Hi all, x265 version 3.3 is out with attractive new features like adaptive frame duplication and boundary aware quantization and other enhancements that improve encoding efficiency as well as performance.
Please download v3.3 from our downloads page <https://bitbucket.org/multicoreware/x265/downloads/x265_3.3.tar.gz> ( MD5Sum is 0c8c747b59b5411dea8cf557554636c1) and do check out the full documentation available in our release notes <https://x265.readthedocs.io/en/release_3.3/releasenotes.html>. Release Notes of version 3.3 ====================== New features ------------ 1. *Adaptive frame duplication* to identify and skip encoding of near-identical frames and signal the duplication info to the decoder via pic_struct SEI. :option:`frame-dup` to enable frame duplication and :option:`--dup-threshold` to set the threshold for frame similarity (optional). 2. *Boundary aware quantization* to cut off bits from frames following scene-cut. This leverages the inability of HVS to perceive fine details during scene changes and saves bits. :option:`--scenecut-aware-qp` , :option:`--scenecut-window` and :option:`--max-qp-delta` to enable boundary aware frame quantization, to set window size (optional) and to set QP offset (optional). 3. *Improved scene-cut detection* using edge and chroma histograms. :option:`--hist-scenecut` to enable the feature and :option:`--hist-threshold` (optional) to provide threshold for determining scene cuts. Enhancements to existing features --------------------------------- 1. :option:`--hme-range` to modify search range for HME levels L0, L1, and L2. 2. Improved performance of AQ mode 4 by reducing memory footprint. 3. Introduced :option:`--analysis-save-reuse-level` and :option:`--analysis-load-reuse-level` to de-couple reuse levels of :option:`--analysis-save` and :option:`--analysis-load`. Turnaround time of ABR encoding can be reduced by properly leveraging these options. Encoder enhancements -------------------- 1. Improved VBV lookahead to eliminate blocky artifacts in Intra frames coming towards the end of the title. API changes ----------- 1. New API function *x265_encoder_reconfig_zone()* to invoke zone reconfiguration dynamically. 2. Renamed :option:`--hdr` to :option:`--hdr10`. :option:`--hdr` will be deprecated in the upcoming major release. 3. Renamed :option:`--hdr-opt` to :option:`--hdr10-opt`. :option:`--hdr-opt` will be deprecated in the upcoming major release. 4. Additions to x265_param structure to support the newly added features and encoder enhancements. Bug fixes --------- 1. Output change in :option:`--analysis-load` at inter-refine levels 2 and 3. 2. Encoder crash with zones. 3. Integration issues with SVT v1.4.1. 4. Fixed bug in :option:`--limit-tu` 3 and 4 while loading co-located CU's TU depth. Happy compressing!! -- Regards, *Aruna Matheswaran,* Video Codec Engineer, Media & AI analytics BU,
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