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Autres articles (82)

  • Amélioration de la version de base

    13 septembre 2013

    Jolie sélection multiple
    Le plugin Chosen permet d’améliorer l’ergonomie des champs de sélection multiple. Voir les deux images suivantes pour comparer.
    Il suffit pour cela d’activer le plugin Chosen (Configuration générale du site > Gestion des plugins), puis de configurer le plugin (Les squelettes > Chosen) en activant l’utilisation de Chosen dans le site public et en spécifiant les éléments de formulaires à améliorer, par exemple select[multiple] pour les listes à sélection multiple (...)

  • Mise à jour de la version 0.1 vers 0.2

    24 juin 2013, par

    Explications des différents changements notables lors du passage de la version 0.1 de MediaSPIP à la version 0.3. Quelles sont les nouveautés
    Au niveau des dépendances logicielles Utilisation des dernières versions de FFMpeg (>= v1.2.1) ; Installation des dépendances pour Smush ; Installation de MediaInfo et FFprobe pour la récupération des métadonnées ; On n’utilise plus ffmpeg2theora ; On n’installe plus flvtool2 au profit de flvtool++ ; On n’installe plus ffmpeg-php qui n’est plus maintenu au (...)

  • Contribute to documentation

    13 avril 2011

    Documentation is vital to the development of improved technical capabilities.
    MediaSPIP welcomes documentation by users as well as developers - including : critique of existing features and functions articles contributed by developers, administrators, content producers and editors screenshots to illustrate the above translations of existing documentation into other languages
    To contribute, register to the project users’ mailing (...)

Sur d’autres sites (10621)

  • meaning of ffmpeg filter option values for modifying contrast/brightness/gamma

    5 septembre 2016, par benoy

    Context : I am using ffmpeg for processing a raw video file in raw y4m format to mp4 at various brightness values for an experiment looking at OLED display performance. After looking at the ffmpeg documentation I was able to find the following filter (eq) for modifying the brightness of the video.
    https://ffmpeg.org/ffmpeg-filters.html#eq

    I used the information from the ffmpeg documentation and the following article (https://wjwoodrow.wordpress.com/2015/07/12/more-ffmpeg-hell/) to get videos with different qualities. But neither the ffmpeg documentation nor the article explains these values in detail.

    Question : Now my query is that, what does these eq values range correspond to ? Is it a percentage ? For example,

    ffmpeg -i input_1080p24.y4m -vf eq=1:-0.5:1:1:1:1:1:1 -vcodec libx264 -b:v 8000k -s 1920x1080 -g 15 -n -r 30 output_1080p.mp4

    gives me a output video with reduced brightness. But how do I quantify this brightness reduction ? Does this eq = -0.5 correspond to 50% reduction in original brightness ? In other words, is this a linear scale ?

    This is my first post on stackoverflow. Thanks !

  • I need to install FFMPEG to Ubuntu 14.04 from Github using Composer. But it says Nothing to install or update

    23 août 2016, par ildar

    Recently i have installed composer and Ratchet. Everything worked fine but now i need to install FFMPEG through here. Json and Lock files were already been created and i just upgraded it. I have FFMPEG in .lock file and in JSON file (as it was told). So now, when i’m running

    ./composer.phar install

    it is not installing and telling me

    Loading composer repositories with package information
    
Installing dependencies (including require-dev) from lock file
    
Nothing to install or update
    
Generating autoload files

    What is wrong with this installer ?

  • ffmpeg, how to specifying 'xfade' format as 'yuva444p10le' ? [closed]

    11 mars 2024, par userxxxxxxxxx

    The xfade options works with yuv420p with no problem.
but, if want to xfade between two yuva444p10le format file,
how to put the format option ? just leave it blank(no specifying format)
or put 'format=yuva444p10le' which not working.

    


    How to apply xfade for yuva444p10le files without losing alpha yuva444p10le files ?

    


    When specifying yuva444p10le, xfade not processing the xfade. ignore data stream. not concated. and no format option with yuva444p10le files also not concated. xfade still not working.
Any idea ? What am I missing ?

    


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