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Rating
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x265 Encoder is a free software library and application for encoding video streams into the H265/MPEG-H HEVC compression format, and is released under the terms of the GNU GPL. x265 CLI is a command line software. x265 is used in several free video converters like Handbrake, Xvid4PSP, StaxRip, RipBot264, MEGUI, Xmedia Recode, etc. See All features how to install on Linux/Mac OSX.

Free software
OS:Windows Mac Linux
Version:2.3 Stable / 2.3+8 Nightly
Released:Feb 20, 2017
File size:1MB
8.3/10
3 votes




x265 Encoder screenshot
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Latest version

2.3 Stable / 2.3+8 Nightly (February 20, 2017)




Download


Visit developer's site

Download x265 Encoder 2.3 Stable  [1MB]  [Win]  [Portable]




Download beta, Mac, Linux, mirror and other versions

Download x265 Encoder 2.3+8 Nightly  [Win]

Download x265 Encoder 2.3+8 Nightly 64-bit  [Win64]

Download x265 Encoder 2.3 Stable from another mirror site  [Win]

Download x265 Encoder Mac version  [Mac]

Download x265 Encoder Linux version  [Linux]




Supported operating systems

WinWindows MacMac OS LinuxLinux




License

Free software




More information and other downloads





Version history / Release notes / Changelog


2.3+8 Nightly
Ma0 SAO: avoid negative indexes in 'x265_lambda2_tab' table 2017-02-16
Gopi Satykrishna Akisetty fix the chroma offset computation for HDR/WCG content 23 hours ago
Gopi Satykrishna Akisetty Add Luma and Chroma offsets for HDR/WCG content 2017-02-01
Ma0 silence GCC 7 warnings 2017-02-11
Ma0 update the year in output stream header 2017-02-11
Ma0 CLI: allow Unicode filenames (Windows) for 'scaling-list', 'lambda-file' and 'analysis-file' 2017-02-11

Version 2.3
Release date - 15th February, 2017.

Encoder enhancements
New SSIM-based RD-cost computation for improved visual quality, and efficiency; use --ssim-rd to exercise.
Multi-pass encoding can now share analysis information from prior passes (in addition to rate-control information) to improve performance and quality of subsequent passes; to your multi-pass command-lines that use the --pass option, add --multi-pass-opt-distortion to share distortion information, and --multi-pass-opt-analysis to share other analysis information.
A dedicated thread pool for lookahead can now be specified with --lookahead-threads.
option:–dynamic-rd dynamically increase analysis in areas where the bitrate is being capped by VBV; works for both CRF and ABR encodes with VBV settings.
The number of bits used to signal the delta-QP can be optimized with the --opt-cu-delta-qp option; found to be useful in some scenarios for lower bitrate targets.
Experimental feature option:–aq-motion adds new QP offsets based on relative motion of a block with respect to the movement of the frame.
API changes
Reconfigure API now supports signalling new scaling lists.
x265 application’s csv functionality now reports time (in milliseconds) taken to encode each frame.
--strict-cbr enables stricter bitrate adherence by adding filler bits when achieved bitrate is lower than the target; earlier, it was only reacting when the achieved rate was higher.
--hdr can be used to ensure that max-cll and max-fall values are always signaled (even if 0,0).
Bug fixes
Fixed incorrect HW thread counting on MacOS platform.
Fixed scaling lists support for 4:4:4 videos.
Inconsistent output fix for --opt-qp-pss by removing last slice’s QP from cost calculation.
VTune profiling (enabled using ENABLE_VTUNE CMake option) now also works with 2017 VTune builds.

View full changelog




All features


Encoder features
Full prediction and transform quad-tree recursion supported
Adaptive B-frame placement
B-frames as references / arbitrary frame order
CABAC entropy coding
Intra: all block types (32x32, 16x16, 8x8, 4x4, and PCM with all predictions)
Inter P: all partitions (from 64x64 down to 8x4)
Inter B: partitions from 64x64 down to 8x4 (including all merge modes
and biprediction)
Weighted prediction for P slices
Multiple reference frames
Ratecontrol: constant quantizer, constant quality, single pass ABR, optional VBV
Scenecut detection
Parallel encoding on multiple CPUs, both frame-level and wavefront parallelism


Linux x265 Install 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 https://bitbucket.org/multicoreware/x265
$ cd x265/build/linux
$ ./make-Makefiles.bash
$ make


Mac OS X x265 Install Instructions
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.




Sections/Browse similar tools






Alternative to x265 Encoder


DivX HEVC Encoder







Guides and How to's


Download x265 Encoder portable download



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3 comments, Showing 1 to 3 comments

Xvid style encoder were every preset is pleasing for the eye in contrast to x264 were only Placebo prevents eye cancer but there is one huge problem as it looks artificial as there is a film over it (others called it washed out)


Oct 23, 2015 Version: 1.7.0.374 OS: Windows 8 64-bit Ease: 5/10 Functionality: 5/10 Value: 5/10 Overall: 5/10



I have been using the stable version non stop with excellent results. Far more superior than x264 and this is only the beginning. A big thank you to the developers for this amazing encoder.


Oct 10, 2015 Version: 1.8.31 OS: Windows 7 64-bit Ease: 10/10 Functionality: 10/10 Value: 10/10 Overall: 10/10



Can't believe I'm the first to review such a great program here. The compression of this encoder is unreal and getting cleaner and faster as time goes on. By my own tests, 1.7 is about 33% faster than 1.6 which is amazing and hope further optimizations happen. x264 had to start somewhere and x265 will be no different.

Over the past month I have been encoding with it on high bitrate x264 files that I don't care to keep at their current file size, so I encode them with this with avisynth to retain most of the detail at a fraction of the size. I'm also doing this just to get a handle on this new HEVC beast.

All I need now is a HEVC TV Player...



Jul 10, 2015 Version: 1.7 OS: Windows 7 64-bit Ease: 9/10 Functionality: 10/10 Value: 10/10 Overall: 10/10


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