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Thread: h264 (x264) vs Theora

  1. #61
    Join Date
    Nov 2008
    London, UK
    Ubuntu 12.04 Precise Pangolin

    Exclamation Re: h264 (x264) vs Theora

    (I made work the tool with latest build of libav* libraries).

    Here are the charts for the PSNR and SSIM for this file:
    Video size is 640x272
    It has been encoded with default parameters, baseline profile for x264 and default settings with libtheora 1.1. Both of them 2 passes (first pass turbo).
    Stats are the average each 25 frames.


    As you can see both stats are in total favour of x264. The SSIM is even greater.
    I'll post some HD video stats later on.


  2. #62
    Join Date
    Sep 2009
    Ubuntu 10.04 Lucid Lynx

    Re: h264 (x264) vs Theora

    Quote Originally Posted by Emanuele_Z View Post
    As you can see both stats are in total favour of x264. The SSIM is even greater.
    And this is only H.264 Baseline Profile, i.e. the bottom end of H.264 compression efficiency.

    Here's an example from the top end: The new Wall Street movie trailer, 1280x544, encoded at 1800 kb/s (average bitrate) with High Profile settings.
    Size: 20 MB (no audio)
    SHA1: 9568d938101d9faeead95a5c766d296f8031f81b

    The source file (70 MB) can be downloaded from Apple's website:
    wget -U "QuickTime/7.6.5"
    I did not make a Theora version, but my guess is that the compression artifacts at 1800 kb/s will totally destroy the video.
    Last edited by VertexPusher; February 21st, 2010 at 06:12 PM.

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