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x264

x264 is a free software library and application for encoding video streams into the H.264/MPEG-4 AVC compression format, and is released under the terms of the GNU GPL.

Download x264 icon Download x264 master  •  Source  •  475kB Binaries

Features Overview

Provides best-in-class performance, compression, and features.

Achieves dramatic performance, encoding 4 or more 1080p streams in realtime on a single consumer-level computer.

Gives the best quality, having the most advanced psychovisual optimizations.

Support features necessary for many different applications, such as television broadcast, Blu-ray low-latency video applications, and web video.

x264 forms the core of many web video services, such as Youtube, Facebook, Vimeo, and Hulu. It is widely used by television broadcasters and ISPs.

News

2013 August 23 -- The x264 Development Newsletter: Volume 39 is out.

2013 July 4 -- The x264 Development Newsletter: Volume 38 is out.

2013 May 20 -- The x264 Development Newsletter: Volume 37 is out.

2013 May 4 -- The x264 Development Newsletter: Volume 36 is out.

Getting x264

Source

The latest x264 source code can always be found by anonymous git repository:

# git clone git://git.videolan.org/x264.git

Or grab a daily tarball.

You can browse the source on-line.

Application binaries

Official builds for Windows, Linux, and MacOSX are available from here.

Awards

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.

Encoder features

Support

For support information and to ask questions, you have the following possibilities:

A mailing list (x264-devel), a forum (Doom10), and IRC (#x264@freenode and #x264dev@freenode).

Bugs

Please report any bugs to the mailing list. If it is a crash, then compile x264 with `./configure --enable-debug` and follow the ffmpeg bugreporting guidelines.

Licensing

In addition to being free to use under the GNU GPL, x264 is also available under a commercial license from x264 LLC and CoreCodec. Contact info@x264licensing.com for more details.

Software using x264

If you use x264 in another project, let us know!