SVT-AV1 2.3 is now available as the newest feature release to this leading open-source AV1 encoder. With SVT-AV1 2.3 there are yet more performance improvements.

SVT-AV1 2.3 was released yesterday and while it's already the fastest AV1 encoder around, the new version brings yet more improvements for squeezing out additional performance for CPU-based AV1 coding. The prominent highlights include:

- NEW FAST DECODE MODE

- New fast-decode (2) to allow for an average AV1 software cycle reduction of 25-50% vs fast-decode 0 with a 1-3% BD-Rate loss across the presets

- Improved fast-decode (1) option to increase its AV1 software cycle reduction by ~10% while maintaining the same quality levels

- Improved --lp settings for high resolutions, with CRF gaining a ~4% improvement in speed and VBR gaining ~15%

- Further Arm-based optimizations improving the efficiency of previously written Arm-neon implementations by an average of 30%.

- Address speed regressions for high resolutions first pass encode by tuning the threading parameters, with 1080p showing the biggest gains

- Enabled AVX512 by default in cmake allowing for ~2-4% speedup

- Enabled LTO by default if using a new enough compiler

The benchmarks shown in this release announcement highlight the very significant performance uplift over the prior release:

SVT-AV1 2.3 can be downloaded via the project's [1]GitLab . I'll be working on some new [2]SVT-AV1 benchmarks shortly for different CPUs.



[1] https://gitlab.com/AOMediaCodec/SVT-AV1/-/releases/v2.3.0

[2] https://openbenchmarking.org/test/pts/svt-av1#results