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  • 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 (...)

  • Qu’est ce qu’un éditorial

    21 juin 2013, par

    Ecrivez votre de point de vue dans un article. Celui-ci sera rangé dans une rubrique prévue à cet effet.
    Un éditorial est un article de type texte uniquement. Il a pour objectif de ranger les points de vue dans une rubrique dédiée. Un seul éditorial est placé à la une en page d’accueil. Pour consulter les précédents, consultez la rubrique dédiée.
    Vous pouvez personnaliser le formulaire de création d’un éditorial.
    Formulaire de création d’un éditorial Dans le cas d’un document de type éditorial, les (...)

  • Taille des images et des logos définissables

    9 février 2011, par

    Dans beaucoup d’endroits du site, logos et images sont redimensionnées pour correspondre aux emplacements définis par les thèmes. L’ensemble des ces tailles pouvant changer d’un thème à un autre peuvent être définies directement dans le thème et éviter ainsi à l’utilisateur de devoir les configurer manuellement après avoir changé l’apparence de son site.
    Ces tailles d’images sont également disponibles dans la configuration spécifique de MediaSPIP Core. La taille maximale du logo du site en pixels, on permet (...)

Sur d’autres sites (6962)

  • ffprobe - getting video info from file chunk

    13 septembre 2015, par andrzej1_1

    On my site users can upload videos, which are encrypted on the fly and stored on another server. I want to store video bitrate, frame rate etc., but I have not direct access to them and I can not just use the following command :

    ffprobe -show_streams -i file.mp4

    I tried saving last chunk on my server, which contain moov atom, but ffprobe is outputting :

    Format mov,mp4,m4a,3gp,3g2,mj2 detected only with low score of 1, misdetection possible!
    
moov atom not found
    
C:\file.mp4: Invalid data found when processing input

    I checked and truncating at least one byte cause this, although moov atom is intact.

    What is the proper way to get video metadata from file fragment containg moov atom ? What about getting informations from piece of mdata atom ?

  • Issues in python based ffmpeg operation

    28 septembre 2021, par Adideva98

    I am trying to write a script that would automatically take duration values and chop an audio file into smaller splits. To do this I have saved all my start times and durations in a list. And this is the code I am trying to run.

    


    for k in range(0,len(start_time)):
  s=start_time[k]
  e=Duration[k]
  filename = "output%d.mp3" % (k)
  !ffmpeg -i Audio.mp3 -ss s -t e -acodec copy filename
  k=k+1


    


    On running this I get the following error
Invalid duration specification for ss: s
I suspect that this error arises because of the fact that since I am using lists to call elements, the time stamp comes with quotes on both sides. Secondly, I am not sure how to specify the filename, such that each created split has the name of this format Output_1.mp3 and so on. The integer will be an identifier of the split. What could be possible fixes for this piece of code ? Please note that I am running this on Google Colab.

    


  • How to stream only a part of a video without downloading the whole thing ?

    11 mai 2024, par Abbas

    I am building a YouTube video trimmer, and currently, it takes the YouTube video ID, downloads the whole video from the server (Even it is like 10 hours long), and then it trims it according to user's inputted timeframe using ffmpeg.

    


    Now the problem with this is that it takes so much time to download the whole video even if we want a small piece of it hence it is highly impractical.

    


    I was thinking to implement something like an HTML5 video player does when you seek the video forward. It just jumps to the part where you seek-ed to without downloading the part you skipped over. How can I only download a part of a video file from a server in form of a buffer and then generate an already trimmed video file from that ? I don't know if that is even possible on the server-side, but video players do it on the client-side.

    


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