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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
File size:1MB
Portable version
Version history
7.3/10
14 votes
Rate it




Screenshots

x265 Encoder screenshot
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Latest version

3.0 (January 23, 2019)



Download


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Download x265 Encoder 3.0 Windows  1MB  Win  Portable

Download x265 Encoder 3.0 Mac  Mac

Download x265 Encoder 3.0 Linux  Linux




Download Beta and other versions

Download x265 Encoder latest beta Windows  Win

Download x265 Encoder 3.0 from another mirror site  Win



Software License

Free software (Free download and also open source code!)



Supported operating systems

WinWindows MacMac OS LinuxLinux





More information and other downloads




Version history / Release notes / Changelog


Version 3.0
Release date - 23/01/2019

New features
option:: ‘–dolby-vision-profile <integer|float>’ generates bitstreams confirming to the specified Dolby Vision profile. Currently profile 5, profile 8.1 and profile 8.2 enabled, Default 0 (disabled)
option:: ‘–dolby-vision-rpu’ File containing Dolby Vision RPU metadata. If given, x265’s Dolby Vision metadata parser will fill the RPU field of input pictures with the metadata
read from the file. The library will interleave access units with RPUs in the bitstream. Default NULL (disabled).
option:: ‘–zonefile <filename>’ specifies a text file which contains the boundaries of the zones where each of zones are configurable.
option:: ‘–qp-adaptation-range’ Delta-QP range by QP adaptation based on a psycho-visual model. Default 1.0.
option:: ‘–refine-ctu-distortion <0/1>’ store/normalize ctu distortion in analysis-save/load. Default 0.
Experimental feature option:: ‘–hevc-aq’ enables adaptive quantization
It scales the quantization step size according to the spatial activity of one coding unit relative to frame average spatial activity. This AQ method utilizes the minimum variance of sub-unit in each coding unit to represent the coding unit’s spatial complexity.
Encoder enhancements
Preset: change param defaults for veryslow and slower preset. Replace slower preset with defaults used in veryslow preset and change param defaults in veryslow preset as per experimental results.
AQ: change default AQ mode to auto-variance
Cutree offset reuse: restricted to analysis reuse-level 10 for analysis-save -> analysis-load
Tune: introduce –tune animation option which improves encode quality for animated content
Reuse CU depth for B frame and allow I, P frame to follow x265 depth decision
Bug fixes
RC: fix rowStat computation in const-vbv
Dynamic-refine: fix memory reset size.
Fix Issue #442: linking issue on non x86 platform
Encoder: Do not include CLL SEI message if empty
Fix issue #441 build error in VMAF lib

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.




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Alternative to x265 Encoder


DivX HEVC Encoder







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14 reviews, Showing 1 to 5 reviews


Superb quality output, but mega mega slow and a pain to use/set up.

Review by Paulo on Oct 7, 2018 Version: 2.9 OS: Windows 7 64-bit Ease of use: 1/10 Functionality: 9/10 Value for money: 10/10 Overall: 6/10




I'd guess most will have no idea how to use this at all! You need the hardware and power to use it well. Try playing this on a tablet etc and watch your battery drain superfast. Decoder cant keep up with h265 encoded video frames. Might be ready in 5 years!!

Review by Paulo on Jul 5, 2018 Version: 2.8 OS: Windows 7 64-bit Ease of use: 5/10 Functionality: 7/10 Value for money: 10/10 Overall: 7/10




Most won't have a clue how to use it and will need a GUI. This codec is only worth using if you need small bit rates as it excels and you only need to use half as h264. Quality of h264/h265 is same at higher bit rate so they say, but h265 still washes out detail. Who wants to use low bit rate these days or has the CPU power to decode it on a PC or tablet as yet?

Long way to go before any compatible hardware addresses the huge power needs of this codec. Also enclosing takes ages with this codec. H264 is still the daddy!


Review by Tony on May 25, 2018 Version: 2.8 OS: Windows 10 64-bit Ease of use: 1/10 Functionality: 7/10 Value for money: 10/10 Overall: 7/10




Post #5 by D88M
x265 is a command line software.
x265 is used in several free video converters like Handbrake, StaxRip, MEGUI, etc.
Apparently you ability is limited to Encoder GUIs
Try learning CLI, it's simple
I give 10/10 for x265, superb encoder...obviously


Review by M99 on Feb 9, 2018 Version: 2.6+37 OS: Windows 10 64-bit Ease of use: 10/10 Functionality: 10/10 Value for money: 10/10 Overall: 10/10




No comments. Rating it only.

Review by aQQ on Aug 9, 2017 Version: 2.5+6-d11482e5fedb OS: Windows 7 64-bit Ease of use: 7/10 Functionality: 8/10 Value for money: 10/10 Overall: 9/10


14 reviews, Showing 1 to 5 reviews

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