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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: 2.7 (details)
OS Support: Linux/Unix Mac OS Win32 Command Line Windows Vista Windows 7 Windows 8
License: Open Source
Last Updated:
Page Viewed: 45763 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 2.7
  • Release Date: Feb 22, 2018
  • New features
    • :option:`--gop-lookahead` can be used to extend the gop boundary(set by --keyint). The GOP will be extended, if a scene-cut frame is found within this many number of frames.
    • Support for RADL pictures added in x265. :option:`--radl` can be used to decide number of RADL pictures preceding the IDR picture.
    • Encoder enhancements
    • Moved from YASM to NASM assembler. Supports NASM assembler version 2.13 and greater.
    • Enable analysis save and load in a single run. Introduces two new cli options --analysis-save <filename> and --analysis-load <filename>.
    • Comply to HDR10+ LLC specification.
    • Reduced x265 build time by more than 50% by re-factoring ipfilter.asm.
    Bug fixes
    • Fixed inconsistent output issue in deblock filter and --const-vbv.
    • Fixed Mac OS build warnings.
    • Fixed inconsistency in pass-2 when weightp and cutree are enabled.
    • Fixed deadlock issue due to dropping of BREF frames, while forcing slice types through qp file.
View complete revision history

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