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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: 3.2 (details)
OS Support: Linux/Unix Mac OS Win32 Command Line Windows Vista Windows 7 Windows 8
License: Open Source
Last Updated:
Page Viewed: 66928 times

Links:

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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 3.2
  • Release Date: Sep 27, 2019
  • New features
    • 3-level hierarchical motion estimation using --hme and --hme-search.
    • New AQ mode (--aq-mode 4) with variance and edge information.
    • selective-sao to selectively enable SAO at slice level.
    • Enhancements to existing features
    • New implementation of --refine-mv with 3 refinement levels.
    • Encoder enhancements
    • Improved quality in the frames following dark scenes in ABR mode.
    • API changes
    • Additions to x265_param structure to support the newly added features --hme, --hme-search and selective-sao.
    Bug fixes
    • Fixed encoder crash with --zonefile during failures in encoder_open().
    • Fixed JSON11 build errors with HDR10+ on MacOS high sierra.
    • Signalling out of range scaling list data fixed.
    • Inconsistent output fix for 2-pass rate-control with cutree ON.
    Known issues
    • Build dependency on changeset cf37911 of SVT-HEVC.
View complete revision history

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