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x265 HEVC Encoder

Release tarballs

Source release zip files can be downloaded from

MD5 (x265_1.5.tar.gz) = e836defd0a412854af283c19697abda9
MD5 (x265_1.6.tar.gz) = 32e4151f8b6a32b466b1055562ebfb4f

x265 developer wiki

To compile x265 you must first install Mercurial (or TortoiseHg on Windows) and CMake 2.8.8 or later. To ensure your build of x265 is capable of full performance, install YASM 1.2.0 or greater to compile assembly primitives. Then follow these easy steps:

For detailed instructions, consult our build README. Basic instructions are outlined below.

Linux Instructions

# ubuntu packages:
$ sudo apt-get install mercurial cmake cmake-curses-gui build-essential yasm
# Note: if the packaged yasm is older than 1.2, you must download yasm (1.3 recommended) and build it

$ hg clone
$ cd x265/build/linux
$ ./make-Makefiles.bash
$ make

Windows (Visual Studio) Instructions

$ hg clone

Then run make-solutions.bat in the build\ folder that corresponds to your favorite compiler, configure your build options, click 'configure', click 'generate', then close cmake-gui. You will be rewarded with an x265.sln file. Also see cmake documentation.

Intel Compiler Instructions

On Windows, you should open an Intel Compiler command prompt and within it run one of the make-makefiles.bat scripts in build/icl32 or build/icl64, then run nmake.

On Linux, you can tell cmake to build Makefiles for icpc directly. This requires you to have configured Intel's compiler environment (by sourcing the appropriate shell script). For example:

$ source /opt/intel/composerxe/bin/ intel64
$ cd repos/x265/build/linux
$ export CXX=icpc
$ export CC=icc
$ ./make-Makefiles
$ make

Mac OS X

The latest Mac OS X 10.8 gcc and clang based compilers can build x265 using the linux instructions above. Xcode 5 with the most recent patches can build, debug, and profile x265.

Command line interface

The Makefile/solution builds a static encoder.lib library and a standalone x265 executable that aims to be similar to x264 in its command line interface. Running without arguments shows you the command line help. See also the online documentation