x265 version 1.8 has been released. This release supports 12bit input depths, a large amount of AVX2 optimizations, entropy coding optimizations, as well as new quality features.
Full documentation is available at
http://x265.readthedocs.org/en/stable/
================== API Changes =====================
• Experimental support for Main12 is now enabled. Partial assembly support exists.
• Main12 and Intra/Still picture profiles are now supported. Still picture profile is detected based on x265_param::totalFrames.
• Three classes of encoding statistics are now available through the API.
o x265_stats - contains encoding statistics, available through x265_encoder_get_stats()
o x265_frame_stats and x265_cu_stats - contains frame encoding statistics, available through recon x265_picture
• --csv
o x265_encoder_log() is now deprecated
o x265_param::csvfn is also deprecated
• --log-level now controls only console logging, frame level console logging has been removed.
• Support added for new color transfer characteristic ARIB STD-B67
=================== New Features ===================
• limit-refs
o This feature limits the references analysed for individual CUS.
o Provides a nice tradeoff between efficiency and performance.
• aq-mode 3
o A new aq-mode that provides additional biasing for low-light conditions.
• An improved scene cut detection logic that allows ratecontrol to manage visual quality at fade-ins and fade-outs better.
================ Preset and Tune Options ===============
• tune grain
o Increases psyRdoq strength to 10.0, and rdoq-level to 2.
• qg-size
o Default value changed to 32.