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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. Command line software.

Free software
OS: Win Mac Linux
File size: 1MB
Portable version
Other versions
Version history
6.7/10
25 votes
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Screenshots

x265 Encoder screenshot
Latest version

3.5 (March 18, 2021)



Download


Visit developer's site

Download x265 Encoder 3.5 Windows  1MB  Win  Portable

Download x265 Encoder 3.5 Mac  Mac

Download x265 Encoder 3.5 Linux  Linux




Download other versions

Download x265 Encoder 3.5 from another mirror site  Win



Software License

Free software / FOSS (Free download and also Free and Open Source Software)



Supported operating systems

WinWindows MacMac OS LinuxLinux



More information and other downloads

x265 Encoder GUIs/Frontends:
Handbrake, Xvid4PSP, StaxRip, RipBot264, VidCoder, MEGUI, Xmedia Recode.



Version history / Release notes / Changelog


Version 3.5
+===========
+
+Release date - 16th March, 2021.
+
+New feature
+-----------
+1. Real-time VBV for ABR (Average BitRate) encodes in –pass 2 using :option:`--vbv-live-multi-pass`: Improves VBV compliance with no significant impact on coding efficiency.
+
+Enhancements to existing features
+---------------------------------
+1. Improved hist-based scene cut algorithm: Reduces false positives by leveraging motion and scene transition info.
+2. Support for RADL pictures at IDR scene cuts: Improves coding efficiency with no significant impact on performance.
+3. Bidirectional scene cut aware Frame Quantizer Selection: Saves bits than forward masking with no noticeable perceptual quality difference.
+
+API changes
+-----------
+1. Additions to x265_param structure to support the newly added features and encoder enhancements.
+2. New x265_param options :option:`--min-vbv-fullness` and :option:`--max-vbv-fullness` to control min and max VBV fullness.
+
+Bug fixes
+---------
+1. Incorrect VBV lookahead in :option:`--analysis-load` + :option:`--scale-factor`.
+2. Encoder hang when VBV is used with slices.
+3. QP spikes in the row-level VBV rate-control when WPP enabled.
+4. Encoder crash in :option:`--abr-ladder`.

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 from the Download links under Download and Download other versions!



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25 reviews, Showing 1 to 5 reviews


To be fair there are genuine gripes about how 'slower' this codec is, but that depends on the user's rig and compatibility issues. I use very modern hardware and still notice choppy decoding and encoding of hevc needs some setting to maximize its benefits. I know dozen of folks who have had major issues with h265 in Win10 so whingers and fan boys aside(he winks!) let's not get to hung up on things.

We had moans when Xvid was phased out and now h264 is apparently facing the same chop depending on whom you listen to, but nonetheless a great codec and one which I prefer to still use for simplicity.


Review by Peter on Mar 9, 2021 Version: 3.5 RC1 OS: Windows 8 64-bit Ease of use: 6/10 Functionality: 8/10 Value for money: 10/10 Overall: 6/10




to Not Gaz:

You are totally right.
As long as there's always rippers use x265 and no av1/vp9 shit bdrips in my hard disk, I'm totally fine with it.

I'm never a "silly fanboy", just need to say something 'cause of some UNFAIR reviews here.


Review by steve on Mar 9, 2021 Version: 3.4 OS: Windows 10 Ease of use: 10/10 Functionality: 10/10 Value for money: 10/10 Overall: 10/10




AV1 or V9 is sinking this into the dust along with its silly kiddy fanboys.

Review by Not Gaz on Mar 9, 2021 Version: 3.5 OS: Windows 10 64-bit Ease of use: 1/10 Functionality: 1/10 Value for money: 1/10 Overall: 1/10




to Gaz:

>A royal pain to set up or even decode for simple playback on a PC or tablet unless you like to see video frame freeze every micro second and the audio jump or go silent. You must have top spec hardware to take advantage of this codec.

Who the hell still don't have a device that can decode a HEVC video in 2020? Even my 3-years-old iGPU can decode 8K 60FPS HEVC video!


Review by steve on Mar 9, 2021 Version: 3.4 OS: Windows 10 Ease of use: 10/10 Functionality: 10/10 Value for money: 10/10 Overall: 10/10




I didn't know click on ratings can't let me write reviews previously, sorry for that.

I saw some critics, they are just rookies in my opinion.

Royalty fees are not the reason to blame a encoder, it just those IT giants' excuse for their stinginess, check the Wikipedia, software decoders are free and usage in non-physical contents are free, and arn't they supposed to pay the fees themselves instead of let our customers to pay?

And for speed and quality, x265 slow preset can beat x264 veryslow preset with same speed in terms of compress ratio. Ahh, rookies...


Review by Simon on Jan 24, 2021 Version: 3.4 OS: Windows 10 64-bit Ease of use: 10/10 Functionality: 10/10 Value for money: 10/10 Overall: 10/10


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