x265 version 2.3 has been released. This release contains new algorithms that improveto visual quality, encoding efficiency, and performance.
The latest version can be downloaded from here <https://bitbucket.org/multicoreware/x265/downloads/x265_2.3.tar.gz> (MD5 sum = 18716a7e0c6f6ebd2a1035b82cec30de). Full documentation is available at http://x265.readthedocs.io/en/stable/. Release Notes for 2.3 ================ Encoder enhancements ---------------------------------- 1. New SSIM-based RD-cost computation for improved visual quality, and efficiency; use --ssim-rd to exercise. 2. Multi-pass encoding can now share analysis information from prior passes (in addition to rate-control information) to improve performance and quality of subsequent passes; to your multi-pass command-lines that use the --pass option, add --multi-pass-opt-distortion to share distortion information, and --multi-pass-opt-analysis to share other analysis information. 3. A dedicated thread pool for lookahead can now be specified with --lookahead-threads. 4. --dynamic-rd dynamically increase analysis in areas where the bitrate is being capped by VBV; works for both CRF and ABR encodes with VBV settings. 5. The number of bits used to signal the delta-QP can be optimized with the --opt-cu-delta-qp option; found to be useful in some scenarios for lower bitrate targets. 6. Experimental feature option:–aq-motion adds new QP offsets based on relative motion of a block with respect to the movement of the frame. API changes ------------------- 1. Reconfigure API now supports signalling new scaling lists. 2. x265 application’s csv functionality now reports time (in milliseconds) taken to encode each frame. 3. --strict-cbr enables stricter bitrate adherence by adding filler bits when achieved bitrate is lower than the target; earlier, it was only reacting when the achieved rate was higher. 4. --hdr can be used to ensure that max-cll and max-fall values are always signaled (even if 0,0). Bug fixes -------------- 1. Fixed incorrect HW thread counting on MacOS platform. 2. Fixed scaling lists support for 4:4:4 videos. 3. Inconsistent output fix for --opt-qp-pss by removing last slice’s QP from cost calculation. 4. VTune profiling (enabled using ENABLE_VTUNE CMake option) now also works with 2017 VTune builds. Happy compressing! Pradeep.
_______________________________________________ x265-devel mailing list [email protected] https://mailman.videolan.org/listinfo/x265-devel
