Version 2.6
Release date - 29th November, 2017.

New features
1. x265 can now refine analysis from a previous HEVC encode (using options --refine-inter, and --refine-intra), or a previous AVC encode (using option --refine-mv-type).
　　The previous encode’s information can be packaged using the x265_analysis_data_t data field available in the x265_picture object.
2. Basic support for segmented (or chunked) encoding added with --vbv-end that can specify the status of CPB at the end of a segment.
　　String this together with --vbv-init to encode a title as chunks while maintaining VBV compliance!
3. --force-flush can be used to trigger a premature flush of the encoder.
　　This option is beneficial when input is known to be bursty, and may be at a rate slower than the encoder.
4. Experimental feature --lowpass-dct that uses truncated DCT for transformation.