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  • Automated installation script of MediaSPIP

    25 avril 2011, par

    To overcome the difficulties mainly due to the installation of server side software dependencies, an "all-in-one" installation script written in bash was created to facilitate this step on a server with a compatible Linux distribution.
    You must have access to your server via SSH and a root account to use it, which will install the dependencies. Contact your provider if you do not have that.
    The documentation of the use of this installation script is available here.
    The code of this (...)

  • Encoding and processing into web-friendly formats

    13 avril 2011, par

    MediaSPIP automatically converts uploaded files to internet-compatible formats.
    Video files are encoded in MP4, Ogv and WebM (supported by HTML5) and MP4 (supported by Flash).
    Audio files are encoded in MP3 and Ogg (supported by HTML5) and MP3 (supported by Flash).
    Where possible, text is analyzed in order to retrieve the data needed for search engine detection, and then exported as a series of image files.
    All uploaded files are stored online in their original format, so you can (...)

  • Changer son thème graphique

    22 février 2011, par

    Le thème graphique ne touche pas à la disposition à proprement dite des éléments dans la page. Il ne fait que modifier l’apparence des éléments.
    Le placement peut être modifié effectivement, mais cette modification n’est que visuelle et non pas au niveau de la représentation sémantique de la page.
    Modifier le thème graphique utilisé
    Pour modifier le thème graphique utilisé, il est nécessaire que le plugin zen-garden soit activé sur le site.
    Il suffit ensuite de se rendre dans l’espace de configuration du (...)

Sur d’autres sites (8854)

  • Revision 5e935126a6 : Add intra complexity and brightness weight to first pass. The aim of this patch

    4 novembre 2014, par Paul Wilkins

    Changed Paths :
     Modify /vp9/encoder/vp9_firstpass.c


     Modify /vp9/encoder/vp9_firstpass.h



    Add intra complexity and brightness weight to first pass.

    The aim of this patch is to apply a positive weighting to
    frames that have a significant number of blocks that are
    of low spatial complexity and are dark. The rationale behind
    this is that artifacts tend to be more visible in such frames.

    In this patch the weight is only applied in regard to the distribution
    of bits between frames. Hence if all the frames share similar
    characteristics (as is the case for most of our short test clips) there
    will be little or no net effect.

    However, the effect can be seen on some longer form test content.

    For example Tears of steel baseline test :
    2323.09 Kbit/s opsnr 39.915 ssim 74.729
    With this patch :-
    2213.34 Kbit/s opsnr 39.963 ssim 74.808
    (Sligtly better metrics and about 5% smaller)

    The weighting may well need some further tuning along side changes
    to the aq modes.

    Change-Id : Ieced379bca03938166ab87b2b97f55d94948904c

  • dvenc : fix 2x4x8 (interlaced) weight table

    30 janvier 2015, par Christophe Gisquet
    dvenc : fix 2x4x8 (interlaced) weight table

    Since the decoder has been fixed to output something similar to
    
other implementations, the encoder weight table needed this fix.
    

    Reference PSNR values on a progressive sequence (from tiny_psnr)
    
from a chained encoding and decoding :
    
Full progressive : stddev :    0.74 PSNR : 50.69 MAXDIFF :   19
    
Before :           stddev :    1.43 PSNR : 44.97 MAXDIFF :   17
    
This patch :       stddev :    0.76 PSNR : 50.44 MAXDIFF :   14
    

    Signed-off-by : Michael Niedermayer <michaelni@gmx.at>
    • [DH] libavcodec/dvenc.c

  • avcodec/mips : MSA (MIPS-SIMD-Arch) optimizations for H264 lpf and weight/biweight...

    27 avril 2015, par Shivraj Patil
    avcodec/mips : MSA (MIPS-SIMD-Arch) optimizations for H264 lpf and weight/biweight functions

    Reviewed-by : Nedeljko Babic <Nedeljko.Babic@imgtec.com>
    
Signed-off-by : Michael Niedermayer <michaelni@gmx.at>
    • [DH] libavcodec/h264dsp.c
    • [DH] libavcodec/h264dsp.h
    • [DH] libavcodec/mips/Makefile
    • [DH] libavcodec/mips/h264dsp_init_mips.c
    • [DH] libavcodec/mips/h264dsp_mips.h
    • [DH] libavcodec/mips/h264dsp_msa.c
    • [DH] libavutil/mips/generic_macros_msa.h

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