[x265] [ANN]x265 version 3.4 released

[Aruna Matheswaran]

Hi all,

x265 version 3.4 is out with cool new features and encoder enhancements in
terms of encoding efficiency as well as speed.

Please download v3.4 from our downloads page
<https://bitbucket.org/multicoreware/x265/downloads/x265_3.4.tar.gz> (
MD5Sum is e37b91c1c114f8815a3f46f039fe79b5) and do check out the full
documentation
available in our release notes
<https://x265.readthedocs.io/en/default/releasenotes.html#version-3-4>.

Release Notes of version 3.4
======================

New features
------------
1. **Edge-aware quadtree partitioning** to terminate CU depth recursion
based on edge information. :option:`--rskip` level 2 enables the feature
and  :option:`--rskip-edge-threshold` denotes the minimum expected
edge-density percentage within the CU, below which the recursion is
skipped. Experimental feature.
2. Application-level feature :option:`--abr-ladder` for automating
efficient ABR ladder generation. Shows ~65% savings in the over-all
turn-around time required for the generation of a typical Apple HLS ladder
in Intel(R) Xeon(R) Platinum 8280 CPU @ 2.70GHz over a sequential
ABR-ladder generation approach that leverages save-load architecture.

Enhancements to existing features
---------------------------------
1. Improved efficiency in 2-pass rate-control algorithm. The savings in the
bitrate is ~1.72% with visual improvement in quality in the initial 1-2
secs.

Encoder enhancements
--------------------
1. Faster ARM64 encodes enabled by ASM contributions from Huawei. The
speed-up over no-asm version for 1080p encodes @ medium preset is ~15% in a
16 core H/W.
2. Strict VBV conformance in zone encoding.

Bug fixes
---------
1. Multi-pass encode failures with :option:`--frame-dup`.
2. Corrupted bitstreams with :option:`--hist-scenecut` when input depth and
internal bit-depth differ.
3. Incorrect analysis propagation in multi-level save-load architecture.
4. Failure in detecting NUMA packages installed in non-standard directories.

Happy compressing!!


-- 
Regards,
*Aruna Matheswaran,*
Video Codec Engineer,
Media & AI analytics BU,
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