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Options Analysis of MPEG-4 AVC/H.264 Codec x264

MSU Graphics & Media Lab (Video Group)

Project head: Dr. Dmitriy Vatolin
Testing, charts, analysis: Alexander Parshin, Vladimir Popov, Kira Ragulina

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x264 Codec


We have analyzed x264 (version r938) - one of the best codecs of MPEG-4 AVC/H.264 video coding standard. This codec demonstrates great results of both quality and speed of encoding according to our previous MPEG-4 AVC/H.264 codec comparisons. Number of codec options were analysed to find their best values and codec's optimal presets.

The following options were considered:

  • Macroblocks partitions selection (--partitions)
  • Number of B-frames (--bframes)
  • Number of reference frames (--ref)
  • Motion Estimation method (--me)
  • Algorithm of subpixel compensation usage (--subme)
  • Mixing of predictions from different frames (--mixed-refs)
  • Weighted predictions in B-frames (--weightb)

  • Report Contents


    The report contain the following sections:

  • List of optimal presets for different encoding speed
  • Codec options analysis using colored point clouds
  • Codec options analysis using speed/quality tradeoff
  • Codec options analysis using convex-hull elumination
  • Presets point cloud
    Presets quality and speed. Each point is tested preset. X axis is encoding speed, Y axis is average bitrate for the same quality.

    Main Results


    Main results of this work are the following:

  • List of optimal presets. Those presets can be used for better encoding of your video.
  • Recommendations for presets usage for different encoding speed.
  • Conclusions about methods implementations efficiency related to other implemented methods.
  • We offer commercial evaluations of codec's parameters set similar to this one. Write us an e-mail for more details.


    Download


  • x264 options analysis, PDF, EN, 1.73 MB

  • Thanks


    Special thanks to the following contributors of this work

    Intel RFBR

    Contact Information


    Call for cloud encoding comparison participation 2020
    See all MSU Video Codecs Comparisons

    MSU video codecs comparisons resources:


    Other materials


    Video resources:

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    Last updated: 26-March-2020

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    Server size: 8069 files, 1215Mb (Server statistics)

    Project updated by
    Server Team and MSU Video Group


    Project sponsored by YUVsoft Corp.

    Project supported by MSU Graphics & Media Lab