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x264 is an open source H264/AVC based video encoder. The x264 CLI is a command line x264 encoder tool and is used in several converters like Handbrake, Xvid4PSP, StaxRip, RipBot264, FairUse Wizard, MEGUI.

Free software
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Version:r2409 History
Released:

Size:8.3MB


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9.2/10
16 votes


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  Latest version:
r2409 (March 13, 2014)


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Download x264 Encoder from developer's site (8.3MB)


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Download x264 Encoder Linux version





Supported operating systems:
Windows Mac OS Linux


More information and other downloads:
Download Komisar's unoffical x264 VFW Codec here or another an unoffical x264 VFW Codec here, use x264 in for example Virtualdub or other that supports Video For Windows(VFW) Codecs. Both encoding and decoding.

x264 Encoder GUIs/Frontends:
Handbrake, Xvid4PSP, StaxRip, RipBot264, FairUse Wizard, MEGUI, AutoX264, HDConvertToX.


Sections/Browse similar tools:
Linux video toolsMacOS video toolsVideo Encoders (H264/MP4/MKV)

x264 Encoder screenshot
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Version history/Release notes:
4 hours agoMacroblock tree overhaul/optimization master
Jason Garrett-Glaser [Sun, 23 Feb 2014 19:36:55 +0100 (10:36 -0800)]
Macroblock tree overhaul/optimization

Move the second core part of macroblock tree into an assembly function;
SIMD-optimize roughly half of it (for x86). Roughly ~25-65% faster mbtree,
depending on content.

Slightly change how mbtree handles the tradeoff between range and precision
for propagation.

Overall a slight (but mostly negligible) effect on SSIM and ~2% faster.

4 hours agoarm: use available neon functions for intra_sa8d/sad/satd_x3
Janne Grunau [Thu, 13 Mar 2014 00:05:48 +0100 (00:05 +0100)]
arm: use available neon functions for intra_sa8d/sad/satd_x3

4% faster on main/medium, 15% faster on baseline/superfast on a cortex-a9.

26 hours agoarm: implement x264_pixel_var2_8x16_neon
Janne Grunau [Wed, 12 Mar 2014 14:35:31 +0100 (14:35 +0100)]
arm: implement x264_pixel_var2_8x16_neon

checkasm --bench on a cortex-a9:
var2_8x16_c: 5677
var2_8x16_neon: 1421

26 hours agoarm: implement x264_pixel_var_8x16_neon
Janne Grunau [Wed, 12 Mar 2014 13:16:00 +0100 (13:16 +0100)]
arm: implement x264_pixel_var_8x16_neon

checkasm --bench on a cortex-a9:
var_8x16_c: 4306
var_8x16_neon: 791

42 hours agox86: SSE2 and SSSE3 plane_copy_deinterleave_rgb
Henrik Gramner [Sun, 23 Feb 2014 15:33:48 +0100 (15:33 +0100)]
x86: SSE2 and SSSE3 plane_copy_deinterleave_rgb

About 5.6x faster than C on Haswell.

42 hours agox86: Minor mbtree_propagate_cost improvements
Henrik Gramner [Sun, 16 Feb 2014 21:24:54 +0100 (21:24 +0100)]
x86: Minor mbtree_propagate_cost improvements

Reduce the number of registers used from 7 to 6.
Reduce the number of vector registers used by the AVX2 implementation from 8 to 7.
Multiply fps_factor by 1/256 once per frame instead of once per macroblock row.
Use mova instead of movu for dst since it's guaranteed to be aligned.
Some cosmetics.

42 hours agox86inc: Support arbitrary stack alignments
Henrik Gramner [Sun, 9 Feb 2014 23:58:04 +0100 (23:58 +0100)]
x86inc: Support arbitrary stack alignments

If the stack is known to be at least 32-byte aligned we can safely store ymm
registers on the stack without doing manual alignment.

Change ALLOC_STACK to always align the stack before allocating stack space for
consistency. Previously alignment would occur either before or after allocating
stack space depending on whether manual alignment was required or not.

42 hours agox86inc: warn if XOP integer FMA instruction emulation is impossible
Anton Mitrofanov [Fri, 14 Feb 2014 12:53:58 +0100 (15:53 +0400)]
x86inc: warn if XOP integer FMA instruction emulation is impossible

Emulation requires a temporary register if arguments 1 and 4 are the same; this
doesn't obey the semantics of the original instruction, so we can't emulate
that in x86inc.

ffmpeg has an x86util emulation for that case; I'll add it if x264's asm ever
needs it.

Also add pmacsdql emulation.

42 hours agox86inc: free up variable name "n" in global namespace
Loren Merritt [Sat, 1 Mar 2014 03:57:56 +0100 (02:57 +0000)]
x86inc: free up variable name "n" in global namespace

42 hours agox86: Pass -Worphan-labels to yasm
Henrik Gramner [Wed, 22 Jan 2014 19:09:12 +0100 (19:09 +0100)]
x86: Pass -Worphan-labels to yasm

Makes it easier to detect typos.

42 hours agoWrite 3D metadata when outputting Matroska
Steve Lhomme [Sun, 16 Feb 2014 13:15:09 +0100 (13:15 +0100)]
Write 3D metadata when outputting Matroska

For when --frame-packing is set.

42 hours agoDon't set chroma_loc_info_present_flag for non-4:2:0
Anton Mitrofanov [Sun, 23 Feb 2014 13:56:03 +0100 (16:56 +0400)]
Don't set chroma_loc_info_present_flag for non-4:2:0

The H.264 spec says it shouldn't be set in these cases.

42 hours agox264.h: fix documentation stable
Jason Garrett-Glaser [Mon, 10 Mar 2014 16:42:50 +0100 (08:42 -0700)]
x264.h: fix documentation

The full details of the return values of encoder_encode and encoder_headers
were mistakenly removed a while ago; re-add them.

42 hours agoFix pointer cast warning for 64-bit builds
Anton Mitrofanov [Sun, 23 Feb 2014 12:52:57 +0100 (15:52 +0400)]
Fix pointer cast warning for 64-bit builds

2 days agombaff: fix mb_field_decoding_flag tracking and simplify allow skip check
Anton Mitrofanov [Mon, 10 Mar 2014 13:48:02 +0100 (16:48 +0400)]
mbaff: fix mb_field_decoding_flag tracking and simplify allow skip check

Fixes an issue with too many forced non-skips in mbaff+cavlc, as well as
non-deterministic output with mbaff+cavlc+sliced-threads.

2 days agoFix memory overwrite in x264_deblock_h_chroma_mbaff_sse2
Anton Mitrofanov [Mon, 10 Mar 2014 00:22:57 +0100 (03:22 +0400)]
Fix memory overwrite in x264_deblock_h_chroma_mbaff_sse2

Fixes possible corruption with MBAFF+sliced threads.

2 days agoFix corruption with CAVLC overflow handling in MBAFF+main profile
Jason Garrett-Glaser [Sun, 2 Mar 2014 19:09:01 +0100 (10:09 -0800)]
Fix corruption with CAVLC overflow handling in MBAFF+main profile

Probably a regression in 83561e.

2 days agoFix checkasm --bench output when nop_cycles is too large
Anton Mitrofanov [Mon, 10 Mar 2014 18:17:19 +0100 (21:17 +0400)]
Fix checkasm --bench output when nop_cycles is too large

2 weeks agoReally fix quantization factor allocation
Anton Mitrofanov [Wed, 22 Jan 2014 09:54:49 +0100 (12:54 +0400)]
Really fix quantization factor allocation

Actually allocate less (instead of just initialize less) and fix comments.

2 weeks agoFix build with Android NDK
Yu Xiaolei [Sun, 23 Feb 2014 13:12:51 +0100 (04:12 -0800)]
Fix build with Android NDK

Android NDK does not expose sched_getaffinity.

View full changelog



Alternative to x264 Encoder:
TMPGEnc Video Mastering Works
TotalCode Studio



Guides and How to's:
Creating / Converting Blu-rays with x264 (command line options) - Read
x264 Encoding Options Explained - Read
X264 Settings explained - Read
View all guides with guide description here


Acronyms / Also Known As:
x264 cli, x264cli

Comments Post comment
16 comments, Showing 1 to 16 comments
 - 

Superb!!!


Posted November 30, 2013 by . Tool version 0.130.2273 using OS WinXP
Ease of use 9 of 10 Functionality 8 of 10 Value for money 10 of 10 Overall score 9 of 10


Brilliant software.

I use this commandline tool as part of a conversion sequence to turn TV captures into smaller .mp4s for later playback on a "WDTV Live" box.

The X264 commandline can be daunting to figure out initially (examples abound though, just search) but once you have a useful commandline then Bob's your Uncle. eg "my" commandline creates h264 video which is proven fully compatible with the WDTV Live in terms of the "video technical compliance stuff". Happy days.

X264, when combined with FFMPEG to convert audio and with MP4box to mux the video/audio into an .mp4, provides you with capability to create your own (repeatable) custom tailored encodes.

Fantastic.



Posted July 30, 2011 by . Tool version 2044 using OS Windows 7 64-bit
Ease of use 4 of 10 Functionality 10 of 10 Value for money 10 of 10 Overall score 9 of 10


Extreme compression might be a very good feature for Sharing in-contra to my previous comment. Still figuring-out quality settings for personal back-up.

Other ripping tools like Xvid4PSP, StaxRip, RipBot264, FairUse Wizard, MEGUI must be updated to this version accordingly.



Posted September 03, 2010 by . Tool version Version:r1703 using OS Linux
Ease of use 9 of 10 Functionality 9 of 10 Value for money 9 of 10 Overall score 9 of 10


v r1703 better compression, but, video loses overall sharpness.
it's disappointing.
Target Video Bit rate : 1 500 Kbps
Actual Video Bit rate : 817 Kpbs (Too Low than target results-in poor Quality)


Hope for better improvement in next release.



Posted August 26, 2010 by . Tool version r1703 using OS Windows 7
Ease of use 9 of 10 Functionality 9 of 10 Value for money 9 of 10 Overall score 9 of 10


Simply the best implementation of H.264 spec.

It is a CLI tool so some patience is required to learn it, otherwise use some great GUI's like
Ripbot, StaxRip, or MeGUI.



Posted July 13, 2010 by . Tool version 1666 using OS Windows 7
Ease of use 5 of 10 Functionality 10 of 10 Value for money 10 of 10 Overall score 10 of 10


The BEST,
and my most favorite video encoder.

Thanks for continuous updates.

Note:-
======
x264 vfw requires same trends for updates too!



Posted May 30, 2010 by . Tool version r1613 using OS WinXP
Ease of use 9 of 10 Functionality 9 of 10 Value for money 9 of 10 Overall score 9 of 10


Simply The Best H264 encoder available, no doubt.
Thanks to authors for keeping FREE,
and running a good show of updates.



Posted May 17, 2010 by . Tool version 1592 using OS WinXP
Ease of use 9 of 10 Functionality 9 of 10 Value for money 9 of 10 Overall score 9 of 10


By far the best H.264 encoder I've ever experienced. It even dwarfed all these commercial products and it's getting better!



Posted May 01, 2010 by . Tool version 1570 using OS WinXP
Ease of use 5 of 10 Functionality 10 of 10 Value for money 10 of 10 Overall score 10 of 10


Unless you device does not support h264 part 10 (AVC) then there is NO REASON why you should not be using x264, even if you are not a console God , there is plenty of GUI's that harness the power of this codec implmentation.


Posted November 30, 2009 by . Tool version 1354 using OS Windows 7 64-bit
Ease of use 10 of 10 Functionality 10 of 10 Value for money 10 of 10 Overall score 10 of 10


I have been an AVI with XviD and MP3 die hard fan for a LONG time! I just recently graduated to using MKV files and building my own chapters. THEN, I discovered that I can encode H264/X264 files and *directly* mux the AC3 audio from a DVD rip into an MKV.

What I did NOT expect was the quality of video as such low bit rates.

I very extensively use my Western Digital WD TV to play the videos I make on. When using XivD to encode 720 videos (1280X720), I *must* run at least 5000kbs to have a decent picture. With H264 (or better yet, x264.exe) the video quality is superior, at only 2500kbs!!!

Now I wish my Creative Zen would support 264, because it is leaps and bounds better than WMV9!!

I love this CLI tool, thanks so much to the author(s)!!! I hope to have a GUI built soon, and have plans on making a GUI tool kit for MKVs! Thanks!



Posted February 02, 2009 by . Tool version r1097 using OS WinXP
Ease of use 10 of 10 Functionality 10 of 10 Value for money 10 of 10 Overall score 10 of 10


With this codec,you have DVD-like picture quality on VCD bitrates!
IMO, the future is here, in this codec!

I use it with super encoder to batch convert dvb mpeg2 files of various framesizes. The speed is 1/4 realtime on my core 2 duo 6600.

The vfm version is faster (about 2/5 realtime). You can use it with virtualdub.

An excellent choice for those who like cutting edge solutions, or something with great future in front of it!



Posted April 25, 2007 by . Tool version cor54 rev600 using OS WinXP
Ease of use 10 of 10 Functionality 10 of 10 Value for money 10 of 10 Overall score 10 of 10


X264 is the best codec I ever used. Thanks to DeathToSheep for the unofficial VFW version I can stay using it with virtualdub.
I capture with Mainconcept PVR in MPEG2 (quality 32) and convert with VirtualdubMPG to AVI files (X264 -single pass bitrate 800)
With this combination of videotools I can put 13 episodes (50minutes/episode) of my favorite "Aspe murders" soap on 1 DVD and the quality is much,much better than VHS.



Posted December 05, 2006 by . Tool version 6.00 using OS WinXP
Ease of use 8 of 10 Functionality 10 of 10 Value for money 10 of 10 Overall score 9 of 10


After being skeptical about AVC H.264 I finally broke down and decided to try it for some iPod movies. The source files were MPEG-1 @ 1856kbps ripped from some high bitrate xVCD's I did years ago, I tried doing these with 3ivX and DivX 6.2.5 and wasn't pleased with the results especially on HDTV, I tried x264 using MeGUI and I am blown away by the 2-pass quality @ 700kbps. Even at a low resolution of 352x144 these movies look good (not great)on a 42" HDTV and the file sizes are quite small. MeGUI is a very powerful program but not exactly for noobs, When the ability for 640x480 iPod resolutions becomes possible this codec will be unstoppable!!


Posted September 24, 2006 by . Tool version 565 using OS WinXP
Ease of use 7 of 10 Functionality 9 of 10 Value for money 10 of 10 Overall score 9 of 10


What's xvid?? what's divx?? what's wmv??

No way X264 the best codec ever.

High quality in low bitrate.

This awesome codec use for me for months.No rival.

Cauptain



Posted January 27, 2006 by . Tool version 409 using OS WinXP
Ease of use 10 of 10 Functionality 10 of 10 Value for money 10 of 10 Overall score 10 of 10


Better quality than XVID and a smaller file size. Use the latest FFDshow from Celtic_Druid for playback. Be aware that playback is CPU intensive - Not designed for < 2.0Ghz machines (yet).


Posted June 15, 2005 by . Tool version 263 using OS WinXP
Ease of use 8 of 10 Functionality 9 of 10 Value for money 10 of 10 Overall score 9 of 10


works now correctly in sony vegas - testing quality against other H264, but so far - this is a winner ..




Posted June 14, 2005 by . Tool version Revision 261 using OS WinXP
Ease of use 8 of 10 Functionality 10 of 10 Value for money 10 of 10 Overall score 9 of 10

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