The latest x264 source code is available through git repository:
# git clone https://code.videolan.org/videolan/x264.git
You can browse the source on-line.
Official builds for Windows, Linux, and MacOSX are available from here.
2010 May 25 — x264 won MSU Sixth MPEG-4 AVC/H.264 Video Codecs Comparison, with ~24% better encoding than second place.
2005 December 26 — x264 won Doom9's 2005 codec shoot-out, passing Ateme by a hair.
2005 December 12 — x264 tied for 1st place (with Ateme) in the second annual MSU MPEG-4 AVC/ H.264 codecs comparison.
For support information and to ask questions, you have the following possibilities:
Please report any bugs on the Issue tracker.
If it is a crash, then compile x264 with
./configure --enable-debug and follow the ffmpeg bugreporting guidelines.
In addition to being free to use under the GNU GPL, x264 is also available under a commercial license. Contact firstname.lastname@example.org for more details.
If you use x264 in another project, let us know!