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  • Récupération d’informations sur le site maître à l’installation d’une instance

    26 novembre 2010, par

    Utilité
    Sur le site principal, une instance de mutualisation est définie par plusieurs choses : Les données dans la table spip_mutus ; Son logo ; Son auteur principal (id_admin dans la table spip_mutus correspondant à un id_auteur de la table spip_auteurs)qui sera le seul à pouvoir créer définitivement l’instance de mutualisation ;
    Il peut donc être tout à fait judicieux de vouloir récupérer certaines de ces informations afin de compléter l’installation d’une instance pour, par exemple : récupérer le (...)

  • 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

  • Encoding and processing into web-friendly formats

    13 avril 2011, par

    MediaSPIP automatically converts uploaded files to internet-compatible formats.
    Video files are encoded in MP4, Ogv and WebM (supported by HTML5) and MP4 (supported by Flash).
    Audio files are encoded in MP3 and Ogg (supported by HTML5) and MP3 (supported by Flash).
    Where possible, text is analyzed in order to retrieve the data needed for search engine detection, and then exported as a series of image files.
    All uploaded files are stored online in their original format, so you can (...)

Sur d’autres sites (9147)

  • Color matching by color mapping using feature detection

    22 mai 2018, par Fabien Biller

    My goal is to match colors of two videos filming the same scene at slightly different positions. For this purpose, I created an algorithm that searches for corresponding features in one matching still frame of both videos. I then normalized the color relationships of the matching pixels

    (r-value + 1) / 256
    
(g-value + 1) / 256
    
(b-value + 1) / 256

    and converted them into curves as in

    curves=r='0.1/0.2 ...':g=....'

    Yet the result is rubbish.

    I need to actually tell ffmpeg with a number of rgb-values : "This rgb-value is to be this rgb-value" and not separately map each red value of for instance 66 to 22, but map each 66-22-18 to 44-77-123. The missing mappings should be interpolated.

    Or can a list of

    Color1 maps to Color2

    be converted into curves or similar ?

  • Create an image in PHP and turn it into a 10-second video [on hold]

    17 septembre 2019, par Emil A.

    I remember being able to create an image in PHP with custom text and background etc, then output it (or save) as a JPG/PNG etc. I want to do this but output this 1 frame as a 10-second MP4-video. How can I achieve this ?

    (Note : The end-result will show an unique and dynamical URL for cases where someone tries to watch the video without permission ; think hotlink-prevention for video.)

  • download youtube video as audio file, with URL in filename, to a specific output directory

    9 octobre 2018, par thanks_in_advance

    I do this to download a video as an audio file (mp3), with the video’s youtube URL (URI actually) in the audio file’s filename (I like having the URI in the filename because it helps me identify which video I grabbed the audio from) :

    youtube-dl --extract-audio --audio-format mp3 --prefer-ffmpeg --ffmpeg-location "C:\FFMPEG" "https://www.youtube.com/watch?v=k1-TrAvp_xs" --audio-quality 0

    The con with this approach : with this command, the file downloads to the same directory that contains youtube-dl.exe

    I do this to download a youtube video as an audio file (mp3) to a specific output directory :

    youtube-dl -o "C:\Documents\Downloads\%(title)s.%(ext)s" --extract-audio --audio-format mp3 --prefer-ffmpeg --ffmpeg-location "C:\FFMPEG" "https://www.youtube.com/watch?v=k1-TrAvp_xs" --audio-quality 0

    The con with this approach : with this command, the downloaded audio file’s filename doesn’t contain the youtube video’s URI.

    My Question : How can I combine the above 2 commands such that the downloaded audio file doesn’t have either of the cons mentioned above ?

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