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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 ;

  • Les autorisations surchargées par les plugins

    27 avril 2010, par

    Mediaspip core
    autoriser_auteur_modifier() afin que les visiteurs soient capables de modifier leurs informations sur la page d’auteurs

  • Support de tous types de médias

    10 avril 2011

    Contrairement à beaucoup de logiciels et autres plate-formes modernes de partage de documents, MediaSPIP a l’ambition de gérer un maximum de formats de documents différents qu’ils soient de type : images (png, gif, jpg, bmp et autres...) ; audio (MP3, Ogg, Wav et autres...) ; vidéo (Avi, MP4, Ogv, mpg, mov, wmv et autres...) ; contenu textuel, code ou autres (open office, microsoft office (tableur, présentation), web (html, css), LaTeX, Google Earth) (...)

Sur d’autres sites (5422)

  • Re-sampling H264 video to reduce frame rate while maintaining high image quality

    31 mars 2016, par BrianTheLion

    Here’s the mplayer output for a video of interest :

    br@carina:/tmp$ mplayer foo.mov 
    
mplayer: Symbol `ff_codec_bmp_tags' has different size in shared object, consider re-linking
    
MPlayer 1.0rc4-4.5.2 (C) 2000-2010 MPlayer Team
    
mplayer: could not connect to socket
    
mplayer: No such file or directory
    
Failed to open LIRC support. You will not be able to use your remote control.
    

    
Playing foo.mov.
    
libavformat file format detected.
    
[lavf] stream 0: video (h264), -vid 0
    
[lavf] stream 1: audio (aac), -aid 0, -alang eng
    
VIDEO:  [H264]  1280x720  24bpp  59.940 fps  2494.2 kbps (304.5 kbyte/s)
    
==========================================================================
    
Opening video decoder: [ffmpeg] FFmpeg's libavcodec codec family
    
Selected video codec: [ffh264] vfm: ffmpeg (FFmpeg H.264)
    
==========================================================================
    
==========================================================================
    
Opening audio decoder: [faad] AAC (MPEG2/4 Advanced Audio Coding)
    
AUDIO: 44100 Hz, 2 ch, s16le, 128.0 kbit/9.07% (ratio: 15999->176400)
    
Selected audio codec: [faad] afm: faad (FAAD AAC (MPEG-2/MPEG-4 Audio))
    
==========================================================================
    
AO: [pulse] 44100Hz 2ch s16le (2 bytes per sample)
    
Starting playback...
    
Movie-Aspect is 1.78:1 - prescaling to correct movie aspect.
    
VO: [vdpau] 1280x720 => 1280x720 Planar YV12

    I’d like to use ffmpeg, mencoder, or some other command-line video transcoder to re-sample this video to a lower framerate without loss of image quality. That is, each frame should remain as crisp as possible.

    Attempts

    ffmpeg -i foo.mov -r 25 -vcodec copy bar.mov
    • The target frame rate — 25fps — is achieved but individual frames are "blocky."
    mencoder -nosound -ovc copy foo.mov -ofps 25 -o bar.mov
    • Videos are effectively un-viewable.

    Help !

    This seems like a simple enough use case. I’m very surprised that obvious things are not working. Is there something wrong with my approach ?

  • Re-sampling H264 video to reduce frame rate while maintaining high image quality

    4 mars 2019, par BrianTheLion

    Here’s the mplayer output for a video of interest :

    br@carina:/tmp$ mplayer foo.mov 
    
mplayer: Symbol `ff_codec_bmp_tags' has different size in shared object, consider re-linking
    
MPlayer 1.0rc4-4.5.2 (C) 2000-2010 MPlayer Team
    
mplayer: could not connect to socket
    
mplayer: No such file or directory
    
Failed to open LIRC support. You will not be able to use your remote control.
    

    
Playing foo.mov.
    
libavformat file format detected.
    
[lavf] stream 0: video (h264), -vid 0
    
[lavf] stream 1: audio (aac), -aid 0, -alang eng
    
VIDEO:  [H264]  1280x720  24bpp  59.940 fps  2494.2 kbps (304.5 kbyte/s)
    
==========================================================================
    
Opening video decoder: [ffmpeg] FFmpeg's libavcodec codec family
    
Selected video codec: [ffh264] vfm: ffmpeg (FFmpeg H.264)
    
==========================================================================
    
==========================================================================
    
Opening audio decoder: [faad] AAC (MPEG2/4 Advanced Audio Coding)
    
AUDIO: 44100 Hz, 2 ch, s16le, 128.0 kbit/9.07% (ratio: 15999->176400)
    
Selected audio codec: [faad] afm: faad (FAAD AAC (MPEG-2/MPEG-4 Audio))
    
==========================================================================
    
AO: [pulse] 44100Hz 2ch s16le (2 bytes per sample)
    
Starting playback...
    
Movie-Aspect is 1.78:1 - prescaling to correct movie aspect.
    
VO: [vdpau] 1280x720 => 1280x720 Planar YV12

    I’d like to use ffmpeg, mencoder, or some other command-line video transcoder to re-sample this video to a lower framerate without loss of image quality. That is, each frame should remain as crisp as possible.

    Attempts

    ffmpeg -i foo.mov -r 25 -vcodec copy bar.mov
    • The target frame rate — 25fps — is achieved but individual frames are "blocky."
    mencoder -nosound -ovc copy foo.mov -ofps 25 -o bar.mov
    • Videos are effectively un-viewable.

    Help !

    This seems like a simple enough use case. I’m very surprised that obvious things are not working. Is there something wrong with my approach ?

  • Evolution #4271 (Nouveau) : valider_url_distante => pouvoir déclarer des domaines distants et pas ...

    21 janvier 2019, par - Equipement

    Bonjour,

    La fonction valider_url_distante permet de déclarer des hosts distants :

    1. <span class="CodeRay"><span class="local-variable">$known_hosts</span> = pipeline(<span class="string"><span class="delimiter">'</span><span class="content">declarer_hosts_distants</span><span class="delimiter">'</span></span>, <span class="local-variable">$known_hosts</span>);
      2. 

    2. </span>
      3. 

    Télécharger

    C’est très bien, mais avec plusieurs centaines de hosts à déclarer (dont la liste varie dans le temps), cela devient compliqué à gérer.

    Serait-il possible d’avoir, en plus, la possibilité de déclarer des domaines distants ?

    Une première piste serait de pouvoir déclarer .example.com dans le pipeline pour inclure tous les *.example.com au lieu des les énumérer un par un.

    Une seconde piste consisterait à s’inspirer de la function need_proxy (via une constante avec la même syntaxe que pour le http_noproxy) :

    // Pour mémoire code actuel à conserver ...

    1. <span class="CodeRay">    <span class="local-variable">$is_known_host</span> = <span class="predefined-constant">false</span>;
      2. 

    2.     <span class="keyword">foreach</span> (<span class="local-variable">$known_hosts</span> <span class="keyword">as</span> <span class="local-variable">$known_host</span>) {
      3. 

    3.         <span class="local-variable">$parse_known</span> = <span class="predefined">parse_url</span>(<span class="local-variable">$known_host</span>);
      4. 

    4.         <span class="keyword">if</span> (<span class="local-variable">$parse_known</span>
      5. 

    5.           <span class="keyword">and</span> <span class="predefined">strtolower</span>(<span class="local-variable">$parse_known</span>[<span class="string"><span class="delimiter">'</span><span class="content">host</span><span class="delimiter">'</span></span>]) === <span class="predefined">strtolower</span>(<span class="local-variable">$parsed_url</span>[<span class="string"><span class="delimiter">'</span><span class="content">host</span><span class="delimiter">'</span></span>])) {
      6. 

    6.             <span class="local-variable">$is_known_host</span> = <span class="predefined-constant">true</span>;
      7. 

    7.             <span class="keyword">break</span>;
      8. 

    8.         }
      9. 

    9.     }
      10. 

    10. </span>
      11. 

    Télécharger

    // ... que l’on pourrait faire suivre de ce code (complètement inspiré de function need_proxy) :

    1. <span class="CodeRay">    <span class="keyword">if</span> (!<span class="local-variable">$is_known_host</span>) {
      2. 

    2.                 <span class="local-variable">$known_domaines</span> = _DECLARER_DOMAINES_DISTANTS;
      3. 

    3.  
      4. 

    4.                 <span class="local-variable">$known_domaines</span> = <span class="predefined">str_replace</span>(<span class="string"><span class="delimiter">"</span><span class="char">\n</span><span class="delimiter">"</span></span>, <span class="string"><span class="delimiter">"</span><span class="content"> </span><span class="delimiter">"</span></span>, <span class="local-variable">$known_domaines</span>);
      5. 

    5.                 <span class="local-variable">$known_domaines</span> = <span class="predefined">str_replace</span>(<span class="string"><span class="delimiter">"</span><span class="char">\r</span><span class="delimiter">"</span></span>, <span class="string"><span class="delimiter">"</span><span class="content"> </span><span class="delimiter">"</span></span>, <span class="local-variable">$known_domaines</span>);
      6. 

    6.                 <span class="local-variable">$known_domaines</span> = <span class="string"><span class="delimiter">"</span><span class="content"> </span><span class="local-variable">$known_domaines</span><span class="content"> </span><span class="delimiter">"</span></span>;
      7. 

    7.                 <span class="local-variable">$domain</span> = <span class="predefined">strtolower</span>(<span class="local-variable">$parsed_url</span>[<span class="string"><span class="delimiter">'</span><span class="content">host</span><span class="delimiter">'</span></span>]);
      8. 

    8.  
      9. 

    9.                 <span class="keyword">if</span> (<span class="predefined">strpos</span>(<span class="local-variable">$known_domaines</span>, <span class="string"><span class="delimiter">"</span><span class="content"> </span><span class="local-variable">$domain</span><span class="content"> </span><span class="delimiter">"</span></span>) !== <span class="predefined-constant">false</span>){
      10. 

    10.                     <span class="local-variable">$is_known_host</span> = <span class="predefined-constant">true</span>;
      11. 

    11.                 }
      12. 

    12.  
      13. 

    13.                 <span class="keyword">while</span> (<span class="predefined">strpos</span>(<span class="local-variable">$domain</span>, <span class="string"><span class="delimiter">'</span><span class="content">.</span><span class="delimiter">'</span></span>) !== <span class="predefined-constant">false</span>) {
      14. 

    14.                         <span class="local-variable">$domain</span> = <span class="predefined">explode</span>(<span class="string"><span class="delimiter">'</span><span class="content">.</span><span class="delimiter">'</span></span>, <span class="local-variable">$domain</span>);
      15. 

    15.                         <span class="predefined">array_shift</span>(<span class="local-variable">$domain</span>);
      16. 

    16.                         <span class="local-variable">$domain</span> = <span class="predefined">implode</span>(<span class="string"><span class="delimiter">'</span><span class="content">.</span><span class="delimiter">'</span></span>, <span class="local-variable">$domain</span>);
      17. 

    17.  
      18. 

    18.                         <span class="keyword">if</span> (<span class="predefined">strpos</span>(<span class="local-variable">$known_domaines</span>, <span class="string"><span class="delimiter">"</span><span class="content"> .</span><span class="local-variable">$domain</span><span class="content"> </span><span class="delimiter">"</span></span>) !== <span class="predefined-constant">false</span>) {
      19. 

    19.                             <span class="local-variable">$is_known_host</span> = <span class="predefined-constant">true</span>;
      20. 

    20.                         }
      21. 

    21.                 }
      22. 

    22.         } 
      23. 

    23. </span>
      24. 

    Télécharger

    Cordialement
    Equipement

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