeah. Although they still need to support full studio-approved DRM if they have any licensed content. I suppose they could use AV1 only on a subset of the library.

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AMD and nVidia are also starting to push AV1 decoding hardware into the PC platform with RX 6000 and RTX 3000.
Also Intel Xe/11th Gen Core! Which is the only thing that seems to be shipping in material volume so far.

Quote:
I'm not sure if those ASIC in GPU solutions will be compatible with DRM requirements but its certainly a start - there's also the new Intel SoC's coming that will decode and even encode AV1 in hardware.
All the GPU solutions are absolutely supposed to support HW DRM playback. Windows has had good hooks for leveraging that for many years now.

I've not heard of anyone actually doing adaptive bitrate AV1 with DRM targeting actual consumer HW decode yet, though. Lots of talk about it, but I've not been able to find a single demo package or web site anywhere.
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Old 9th December 2020, 18:29   #80  |  Link
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Yeah. Although they still need to support full studio-approved DRM if they have any licensed content. I suppose they could use AV1 only on a subset of the library.
I think this is a standard part of their rollout. I seem to recall VP9 being used first for downloadable content, which was often their in-house stuff.
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