Here is an update to SVT-AV1 1.8.0.


## [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
- 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

## [1.7.0] - 2023-08-23

Encoder
- Improve the tradeoffs for the random access mode across presets MR-M13:
 - Quality improvements across all presets and metrics ranging from 0.3% to 4.5% in BD-rate (!2129)
 - Spacing between presets [M1-M6] has been adjusted to account for the tradeoff improvements achieved
  - As a user guidance when comparing v1.7 vs v1.6 in a convexhull encoding setup:
   - v1.7.0 M2 is now at similar quality levels as v1.6.0 M1 while being ~50% faster
   - v1.7.0 M3 is now at similar quality levels as v1.6.0 M2 while being ~50% faster
   - v1.7.0 M4 is now at similar quality levels as v1.6.0 M3 while being ~40% faster
   - v1.7.0 M5 is now at similar quality levels as v1.6.0 M4 while being ~30% faster
   - v1.7.0 M6 is now at similar quality levels as v1.6.0 M5 while being ~25% faster
- Added an experimental tune SSIM mode yielding ~3-4% additional SSIM BD-rate gains (!2109)

Build, cleanup and bug fixes
- Various cleanups and functional bug fixes
- Fix build conflict with libaom

## [1.6.0] - 2023-06-18

Encoder
- Improve the tradeoffs for the random access mode across presets M1-M13:
 - Speeding up the higher quality presets by 30-40%
 - Improving the BD-rate by 1-2% for the faster presets
- Improve the tradeoffs for the low delay mode for both scrren content and non-screen content encoding modes
- Add a toggle to remove the legacy one-frame buffer at the input of the pipeline alowing the low delay mode to operate at sub-frame processing latencies
- Add a new API allowing the user to specify quantization offsets for a region of interest per frame

Build, cleanup and bug fixes
- Various cleanups and functional bug fixes
- Fix the startup minigop size BD-rate loss
- Add ability to run the ci-testing offline


Index: Makefile
===================================================================
RCS file: /cvs/ports/multimedia/svt-av1/Makefile,v
retrieving revision 1.15
diff -u -p -u -p -r1.15 Makefile
--- Makefile	27 Sep 2023 10:10:22 -0000	1.15
+++ Makefile	29 Feb 2024 04:05:06 -0000
@@ -2,7 +2,7 @@ ONLY_FOR_ARCHS=	${LP64_ARCHS} i386
 
 COMMENT=	scalable AV1 encoder/decoder
 
-VER=		1.5.0
+VER=		1.8.0
 DISTNAME=	SVT-AV1-v${VER}
 PKGNAME=	svt-av1-${VER}
 CATEGORIES=	multimedia
Index: distinfo
===================================================================
RCS file: /cvs/ports/multimedia/svt-av1/distinfo,v
retrieving revision 1.12
diff -u -p -u -p -r1.12 distinfo
--- distinfo	30 Apr 2023 11:54:30 -0000	1.12
+++ distinfo	29 Feb 2024 04:05:06 -0000
@@ -1,2 +1,2 @@
-SHA256 (SVT-AV1-v1.5.0.tar.bz2) = pkmwcZBvuEDfGfsOLsl8BP3oLI7WTfuGYvYly4vGJF4=
-SIZE (SVT-AV1-v1.5.0.tar.bz2) = 9490521
+SHA256 (SVT-AV1-v1.8.0.tar.bz2) = QccYO+maLHJlaxX7pABeRsmYzTRkGFA+0pbFq+ZILkc=
+SIZE (SVT-AV1-v1.8.0.tar.bz2) = 9585789