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Autres articles (3)

  • Keeping control of your media in your hands

    13 avril 2011, par

    The vocabulary used on this site and around MediaSPIP in general, aims to avoid reference to Web 2.0 and the companies that profit from media-sharing.
    While using MediaSPIP, you are invited to avoid using words like "Brand", "Cloud" and "Market".
    MediaSPIP is designed to facilitate the sharing of creative media online, while allowing authors to retain complete control of their work.
    MediaSPIP aims to be accessible to as many people as possible and development is based on expanding the (...)

  • Mise à disposition des fichiers

    14 avril 2011, par

    Par défaut, lors de son initialisation, MediaSPIP ne permet pas aux visiteurs de télécharger les fichiers qu’ils soient originaux ou le résultat de leur transformation ou encodage. Il permet uniquement de les visualiser.
    Cependant, il est possible et facile d’autoriser les visiteurs à avoir accès à ces documents et ce sous différentes formes.
    Tout cela se passe dans la page de configuration du squelette. Il vous faut aller dans l’espace d’administration du canal, et choisir dans la navigation (...)

  • MediaSPIP Core : La Configuration

    9 novembre 2010, par

    MediaSPIP Core fournit par défaut trois pages différentes de configuration (ces pages utilisent le plugin de configuration CFG pour fonctionner) : une page spécifique à la configuration générale du squelettes ; une page spécifique à la configuration de la page d’accueil du site ; une page spécifique à la configuration des secteurs ;
    Il fournit également une page supplémentaire qui n’apparait que lorsque certains plugins sont activés permettant de contrôler l’affichage et les fonctionnalités spécifiques (...)

Sur d’autres sites (2032)

  • Virtual host compared to multiple servers

    9 septembre 2011, par josiecat

    This may be dumb but has me wondering why and I know how to setup the virtual host but need to know the why or what it is good for.

    Why do you setup virtual host for local development and why not just put sub directories ?

    What are the real world uses and how do you use virtual host ?

    (my normal set up as of now)
    I use Mamp and just put more folders (speaking dummy terms here) in the htdocs folder. Is that ok what am I missing ?

    The reason why I would like to use virtual hosting is because I would like to have a few servers to try different technologies (e.g. adding ffmpeg support for streaming video and many others ) but do I use virtual hosting to be able to have more than one server or do I need to use something like virtual machine to have multiple servers with different versions of PHP, Mysql etc...?

    I understand how to set this stuff up just don't understand the difference from virtual host to multiple servers ? could I actually set up one with php just the basic and another for php with ffmpeg-php and other stuff like zend or what ever just to have different server environments to basically mock the actual server that the project will land when done ?

  • Why are the colors transposed in my webm thumbnails ?

    9 décembre 2022, par Peter Chaplin

    I have been using ffmpeg to generate webm files from png frames, and the webm files run ok in my video player, but the thumbnail colours appear transposed - blue replacing red, purple replacing orange, brown replacing green. I've also encountered issue uploading the webm to an image hosting site (which normally does support webms), though this might be an issue on their end.
I'm on Ubuntu 22.04.1 LTS

    


    Does anyone know what might be causing this, and how to fix it ? Or how to check whether the webm files are ok or corrupted ?

    


    *Edit : ok, here's a side-by-side comparison of the thumbnails that appear in my file explorer - mp4 on the left and webm on the right.
Both were generated from the same set of pngs, using the same command except with the filename extension changed.

    


    screencap of thumbnails

    


    Specifically,

    


    ffmpeg -framerate 24 -i Panel2Humanized/frame%04d.png panel2humanskin.webm


    


    and

    


    ffmpeg -framerate 24 -i Panel2Humanized/frame%04d.png panel2humanskin.mp4


    


    Both look the same when opened with a video player. It looks like the mp4 thumbnail grabbed the 1st frame while the webm grabbed the last, but the colors should be the same in each. (The text-bubble in the top-left is yellow in the mp4).

    


    *Follow-up : Apparently my WebMs are being generated in GBRP (Green-Blue-Red Planar) pixel format, the site I was trying to upload to requires YUV420P (Luma/Chroma 4:2:0 Planar) format, maybe that's the issue ? I'm still not sure exactly what that means or how to fix it.

    


    *Final follow-up : Looks like I needed to change the argument to :

    


    ffmpeg -framerate 24 -i Panel2Humanized/frame%04d.png -pix_fmt yuv420p paned2humanskin.webm


    


  • ffmpeg blend multiple files

    7 octobre 2022, par Gregory

    I currently have the following command that allows me to overlay files and apply a blending mode. This works well when I overlay 2 files, however when I try to overlay a third image, then the generated output is incorrect.

    


      

    • Blue

      • 


    • GroundShadow (softlight)

      • 


    • FeetShadows (multiply)

      • 


    


    Command :

    


    ffmpeg \
    -i /Users/me/Downloads/blue.gif \
    -i /Users/me/Downloads/GroundShadow.gif \
    -i /Users/me/Downloads/FeetShadows.gif \
    -y \
    -filter_complex "[0:v][1:v]blend=all_mode='softlight'[v1],[v1][2:v]blend=all_mode='multiply'[v2],[v2]split[s0][s1];[s0]palettegen[p];[s1][p]paletteuse" \
    /Users/me/Downloads/preview.gif


    


    





    


    


    


    


    



    


    


    


    


    Expected (ignore that it's animated) Result
    enter image description here enter image description here

    


    


    The background color is washed for some reason.
I'm not sure if i'm applying the blending filters in the right order or if you should split between the images to then apply the blend ? Or something else ?

    


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