Major release with new API updates that are not backwards compatible.
Extended the crf range to 70 reducing the impact or QP scaling allowing the encoder to reach lower bitrates
Added quarter steps between crf increments to allow for further granularity in qp selection
Added support for setting a custom global logger for library consumers (!2570 (merged), !2579 (merged))
Cleaned up public API headers including removal of deprecated macros, structs, and fields (!2565 (merged), !2568 (merged))
Additionally cleaned up anything marked using SVT_AV1_CHECK_VERSION().
Added ability to calculate per-frame PSNR and SSIM metrics (!2521 (merged))
Allow sending more than 1 but less than 4 frames with avif mode (This is not for AVIF image sequence, but for encoding an alpha layer) (!2551 (merged), !2560 (merged))
Added tune IQ and MS-SSIM for Still Image coding mode
Encoder
Significant improvements in AVIF and still image modes (!2552 (merged),!2567 (merged)):
~5-8x speedup M11-M0 at the same quality levels with tune MS-SSIM
~5-8% BD-Rate improvements at the same complexity with tune MS-SSIM
Tradeoff improvements for the RTC modes (!2558 (merged)):
~5-15% speedup at similar quality levels in --rtc mode across presets 7 - 11
Tradeoff improvements for the Random Access mode (VOD use case) showing a 10-25% speedup across presets M7 down to M0 for --fast-decode 1 and 2 (!2558 (merged))
Major feature updates for the visual quality mode with the completion porting all SVT-AV1-PSY applicable features for --tune vq for video and --tune iq for avif (!2484 (merged), !2489 (merged), !2491 (merged), !2494 (merged), !2496 (merged), !2503 (merged), !2504 (merged), !2507 (merged), !2514 (merged), !2522 (merged) , !2561 (merged), !2562 (merged), !2576 (merged)):
Added AC Bias, a psychovisual feature that improves detail preservation and film grain retention
Update S-Frame support to allow setting it in a specific decode order option and with more qp options (!2477 (merged) !2523 (merged) !2534 (merged))
Further Arm Neon and SVE2 optimizations that improve high bitdepth encoding by an average of ~5% in low resolutions
GnuLinuxDude
lemmy.ml
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