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x265

x265 is a free and open source encoding library and application for encoding HEVC/H.265 video files
Author/Publisher:
Language: English
Ease of use: Not Rated
Latest Version: 2.9 (details)
OS Support: Linux/Unix Mac OS Win32 Command Line Windows Vista Windows 7 Windows 8
License: Open Source
Last Updated:
Page Viewed: 51693 times

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Description:

x265 is a free and open source encoding library and application for encoding HEVC/H.265 video files.

Features:

  • Provides next-generation compression and codec.
  • Fast and excellent quality.
  • Completly free and libre software, ensuring freedom for everyone.
  • The APIs are similar to x264 APIs

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



Categories:

OS Compatibility:

Linux/Unix/Mac OS/Win32 Command Line/Windows Vista/Windows 7/Windows 8

Revision History:

Version 2.9
  • Release Date: Oct 8, 2018
  • New features
    Support for chunked encoding

    :option:`--chunk-start and --chunk-end` Frames preceding first frame of chunk in display order will be encoded, however, they will be discarded in the bitstream. Frames following last frame of the chunk in display order will be used in taking lookahead decisions, but, they will not be encoded. This feature can be enabled only in closed GOP structures. Default disabled.

    Support for HDR10+ version 1 SEI messages.

    Encoder enhancements
    Create API function for allocating and freeing x265_analysis_data.
    CEA 608/708 support: Read SEI messages from text file and encode it using userSEI message.
    Bug fixes
    Disable noise reduction when vbv is enabled.
    Support minLuma and maxLuma values changed by the commandline.
View complete revision history

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