v2.0.0-rc1

[gianni-rosato]

Note: this is a release candidate, not an official release. Expect the lack of polish that usually accompanies pre-release software, as well as this incomplete release changelog. Note that this is also the same changelog as v1.9.0-rc1 because they are the same version with different numbers.

PSY Updates

• Presets got faster, so in addition to Preset -2, we have an even slower Preset -3
• --sharpness now accepts negative values
• The SVT-AV1-PSY encoder now supports Dolby Vision encoding via Dolby Vision RPUs. To build with Dolby Vision support, supply pass --enable-libdovi to ./build.sh on macOS/Linux (or enable-libdovi to ./build.bat on Windows).

Mainline Updates

Encoder

• Improve the tradeoffs for the random access mode across presets:
• Speedup presets MR by ~100% and M0 to M8 by 3-28% while maintaining similar quality levels
• Improved the compression efficiency of presets M9-M13 by 1-4% (!2179)
• Simplified VBR multi-pass to use 2 passes to allow integration with ffmpeg
• Continued adding ARM optimizations for functions with c_only equivalent

Cleanup and bug fixes and documentation

• Various cleanups and functional bug fixes
• Update the documentation to reflect the rate control updates

Full Changelog: https://github.com/gianni-rosato/svt-av1-psy/commits/v2.0.0-rc1

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This discussion was created from the release v2.0.0-rc1.

[libreom]

What is the breaking change for 2.0

[gianni-rosato]

Between this and 1.9, there isn't one. Between this and 1.8, there's a discussion on the mainline repo: https://gitlab.com/AOMediaCodec/SVT-AV1/-/issues/2155