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  • La file d’attente de SPIPmotion

    28 novembre 2010, par

    Une file d’attente stockée dans la base de donnée
    Lors de son installation, SPIPmotion crée une nouvelle table dans la base de donnée intitulée spip_spipmotion_attentes.
    Cette nouvelle table est constituée des champs suivants : id_spipmotion_attente, l’identifiant numérique unique de la tâche à traiter ; id_document, l’identifiant numérique du document original à encoder ; id_objet l’identifiant unique de l’objet auquel le document encodé devra être attaché automatiquement ; objet, le type d’objet auquel (...)

  • Websites made ​​with MediaSPIP

    2 mai 2011, par

    This page lists some websites based on MediaSPIP.

  • Creating farms of unique websites

    13 avril 2011, par

    MediaSPIP platforms can be installed as a farm, with a single "core" hosted on a dedicated server and used by multiple websites.
    This allows (among other things) : implementation costs to be shared between several different projects / individuals rapid deployment of multiple unique sites creation of groups of like-minded sites, making it possible to browse media in a more controlled and selective environment than the major "open" (...)

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  • Trying to crop an image in ffmpeg using alphamerge but produces wrong alpha

    12 septembre 2021, par Alex Styl

    I am using alphamerge in order to crop an image within a circle.

    


    What I have so far is :

    


    ffmpeg -f lavfi -i "color=c=white:size=240x240" -i avatar.png -i mask.png -filter_complex \
 "[1][2]alphamerge[img]; \
 [0][img]overlay[out]" -c:v png -map "[out]" -pix_fmt rgba -t 5 -y out.mp4 2>&1


    


    with avatar.png and mask.png respectively being :

    


    avatar mask

    


    This produces the following output (1 frame of the output video) :

    


    enter image description here

    


    which is unexpected, given the original input is much darker than this.

    


    How can I crop the 'avatar.png' using the 'mask.png' so that the output is the avatar.png cropped in a circle and keeping the same alpha ?

    


    PS : The important bit here is for me to be able to crop the original image and maintaining the correct colors/apha of the original image. If there is an other way of doing this (other than alphamerge) I am happy to hear it.

    


  • FFMPEG Compilation and Video Thumbnail Issues [on hold]

    2 janvier 2016, par P. Paul

    I have compiled FFMPEg on a Linux, Centos machine according to the guide in here https://trac.ffmpeg.org/wiki/CompilationGuide/Ubuntu , and the auto video thumbnail creation command in here https://trac.ffmpeg.org/wiki/Create%20a%20thumbnail%20image%20every%20X%20seconds%20of%20the%20video

    The problems are...

    1- When I use ffmpeg or ffmpeg -version command to check if ffmpeg has been installed I get the error message, "Command not found". But when I check for ffmpeg directory "~/ffmpeg_sources" is found and the machine says, "is a directory".

    2- Also, I did a test and upload video to the site to see if the video’s thumbnail will be automatically generated, but it didn’t show any thumbnail.

    Any help would be greatly appreciated.

    Thanks in advance !

  • Diagonal Split using ffmpeg

    8 juillet 2017, par Jeffin

    I am trying to acheive the following effect using ffmpeg

    enter image description here

    I have tried multiple options , but failed so far,

    I have referred the following questions , not happening for me

    I have three videos but i have somewhat acheived the diagonal split for two videos using the following code , but still couldnt get the output for three videos or four

    ffmpeg -i input0 -i input1 -filter_complex \
    
"[1:v][0:v]blend=all_expr=if(gt(X\,Y*(W/H))\,A\,B)" output

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