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  • Personnaliser en ajoutant son logo, sa bannière ou son image de fond

    5 septembre 2013, par

    Certains thèmes prennent en compte trois éléments de personnalisation : l’ajout d’un logo ; l’ajout d’une bannière l’ajout d’une image de fond ;

  • Submit bugs and patches

    13 avril 2011

    Unfortunately a software is never perfect.
    If you think you have found a bug, report it using our ticket system. Please to help us to fix it by providing the following information : the browser you are using, including the exact version as precise an explanation as possible of the problem if possible, the steps taken resulting in the problem a link to the site / page in question
    If you think you have solved the bug, fill in a ticket and attach to it a corrective patch.
    You may also (...)

  • Librairies et logiciels spécifiques aux médias

    10 décembre 2010, par

    Pour un fonctionnement correct et optimal, plusieurs choses sont à prendre en considération.
    Il est important, après avoir installé apache2, mysql et php5, d’installer d’autres logiciels nécessaires dont les installations sont décrites dans les liens afférants. Un ensemble de librairies multimedias (x264, libtheora, libvpx) utilisées pour l’encodage et le décodage des vidéos et sons afin de supporter le plus grand nombre de fichiers possibles. Cf. : ce tutoriel ; FFMpeg avec le maximum de décodeurs et (...)

Sur d’autres sites (8850)

  • avformat/mov : Avoid float usage in yuv_to_rgba()

    29 mai 2015, par Michael Niedermayer
    avformat/mov : Avoid float usage in yuv_to_rgba()

    This avoids the possibility for rounding/precision differences between platforms
    

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

  • Systematic artefacts from 10bit source

    8 janvier 2015, par user3729198

    When encoding from a 10 bit source file, compression / color artifacts appear. From what I can see, the problem lies in the "dc precision" command "-dc". I have tried different combinations and these are my results.

    On HD encodings ”-dc8” will give you nice clean solid colors without artifacts. But gradients and shading will suffer and be rougher.

    On HD encodings ”-dc11” will give you bad compression and color artifacts that look very systematic. But the Gradients look nice and smooth.

    On SD encodings ”-dc8” will give you nice clean solid colors without artifacts. But gradients and shading will suffer and be rougher.

    On SD encodings ”-dc9” will give you bad compression and color artifacts that look very systematic. But the Gradients look nice and smooth.

    Why is this ? And can it be fixed ? From other encoding software’s if I mimic the settings, all the encodings looks nice in all cases. So it seems that there is a bug in ffmpeg.

    Here is an example of the ffmpeg command I use :

    -i INPUT -vcodec mpeg2video -aspect {$aspectRatio} -r 25 -pix_fmt yuv422p -timecode_frame_start 0 -minrate 150000k -maxrate 150000k -b 150000k -intra -flags +cgop -flags2 +ivlc+non_linear_q -dc 11 -sc_threshold 1000000000 -qscale 1 -qmin 1 -qmax 12 -bufsize 47185920 -rc_init_occupancy 47185920 -rc_buf_aggressivity 0.25 -s {$resolution} -vframes {$frameDuration} -an OUTPUT

    If you want to try it yourself, make sure your source is 10bit, like Uncompressed 10 bit YUV.

  • r210enc.c : Simplify and never store more than 10 bits.

    27 décembre 2014, par Reimar Döffinger
    r210enc.c : Simplify and never store more than 10 bits.

    The r10k and avrp decoders would previously store 12 bit precision
    
for the blue channel, which is inconsistent and probably not a
    
desirable behaviour.
    
Now the 2 unused extra bits are set to 0.
    
This is possibly not ideal either as RGBA1010102 format has the same
    
layout but stores alpha in these bits, thus explicitly setting them
    
to 1 might be preferable.
    

    Signed-off-by : Reimar Döffinger <Reimar.Doeffinger@gmx.de>
    • [DH] libavcodec/r210enc.c

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