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  • Publier sur MédiaSpip

    13 juin 2013

    Puis-je poster des contenus à partir d’une tablette Ipad ?
    Oui, si votre Médiaspip installé est à la version 0.2 ou supérieure. Contacter au besoin l’administrateur de votre MédiaSpip pour le savoir

  • Supporting all media types

    13 avril 2011, par

    Unlike most software and media-sharing platforms, MediaSPIP aims to manage as many different media types as possible. The following are just a few examples from an ever-expanding list of supported formats : images : png, gif, jpg, bmp and more audio : MP3, Ogg, Wav and more video : AVI, MP4, OGV, mpg, mov, wmv and more text, code and other data : OpenOffice, Microsoft Office (Word, PowerPoint, Excel), web (html, CSS), LaTeX, Google Earth and (...)

  • Script d’installation automatique de MediaSPIP

    25 avril 2011, par

    Afin de palier aux difficultés d’installation dues principalement aux dépendances logicielles coté serveur, un script d’installation "tout en un" en bash a été créé afin de faciliter cette étape sur un serveur doté d’une distribution Linux compatible.
    Vous devez bénéficier d’un accès SSH à votre serveur et d’un compte "root" afin de l’utiliser, ce qui permettra d’installer les dépendances. Contactez votre hébergeur si vous ne disposez pas de cela.
    La documentation de l’utilisation du script d’installation (...)

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  • Changing volume halfway through video using FFmpeg ?

    10 avril 2019, par Essem

    I’m trying to use the fluent-ffmpeg NPM module in an application to decrease the volume of the audio in the first half of a video, then increase the volume when it reaches the midway point. I’ve wrote this code to try to do that :

    const ffmpeg = require("fluent-ffmpeg");
    

    
ffmpeg("test.mp4")
    
 .audioFilters("volume=enable='between(t,0,t/2)':volume='0.25'", "volume=enable='between(t,t/2,t)':volume='1'")
    
 .save("output.mp4");

    However, whenever I run this code, the volume levels of output.mp4 are exactly the same as test.mp4. What do I do ?

  • Is it possible to change volume with no reencode with ffmpeg ?

    30 juin 2023, par John Smith

    I just had this question because I used the following command with ffmpeg :

    



    ffmpeg -i input.wav -filter:a "volume=0.2" output.wav


    



    Following the documentation here : https://trac.ffmpeg.org/wiki/AudioVolume

    



    However, when I created the new file, the output was half the size of the input and the bitrate of the audio track was reduced as well.

    



    So my questions are :

    



      

    1. Is the bitrate supposed to decrease with decreasing and increasing volume like so ?

      2. 


    2. Is it possible to change volume without reencoding with ffmpeg ?

      3. 


    


  • Why do the results of my "ffmpeg -ss -to" split have audio but no video ?

    10 avril 2018, par BenKnght

    I am trying to split clips into short intervals (that I am reading in from a csv) using ffmpeg. The commands that I’m using look like this :

    ffmpeg -i filename.mp4 -ss 00:00:00.030000 -to 00:00:02.030000   
    
-pix_fmt yuv420p -c copy new_filename.mp4

    This successfully splits the parent mp4 into many smaller mp4s, but the smaller files lose some or all of their video. Most of them end up being just audio. Some have video - but only for about half of the clip (the rest is black). The audio is always there. Any ideas why this might be happening ?

    A couple notes : I’m using ffmpeg 3.0.2. Also, I am creating this command as a Python list and running it with the following call

    subprocess.run(cmd, stderr=subprocess.STDOUT)

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