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Old 2nd October 2023, 15:49   #2541  |  Link
Boulder
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Question regarding --chroma sample position: is it 2 for HDR?

Description of the parameter in the help text: "The chroma sample position when chroma 4:2:0 is signaled: unknown, vertical, colocated"
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Old 4th October 2023, 18:45   #2542  |  Link
benwaggoner
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Quote:
Originally Posted by Boulder View Post
Question regarding --chroma sample position: is it 2 for HDR?

Description of the parameter in the help text: "The chroma sample position when chroma 4:2:0 is signaled: unknown, vertical, colocated"
It is 2 for UHD HDR Blu-ray. Although I'm skeptical that end-to-end support is reliably implemented; a number of devices ignore the metadata and assume it is 0 like everything was forever. At 2160p getting it wrong is nigh invisible. I do worry about a 360p OTT HDR stream, though, as a half pixel is a 720p pixel.
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Old 8th December 2023, 12:18   #2543  |  Link
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libaom 3.8.0 was released:

Quote:
2023-11-30 v3.8.0
This release includes new codec interfaces, compression efficiency and
perceptual improvements, speedup and memory optimizations and many bug
fixes. This release is ABI compatible with the last release.
- New Features
* New codec controls:
* AV1E_SET_MAX_CONSEC_FRAME_DROP_CBR: Set the maximum number of
consecutive frame drops allowed for the frame dropper in 1 pass
CBR mode.
* Run-time CPU feature detection for all Arm platforms:
CRC, DotProd, I8MM and SVE CPU feature presence is detected at run
time and code paths making use of these features are selected
dynamically. These code paths provide meaningful performance gains
for standard bitdepth RTC and VoD encoding: up to 10% and 20%
respectively, over the Armv8.0-A baseline build.
* RTC: Frame-dropper support added to the rate control library.
* RTC Rate control improvements for low bitrate and for SVC.
- Compression Efficiency Improvements
* Improved accuracy of cost estimation for loop restoration and
global motion.
* Improved selection of loop restoration unit size - full search up
to (non-realtime) speed 2, retuned static selection at higher
speeds.
* RTC Screen content mode: 3-5% bdrate gains across speeds 7 - 10.
* Good-quality mode: 0.2 - 0.5% bdrate gains across speeds 1 - 4.
- Perceptual Quality Improvements
* RTC Screen: Improved visual quality for scrolling.
* RTC: Improved color quality for both screen and video mode.
- Speedup and Memory Optimizations
* Good-quality, single-thread encoder speedups:
o 15% improvement for speed 5.
o 12% improvement for speed 6.
* Arm standard bitdepth VoD (--good):
o 8% speedup for speeds 0 and 1.
o 20% speedup for speed 2.
o 27% speedup for speed 3.
o 30% speedup for speed 4.
o 38% speedup for speeds 5 and 6.
* Arm high bitdepth VoD (--good):
o 206% speedup for speeds 0 and 1.
o 180% speedup for speed 2.
o 51% speedup for speeds 3 and 4.
o 68% speedup for speed 5.
o 72% speedup for speed 6.
* RTC Screen content: 2-6% speedup across speeds 7-10.
* RTC: 2-3% speedup for temporal layers.
* RTC: Speedups to reference scaling in nonrd pickmode.
* Good-quality mode: Simplified global motion estimation, saving
~1200 lines of code and 1KB of tables while improving quality.
- Bug Fixes
* Fixes to improve libaom stability in case of memory allocation
failures.
* Fixes to SIMD functions (x86 AVX2/SSE2 and ARM Neon).
* b/310457427, b/310766628: Bug fixes to only use rec_sse in CBR
mode.

Last edited by oibaf; 8th December 2023 at 14:23.
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Old 8th December 2023, 14:21   #2544  |  Link
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Also, post 3.8.0: https://aomedia.googlesource.com/aom...b898add3dca65b

Quote:
rtc: Speed 11 for video mode, for resoln < 720p.

This is a very aggressive fast speed setting for
video in real-time mode (RTC).

-force single reference
-aggressive cdef skip
-selective cdf_update
-turn off motion interpolation filter search
-use only DC for intra-modes
-increase thresholds for source_sad and transform
skipping test
-faster partitioning - fixed per superblock

bdrate and IC change from speed 10 rtc_derf:
~29% IC speedup and ~26% bdrate loss

To be tuned/adjusted further.
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Old 13th December 2023, 13:02   #2545  |  Link
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SVT-AV1 1.8.0 was released:

Quote:
[1.8.0] - 2023-12-11

Encoder
  • Improve the tradeoffs for the random access mode across presets:
  • Speedup CRF presets M6 to M0 by 17-53% while maintaining similar quality levels
  • Re-adjust CRF presets M7 to M13 for better quality with BD-rate gains ranging from 1-4%
  • Improve the quality and speed of the 1-pass VBR mode
  • Improve Multi Pass VBR algorithm for better quality with BD-rate gains of ~3% on average
  • More details on the per preset improvements can be found in MR !2143
  • Add API allowing to update bitrate / CRF and Key_frame placement during the encoding session for CBR lowdelay mode and CRF Random Access mode
  • ARM Neon SIMD optimizations for most critical kernels allowing for a 4.5-8x fps speedup vs the c implementation
Cleanup and bug fixes and documentation
  • Various cleanups and functional bug fixes
  • Update the documentation for preset options and individual features
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Old 14th December 2023, 18:34   #2546  |  Link
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https://www.intel.com/content/www/us...ng-news-1.html

Intel Core Ultra Meteor Lake officially launched, Intel's first processor family with AV1 hardware encoder.
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Old 16th December 2023, 18:37   #2547  |  Link
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Quote:
Originally Posted by GTPVHD View Post
https://www.intel.com/content/www/us...ng-news-1.html

Intel Core Ultra Meteor Lake officially launched, Intel's first processor family with AV1 hardware encoder.

Here a comparison to Phoenix: https://youtu.be/4sQMR3cQtCU?t=690
Attachments Pending Approval
File Type: jpg AV1.jpg
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Old 19th December 2023, 17:38   #2548  |  Link
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mozilla has removed AV1 support from firefox 121 on windows and now requires you to install the Microsoft AV1 Video Extension from microsoft store instead: https://www.mozilla.org/en-US/firefo.../releasenotes/

This is likely due to avanci demanding royalties from AV1 streaming.
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Old 19th December 2023, 17:54   #2549  |  Link
birdie
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Quote:
Originally Posted by hajj_3 View Post
mozilla has removed AV1 support from firefox 121 on windows and now requires you to install the Microsoft AV1 Video Extension from microsoft store instead: https://www.mozilla.org/en-US/firefo.../releasenotes/

This is likely due to avanci demanding royalties from AV1 streaming.
They didn't remove anything.

AV1 software decoding is still there. The extension is required for HW decoding. Windows LTSC doesn't have the extension installed by default and millions of people use this version of Windows because it's the version to use. Unfortunately MS for some reasons decided not to include HW video decoding with this Windows SKU.
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Old 20th December 2023, 00:22   #2550  |  Link
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Microsoft Edge 121 Beta has enabled AVIF decoding support by default.
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Old 26th January 2024, 11:27   #2551  |  Link
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Microsoft Edge 121 has just been released. av1 and avif now work by default.
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Old 24th February 2024, 18:02   #2552  |  Link
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AOM AV1 v3.8.1-290-g0414f4e9ab
Built on February 24, 2024, GCC 13.2.0

https://aomedia.googlesource.com/aom


DL :
https://www.mediafire.com/file/5qhcvuaz26w4h9g
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Old 1st March 2024, 22:09   #2553  |  Link
LigH
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New uploads: (MSYS2; MinGW32 / MinGW64: GCC 13.2.0)

AOM v3.8.1-302-g14010c6f0f

rav1e 0.7.0 p20240227-g5eaae62e

dav1d 1.4.0-67-g85a1035

SVT-AV1 v1.8.0-43-g2bd950a9

avif 1.0.4-8db5d51
dav1d [dec]:1.4.0-67-g85a1035, aom [enc/dec]:3.8.1-302-g14010c6f0f, rav1e [enc]:0.7.0 (p20240227)
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Old 21st May 2024, 18:59   #2554  |  Link
LigH
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It seems to me that avifenc may support SVT-AV1 as one of several encoders. A recent build v1.0.4 does contain strings with related messages. But I doubt it contains code, and the help output doesn't mention it either. Does anyone know facts?

PS: The repo readme suggests that it has to be enabled in CMake options... maybe M-AB-S can do that for the 64-bit version.

PPS: Well, that was simple.
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Last edited by LigH; 21st May 2024 at 21:06.
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Old 21st May 2024, 21:17   #2555  |  Link
LigH
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New uploads: (MSYS2; MinGW32 / MinGW64: GCC 14.1.0)

AOM v3.9.0-146-g4637f5d7

rav1e 0.7.0 p20240423-1-g1c4fcd8

dav1d 1.4.1-66-g3623543

SVT-AV1 v2.1.0-bbcff78

avif 1.0.4-99c288a
Version: 1.0.4 (dav1d [dec]:1.4.1-66-g3623543, aom [enc/dec]:3.9.0-146-g4637f5d7, rav1e [enc]:0.7.0 (p20240423-1-g1c4fcd8), svt [enc]:v2.1.0)
libyuv : available (1887)

Note: SVT-AV1 encoder in avifenc only available in 64-bit build
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