[Cin] libaom 3.2.0
phylsmith2017 at gmail.com
Tue Oct 26 17:43:28 CEST 2021
Andrew, thanks so much for keeping up on new releases (including HV which I
have already downloaded).
When I boot ubuntu 16 to create the 10/31 release, I will take time to test
libaom update and hopefully check that in in November.
I do not plan on upgrading for the dot release of ffmpeg -- that is 4.4.1
-- not worth the hassle. OK?
On Tue, Oct 26, 2021 at 3:52 AM Andrew Randrianasulu via Cin <
cin at lists.cinelerra-gg.org> wrote:
> This release includes compression efficiency and perceptual quality
> improvements, speedup and memory optimizations, as well as some new
> - New Features
> * Introduced speeds 7, 8, and 9 for all intra mode.
> * Introduced speed 10 for real time mode.
> * Introduced an API that allows external partition decisions.
> * SVC: added support for compound prediction.
> * SVC: added support for fixed SVC modes.
> - Compression Efficiency Improvements
> * Intra-mode search improvement.
> * Improved real time (RT) mode BDrate savings by ~5% (RT speed 5)
> and ~12% (RT speed 6). The improvement was measured on the video
> conference set.
> * Improved real time mode for nonrd path (speed 7, 8, 9): BDrate
> gains of ~3-5%.
> * Rate control and RD adjustments based on ML research in VP9.
> Gains of ~0.5-1.0% for HD.
> - Perceptual Quality Improvements
> * Added a new mode --deltaq-mode=3 to improve perceptual quality
> based on a differential contrast model for still images.
> * Added a new mode –deltaq-mode=4 to improve perceptual quality
> based on user rated cq_level data set for still images.
> * Weighting of some intra mode and partition size choices to better
> manage and retain texture.
> - Speedup and Memory Optimizations
> * Further improved 2-pass good quality encoder speed:
> o Speed 2 speedup: 18%
> o Speed 3 speedup: 22%
> o Speed 4 speedup: 37%
> o Speed 5 speedup: 30%
> o Speed 6 speedup: 20%
> * Optimized the real time encoder (measured on the video conference
> o RT speed 5 speedup: 110%
> o RT speed 6 speedup: 77%
> - Bug Fixes
> * Issue 3069: Fix one-pass mode keyframe placement off-by-one error.
> * Issue 3156: Fix a bug in av1_quantize_lp AVX2 optimization.
> I quickly re-packed .tar.gz into xz and renamed libaom patches
> accordingly. It seems to work with ffmpeg-4.4.
> Phyllis, can you test (may be next month?) if libaom-3.2.0 still works on
> both new and old distros (as you use them for appimage build)?
> Also, ffmpeg 4.4.1 was released - mostly bugfixes from fuzzers, it seems,
> but also few changes in util
> Cin mailing list
> Cin at lists.cinelerra-gg.org
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