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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 codecs 2013
    See all MSU Video Codec Comparisons

    MSU video codecs comparisons resources:


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    Last updated: 10-March-2011

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    Project sponsored by YUVsoft Corp.

    Project supported by MSU Graphics & Media Lab

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