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    Highest Quality

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    Lowest Bit Rate

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    The Most Efficient HEVC (H.265) Video Encoder

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    Optimum Encoding for All Devices


x265 is an open-source project and free application library for encoding video streams into the H.265/High Efficiency Video Coding (HEVC) format. x265 is available to anyone under the terms of the GNU GPL 2 license. x265 is also available to commercial companies who wish to distribute x265 without the open-source restictions that the GPL license imposes.

The source code is freely available for personal or private use.

Project Goals

  • Build on the x264 codec (widely recognized as the highest quality H.264 codec implementation) to create the best HEVC (H.265) video encoder in the world
    - Offer the highest possible quality at any given bit rate
    - Offer the lowest possible bit rate for a given quality level
  • Deliver the world’s fastest and most computationally efficient HEVC encoder
    - Highest encoding and decoding speed for any hardware configuration
    - Lowest resource utilization for real-time encoding
  • Deliver industry leading features and developer support
  • Achieve the widest possible adoption from the open source community and from leading web video services, software developers, video hardware and software developers, semiconductor manufacturers and academics.
    - Free for personal or internal use, or for any use compliant with the terms of the GPL 2 license
    - Lower cost for commercial users versus competing proprietary HEVC codecs

Get Involved!

  • Developers can access the source code and make contributions
  • x265 is commercially funded. If your company would like to help sponsor the world’s greatest HEVC implementation please contact us
  • For commercial licensing questions, please contact our licensing team (license @ x265.com)