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  • Le profil des utilisateurs

    12 avril 2011, par

    Chaque utilisateur dispose d’une page de profil lui permettant de modifier ses informations personnelle. Dans le menu de haut de page par défaut, un élément de menu est automatiquement créé à l’initialisation de MediaSPIP, visible uniquement si le visiteur est identifié sur le site.
    L’utilisateur a accès à la modification de profil depuis sa page auteur, un lien dans la navigation "Modifier votre profil" est (...)

  • Configurer la prise en compte des langues

    15 novembre 2010, par

    Accéder à la configuration et ajouter des langues prises en compte
    Afin de configurer la prise en compte de nouvelles langues, il est nécessaire de se rendre dans la partie "Administrer" du site.
    De là, dans le menu de navigation, vous pouvez accéder à une partie "Gestion des langues" permettant d’activer la prise en compte de nouvelles langues.
    Chaque nouvelle langue ajoutée reste désactivable tant qu’aucun objet n’est créé dans cette langue. Dans ce cas, elle devient grisée dans la configuration et (...)

  • Sélection de projets utilisant MediaSPIP

    29 avril 2011, par

    Les exemples cités ci-dessous sont des éléments représentatifs d’usages spécifiques de MediaSPIP pour certains projets.
    Vous pensez avoir un site "remarquable" réalisé avec MediaSPIP ? Faites le nous savoir ici.
    Ferme MediaSPIP @ Infini
    L’Association Infini développe des activités d’accueil, de point d’accès internet, de formation, de conduite de projets innovants dans le domaine des Technologies de l’Information et de la Communication, et l’hébergement de sites. Elle joue en la matière un rôle unique (...)

Sur d’autres sites (6030)

  • Music Video Idiosyncrasies

    18 juin 2011, par Multimedia Mike — General

    So I’m watching a fairly recent music video for a song named "XXXO" from an artist named M.I.A. when I’m suddenly assaulted by this imagery :



    ... and I enter nervous convulsions. You see, while this might seem to be an odd video effect to the casual viewer, to a multimedia hacker, it appears to be deliberately antagonistic. To anyone who has written a video codec, this scene looks like an entire casserole of video bugs, combining creeping plane offsets errors, chroma problems, and interlacing havoc. The craziest part is to realize that this is probably some kind of standard video effect / filter type. Upon a repeat viewing, I realized that the entire video sort of looks like an amateur video editor’s first week using video software.

    Elsewhere in the video, a YouTube-style video frame vortex highlights the proceedings. I guess I need to come to terms with the fact that the ubiquitous player frame is just part of the digital Zeitgeist now :



    Vintage Video Strangeness
    I’m a long-time music video junkie but I have a tendency of examining them entirely too closely. I first saw Paula Abdul’s video for "Cold-Hearted" when I was just starting to understand multimedia technology and how it interacted with emerging home computers. Imagine how confused I was when I tried to make sense of the actions performed by our eMaestro "Chuck" whom Paula has instructed to "hit it". First, he hits a key followed by 3 quick strikes on a second key :



    Then, the "start music" action is apparently bound to a particular key on the electronic keyboard :



    Which kicks off the electronic metronome on the computer. Each identical-sounding beat quizzically maps to a different frequency transform :



    a one...

    and a two...

    and a three...

    I had no trouble believing things up to this point. But even though I didn’t understand what was going on with that frequency transform, I knew that it must have had something to do with the audio. And if the audio was the same, the visualization ought to be the same. Though, to be fair, I will concede that the first and third ticks pictured bear some mutual resemblance.

    Anyway, the software is probably real even if the keyboard interaction was stylized. Can anyone identify the software ? What about the computer ? This is perhaps the best view the video gives us :



    So, remember, don’t base your understanding of technology — or anything, really — on stylized media representations. Don’t even get me started on the movie "Sneakers." That had me confused about cryptography and computer security for many years.

  • ffmpeg image to video sequence stops after 10

    18 mai 2012, par Jim

    Probably a fast anwser, but my first time trying to do this. I have 77 jpeg pictures, I have renamed them to be 000.jpg - 076.jpg. The next step is using ffmpeg and here is my command statement :

    ffmpeg -f image2 -r .1 -i %d.jpg -r 25 test.avi

    It creates an avi with 10 images for 10seconds each, why only 10 ? I've tried other iterations of %d.jpg in the ffmpeg command with no success.

    thanks for the help all !

    -Jim

    Here is the listing of the directory with the images :

    ls -l
    
total 77472
    
-rwxr-xr-x 1 jim jim 2329065 May 17 16:31 000.jpg
    
-rwxr-xr-x 1 jim jim  716563 May 17 16:31 001.jpg
    
-rwxr-xr-x 1 jim jim  716626 May 17 16:31 002.jpg
    
-rwxr-xr-x 1 jim jim  726686 May 17 16:31 003.jpg
    
-rwxr-xr-x 1 jim jim  739312 May 17 16:31 004.jpg
    
-rwxr-xr-x 1 jim jim  720249 May 17 16:31 005.jpg
    
-rwxr-xr-x 1 jim jim  666757 May 17 16:31 006.jpg
    
-rwxr-xr-x 1 jim jim  656259 May 17 16:31 007.jpg
    
-rwxr-xr-x 1 jim jim  664960 May 17 16:31 008.jpg
    
-rwxr-xr-x 1 jim jim  740801 May 17 16:31 009.jpg
    
-rwxr-xr-x 1 jim jim  882502 May 17 16:31 010.jpg
    
-rwxr-xr-x 1 jim jim  631117 May 17 16:31 011.jpg
    
-rwxr-xr-x 1 jim jim  730331 May 17 16:31 018.jpg
    
-rwxr-xr-x 1 jim jim  725132 May 17 16:31 019.jpg
    
-rwxr-xr-x 1 jim jim  729626 May 17 16:31 020.jpg
    
-rwxr-xr-x 1 jim jim  731980 May 17 16:31 021.jpg
    
-rwxr-xr-x 1 jim jim  671597 May 17 16:31 022.jpg
    
-rwxr-xr-x 1 jim jim  681978 May 17 16:31 023.jpg
    
-rwxr-xr-x 1 jim jim  686600 May 17 16:31 024.jpg
    
-rwxr-xr-x 1 jim jim  675316 May 17 16:31 025.jpg
    
-rwxr-xr-x 1 jim jim  681826 May 17 16:31 026.jpg
    
-rwxr-xr-x 1 jim jim  740998 May 17 16:31 027.jpg
    
-rwxr-xr-x 1 jim jim  568480 May 17 16:31 028.jpg
    
-rwxr-xr-x 1 jim jim  747400 May 17 16:31 029.jpg
    
-rwxr-xr-x 1 jim jim  630995 May 17 16:31 030.jpg
    
-rwxr-xr-x 1 jim jim  689926 May 17 16:31 031.jpg
    
-rwxr-xr-x 1 jim jim  685054 May 17 16:31 032.jpg
    
-rwxr-xr-x 1 jim jim  710620 May 17 16:31 033.jpg
    
-rwxr-xr-x 1 jim jim  658365 May 17 16:31 034.jpg
    
-rwxr-xr-x 1 jim jim  657037 May 17 16:31 035.jpg
    
-rwxr-xr-x 1 jim jim  772135 May 17 16:31 036.jpg
    
-rwxr-xr-x 1 jim jim  741759 May 17 16:31 037.jpg
    
-rwxr-xr-x 1 jim jim  807470 May 17 16:31 038.jpg
    
-rwxr-xr-x 1 jim jim  748423 May 17 16:31 039.jpg
    
-rwxr-xr-x 1 jim jim  712377 May 17 16:31 040.jpg
    
-rwxr-xr-x 1 jim jim  715804 May 17 16:31 041.jpg
    
-rwxr-xr-x 1 jim jim  701025 May 17 16:31 042.jpg
    
-rwxr-xr-x 1 jim jim  759446 May 17 16:31 043.jpg
    
-rwxr-xr-x 1 jim jim  621801 May 17 16:31 044.jpg
    
-rwxr-xr-x 1 jim jim  720843 May 17 16:31 045.jpg
    
-rwxr-xr-x 1 jim jim  704002 May 17 16:31 046.jpg
    
-rwxr-xr-x 1 jim jim  696075 May 17 16:31 047.jpg
    
-rwxr-xr-x 1 jim jim  723685 May 17 16:31 048.jpg
    
-rwxr-xr-x 1 jim jim  732332 May 17 16:31 049.jpg
    
-rwxr-xr-x 1 jim jim  747235 May 17 16:31 050.jpg
    
-rwxr-xr-x 1 jim jim  883655 May 17 16:31 051.jpg
    
-rwxr-xr-x 1 jim jim 1750723 May 17 16:31 052.jpg
    
-rwxr-xr-x 1 jim jim 1002588 May 17 16:31 053.jpg
    
-rwxr-xr-x 1 jim jim  540666 May 17 16:31 054.jpg
    
-rwxr-xr-x 1 jim jim 1876002 May 17 16:31 055.jpg
    
-rwxr-xr-x 1 jim jim 1893761 May 17 16:31 056.jpg
    
-rwxr-xr-x 1 jim jim 1979442 May 17 16:31 057.jpg
    
-rwxr-xr-x 1 jim jim 1766249 May 17 16:31 058.jpg
    
-rwxr-xr-x 1 jim jim 2085989 May 17 16:31 059.jpg
    
-rwxr-xr-x 1 jim jim  883871 May 17 16:31 060.jpg
    
-rwxr-xr-x 1 jim jim  755714 May 17 16:31 061.jpg
    
-rwxr-xr-x 1 jim jim  797146 May 17 16:31 062.jpg
    
-rwxr-xr-x 1 jim jim 2431531 May 17 16:31 065.jpg
    
-rwxr-xr-x 1 jim jim 2413333 May 17 16:31 066.jpg
    
-rwxr-xr-x 1 jim jim 2449278 May 17 16:31 067.jpg
    
-rwxr-xr-x 1 jim jim 2458183 May 17 16:31 068.jpg
    
-rwxr-xr-x 1 jim jim 2514419 May 17 16:31 069.jpg
    
-rwxr-xr-x 1 jim jim 2477737 May 17 16:31 070.jpg
    
-rwxr-xr-x 1 jim jim 2471347 May 17 16:31 071.jpg
    
-rwxr-xr-x 1 jim jim 2384936 May 17 16:31 072.jpg
    
-rwxr-xr-x 1 jim jim 2459983 May 17 16:31 073.jpg
    
-rwxr-xr-x 1 jim jim 2501286 May 17 16:31 074.jpg
    
-rwxr-xr-x 1 jim jim 2367710 May 17 16:31 075.jpg
    
-rwxr-xr-x 1 jim jim 2455564 May 17 16:31 076.jpg

    FFMPEG Command and OUTPUT :

    ffmpeg -v verbose -f image2 -r .1 -i %03d.jpg -r 25 test.avi
    
ffmpeg version 0.8.1-4:0.8.1-0ubuntu1, Copyright (c) 2000-2011 the Libav developers
    
  built on Mar 22 2012 05:09:06 with gcc 4.6.3
    
  configuration: --extra-version='4:0.8.1-0ubuntu1' --arch=amd64 --prefix=/usr --libdir=/usr/lib/x86_64-linux-gnu --enable-vdpau --enable-bzlib --enable-libgsm --enable-libschroedinger --enable-libspeex --enable-libtheora --enable-libvorbis --enable-pthreads --enable-zlib --enable-libvpx --enable-runtime-cpudetect --enable-libfreetype --enable-vaapi --enable-gpl --enable-postproc --enable-swscale --enable-x11grab --enable-libdc1394 --shlibdir=/usr/lib/x86_64-linux-gnu --enable-shared --disable-static
    
  avutil      configuration: --extra-version='4:0.8.1ubuntu1+medibuntu1' --arch=amd64 --prefix=/usr --libdir=/usr/lib/x86_64-linux-gnu --enable-vdpau --enable-bzlib --enable-libgsm --enable-libschroedinger --enable-libspeex --enable-libtheora --enable-libvorbis --enable-pthreads --enable-zlib --enable-libvpx --enable-runtime-cpudetect --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-version3 --enable-libfreetype --enable-vaapi --enable-libopenjpeg --enable-libfaac --enable-nonfree --enable-gpl --enable-postproc --enable-swscale --enable-x11grab --enable-libdirac --enable-libmp3lame --enable-librtmp --enable-libx264 --enable-libxvid --enable-libopencore-amrnb --enable-version3 --enable-libopencore-amrwb --enable-version3 --enable-libvo-aacenc --enable-version3 --enable-libvo-amrwbenc --enable-version3 --enable-libdc1394 --shlibdir=/usr/lib/x86_64-linux-gnu --enable-shared --disable-static
    
  avcodec     configuration: --extra-version='4:0.8.1ubuntu1+medibuntu1' --arch=amd64 --prefix=/usr --libdir=/usr/lib/x86_64-linux-gnu --enable-vdpau --enable-bzlib --enable-libgsm --enable-libschroedinger --enable-libspeex --enable-libtheora --enable-libvorbis --enable-pthreads --enable-zlib --enable-libvpx --enable-runtime-cpudetect --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-version3 --enable-libfreetype --enable-vaapi --enable-libopenjpeg --enable-libfaac --enable-nonfree --enable-gpl --enable-postproc --enable-swscale --enable-x11grab --enable-libdirac --enable-libmp3lame --enable-librtmp --enable-libx264 --enable-libxvid --enable-libopencore-amrnb --enable-version3 --enable-libopencore-amrwb --enable-version3 --enable-libvo-aacenc --enable-version3 --enable-libvo-amrwbenc --enable-version3 --enable-libdc1394 --shlibdir=/usr/lib/x86_64-linux-gnu --enable-shared --disable-static
    
  libavutil    51. 22. 1 / 51. 22. 1
    
  libavcodec   53. 35. 0 / 53. 35. 0
    
  libavformat  53. 21. 0 / 53. 21. 0
    
  libavdevice  53.  2. 0 / 53.  2. 0
    
  libavfilter   2. 15. 0 /  2. 15. 0
    
  libswscale    2.  1. 0 /  2.  1. 0
    
  libpostproc  52.  0. 0 / 52.  0. 0
    
This program is not developed anymore and is only provided for compatibility. Use avconv instead (see Changelog for the list of incompatible changes).
    
[image2 @ 0x1bef9c0] max_analyze_duration reached
    

    
Seems stream 0 codec frame rate differs from container frame rate: 0.10 (1/10) -> 0.50 (1/2)
    
Input #0, image2, from '%03d.jpg':
    
  Duration: 00:02:00.00, start: 0.000000, bitrate: N/A
    
    Stream #0.0: Video: mjpeg, yuvj440p, 1920x2560, 0.10 fps, 0.50 tbr, 0.10 tbn, 0.10 tbc
    
File 'test.avi' already exists. Overwrite ? [y/N] y
    
Incompatible pixel format 'yuvj440p' for codec 'mpeg4', auto-selecting format 'yuv420p'
    
[buffer @ 0x1bf0100] w:1920 h:2560 pixfmt:yuvj440p
    
[avsink @ 0x1bf13c0] auto-inserting filter 'auto-inserted scaler 0' between the filter 'src' and the filter 'out'
    
[scale @ 0x1bf1ae0] w:1920 h:2560 fmt:yuvj440p -> w:1920 h:2560 fmt:yuv420p flags:0x4
    
Output #0, avi, to 'test.avi':
    
  Metadata:
    
    ISFT            : Lavf53.21.0
    
    Stream #0.0: Video: mpeg4, yuv420p, 1920x2560, q=2-31, 200 kb/s, 25 tbn, 25 tbc
    
Stream mapping:
    
  Stream #0.0 -> #0.0
    
Press ctrl-c to stop encoding
    
[buffer @ 0x1bf0100] Changing frame properties on the fly is not supported.
    
    Last message repeated 10 times
    
frame=    1 fps=  0 q=5.7 Lsize=      97kB time=0.04 bitrate=19823.2kbits/s    
    
video:91kB audio:0kB global headers:0kB muxing overhead 6.106282%

    Now test.avi is only 99Kbs and doesn't play anything.

  • Anomalie #2732 : interclassement table spip_urls

    7 juin 2012, par denisb -

    suite... spip_meta n’est pas mise à jour sans doute à cause du spip_connect(’dump’) ; qui de toute façon ne servirait pas à grand chose parce que sql_showtable() ne ramène pas les collations de colonne (tout ça dans plugins-dist/dump/inc/dump.php)

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