ibde265 is an open source implementation of the h.265 video codec. It is written from scratch and has a plain C API to enable a simple integration into other software.

libde265 supports WPP and tile-based multithreading and includes SSE optimizations. The decoder includes all features of the Main profile and correctly decodes almost all conformance streams.

libde265 is released under the LGPL, further information are available at
http://www.libde265.org
https://github.com/strukturag/libde265