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  • La sauvegarde automatique de canaux SPIP

    1er avril 2010, par

    Dans le cadre de la mise en place d’une plateforme ouverte, il est important pour les hébergeurs de pouvoir disposer de sauvegardes assez régulières pour parer à tout problème éventuel.
    Pour réaliser cette tâche on se base sur deux plugins SPIP : Saveauto qui permet une sauvegarde régulière de la base de donnée sous la forme d’un dump mysql (utilisable dans phpmyadmin) mes_fichiers_2 qui permet de réaliser une archive au format zip des données importantes du site (les documents, les éléments (...)

  • D’autres logiciels intéressants

    12 avril 2011, par

    On ne revendique pas d’être les seuls à faire ce que l’on fait ... et on ne revendique surtout pas d’être les meilleurs non plus ... Ce que l’on fait, on essaie juste de le faire bien, et de mieux en mieux...
    La liste suivante correspond à des logiciels qui tendent peu ou prou à faire comme MediaSPIP ou que MediaSPIP tente peu ou prou à faire pareil, peu importe ...
    On ne les connais pas, on ne les a pas essayé, mais vous pouvez peut être y jeter un coup d’oeil.
    Videopress
    Site Internet : (...)

  • 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 (4541)

  • h263 : make default color black, like flv

    20 novembre 2011, par Michael Niedermayer

    h263 : make default color black, like flv

  • Overlay of multiple sources with layer order like CSS z-index

    6 mars 2021, par Basj

    Note : I've already read a few questions/answers about [ffmpeg] overlay, but it did not fully answer this.

    


    Let's say we have five inputs [0] ... [4] that can be images, videos, etc.

    


    I'd like to overlay them in a precise order, a bit like "Photoshop layers" or CSS z-index.

    


    Currently I use ffmpeg with a "recursive" use of overlay like this :

    


       -filter_complex "
        [0]setpts=PTS-STARTPTS[s0];
        [1]setpts=PTS-STARTPTS+3/TB[s1];
        [2]setpts=PTS-STARTPTS+7/TB[s2];
        [3]setpts=PTS-STARTPTS+8/TB[s3];
        [4]setpts=PTS-STARTPTS+9/TB[s4];
        [s0][s1]overlay=enable='between(t,3,13)'[o1];
        [o1][s2]overlay=enable='between(t,7,12)'[o2];
        [o2][s3]overlay=enable='between(t,8,15)'[o3];
        [o3][s4]overlay=enable='between(t,9,12)'[o4];
   "


    


    Question : with ffmpeg, is there a way to do a mixing of different inputs / "layers" :

    


      

    • in a shorter way that this recursive use of overlay

      • 


    • and such that we can specify the "stack order" of each layer, like with CSS z-index

      • 


    


     ?

    


    To give a concrete example, how would you modify this command such that :

    


      

    • from 0'00" to 0'10", the layer order (from background to foreground) is 0, 1, 2, 3, 4

      • 


    • from 0'10" to 0'15", the layer order (from background to foreground) is 2, 3, 1, 4, 0 (i.e. [0] goes to foreground)

      • 


    


     ?

    


  • Color shift when encoding DNxHD QuickTime Video [closed]

    13 mai 2013, par Yani

    I have been tasked with developing the Editorial submission pipeline for an animated feature film project. Our studio is based on Windows 7 and the Editing team is using Avid Media Composer. We have decided to go with the "fast import" approach for bringing media into Avid. My tools take some frames and encode DNxHD QuickTime videos from them, then we write out an ALE document to assist with the batch importing of the delivery content. We call it the "fast import" approach because Avid only has to change the video container from MOV to MXF and it doesn't have to do any real encoding which is usually the time consuming part.

    I have tried comparing DNxHD QuickTime videos encoded using FFmpeg, RVIO and Nuke. The color in each video is different but the only one that matches the video created by importing frames directly into the Avid is the video generated by Nuke. I have heard the color shift may be caused by the way the Apple QuickTime libraries manage color on the Windows platform, is this true ? If so, how is Nuke able to produce the correct output ? Also, is there any way I can produce the correct output using FFmpeg or RVIO ?

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