x265 2.1 Released

x265 version 2.1 has been released.  Full documentation is available at http://x265.readthedocs.org/en/stable/

Release Notes for 2.1

Encoder enhancements

  1. Support for qg-size of 8
  2. Experimental support for slice-parallelism.
  3. Able to insert non-IDR I-frames at scene changes when encoding with fixed GOP lengths (min-keyint = keyint)

API changes

  1. Encode user-define SEI messages passed in through x265_picture object.
  2. Disable SEI and VUI messages from the bitstream
  3. Specify qpmin and qpmax
  4. Control number of bits to encode POC.

Bug fixes

  1. QP fluctuation fix for first B-frame in mini-GOP for 2-pass encoding with tune-grain.
  2. Assembly fix for crashes in 32-bit from dct_sse4.
  3. Threadpool creation fix in windows platform.