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  • L’utiliser, en parler, le critiquer

    10 avril 2011

    La première attitude à adopter est d’en parler, soit directement avec les personnes impliquées dans son développement, soit autour de vous pour convaincre de nouvelles personnes à l’utiliser.
    Plus la communauté sera nombreuse et plus les évolutions seront rapides ...
    Une liste de discussion est disponible pour tout échange entre utilisateurs.

  • Use, discuss, criticize

    13 avril 2011, par

    Talk to people directly involved in MediaSPIP’s development, or to people around you who could use MediaSPIP to share, enhance or develop their creative projects.
    The bigger the community, the more MediaSPIP’s potential will be explored and the faster the software will evolve.
    A discussion list is available for all exchanges between users.

  • Installation en mode ferme

    4 février 2011, par

    Le mode ferme permet d’héberger plusieurs sites de type MediaSPIP en n’installant qu’une seule fois son noyau fonctionnel.
    C’est la méthode que nous utilisons sur cette même plateforme.
    L’utilisation en mode ferme nécessite de connaïtre un peu le mécanisme de SPIP contrairement à la version standalone qui ne nécessite pas réellement de connaissances spécifique puisque l’espace privé habituel de SPIP n’est plus utilisé.
    Dans un premier temps, vous devez avoir installé les mêmes fichiers que l’installation (...)

Sur d’autres sites (6352)

  • FFmpeg amix + volume filters create saturated output ?

    1er septembre 2021, par Sonia Seddiki
    


    First of all, this is a question asked more out of curiosity than desperate need of fixing. I seem to have "fixed" it by upgrading from FFmpeg 3.4.6 to FFmpeg 4.3.1. Or so I think, at least the result is much better.

    


    


    I'm trying to mix 2 audio files (of the same length, so no scale variation here) using FFmpeg amix filter :

    


      

    • A music which starts pretty loud in the beginning and then is almost quiet until the end,

      • 


    • An audio that starts with silence (basically as long as the music is loud), then continues with a person speaking at an "average" volume

      • 


    


    Now, I learnt that the filter will divide each input volume by 1/nb_active_inputs (by 2 in my case then), so I added a volume filter on the output to multiply its volume by 2. My command basically looks like this :

    


    ffmpeg -i music.mp3 -i voice.mp3 -filter_complex amix=inputs=2:duration=first[mix];[mix]volume=2[out] -map [out] output.mp3


    


    After that complex filter, my final output is completely distorted. The voice sounds overall very loud and saturated.

    


    I'm not an expert with audio nor with FFmpeg so I assume I'm missing something. I'm trying to understand what is going on and why I am having this result since I use the same inputs, filters and filter options in both cases. Only the FFmpeg version differs.

    


    I've tried to read the code of af_amix.c for both versions but can't seem to find any explanation for that difference. I've seen that the 4.3.1 has a weights option for inputs but from what I understood, they default to 1.0 if not specified. Any clue would be much appreciated.

    


  • Added ipv4 and ipv6 to additional methods, thanks Natal Ngetal (hobbestigrou) (changelog update)

    15 juillet 2010, par jzaefferer

    m changelog.txt Added ipv4 and ipv6 to additional methods, thanks Natal Ngetal (hobbestigrou) (changelog update)

  • Added ipv4 and ipv6 to additional methods, thanks Natal Ngetal (hobbestigrou) (changelog update)

    15 juillet 2010, par jzaefferer

    m changelog.txt Added ipv4 and ipv6 to additional methods, thanks Natal Ngetal (hobbestigrou) (changelog update)

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