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Autres articles (66)

  • Gestion générale des documents

    13 mai 2011, par

    MédiaSPIP ne modifie jamais le document original mis en ligne.
    Pour chaque document mis en ligne il effectue deux opérations successives : la création d’une version supplémentaire qui peut être facilement consultée en ligne tout en laissant l’original téléchargeable dans le cas où le document original ne peut être lu dans un navigateur Internet ; la récupération des métadonnées du document original pour illustrer textuellement le fichier ;
    Les tableaux ci-dessous expliquent ce que peut faire MédiaSPIP (...)

  • Liste des distributions compatibles

    26 avril 2011, par

    Le tableau ci-dessous correspond à la liste des distributions Linux compatible avec le script d’installation automatique de MediaSPIP. Nom de la distributionNom de la versionNuméro de version Debian Squeeze 6.x.x Debian Weezy 7.x.x Debian Jessie 8.x.x Ubuntu The Precise Pangolin 12.04 LTS Ubuntu The Trusty Tahr 14.04
    Si vous souhaitez nous aider à améliorer cette liste, vous pouvez nous fournir un accès à une machine dont la distribution n’est pas citée ci-dessus ou nous envoyer le (...)

  • 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 (...)

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  • mlt melt slideshow with audio is not playing sound

    13 juillet 2024, par 730wavy

    I am trying to run a melt/mlt command and so far it seems to work EXCEPT there's no audio sound being played. I know the audio track is being added because the length of the video. Here's what I have —

    



    melt \
placeholder.png length=200 \
inside.png length=200 \
placeholder.png length=200 \
-track waltz.mp3 -transition mix \
-consumer avformat:"output.mp4"


    



    Not sure why but the video does not have any sound

    


  • How to find if the videos have sound in it ?

    15 avril 2021, par RAVI

    I've a some hundreds of video files in a folder structure. All of them have video and audio streams, but some of them don't have any sound, despite having an audio stream. Is there a way to find out those files without having to resort to opening each file individually.

    



    Most ways I know only check if there is an audio stream.

    



    Thanks.

    


  • speex decoding make wrong sound (FFmpeg on iOS)

    2 juillet 2014, par user3796700

    I’m trying to use FFmpeg on iOS to play live streams.
    One with NellyMoser, as below : (success)

    avformat_open_input(&formatContext, "rtmp://my/nellymoser/stream/url", NULL, &options);

    Now I tried to play the same stream but encoded in Speex format.
    So I followed some tutorials, compiled "ogg.a, speex.a, speexdsp.a" for iOS ;
    Then re-compiled FFmpeg, linking to those three .a files.

    However the output is wrong :

    avformat_open_input(&formatContext, "rtmp://my/speex/stream/url", NULL, &options);

    The output sound is 2x faster than normal. It seems like only half of the data is decoded.

    Does anyone have tried similar things before ?
    I’ve stocked several days, really need help here..
    Thanks !

    As for reference, here is how I compile FFmpeg :

    ./configure \
    
--enable-libspeex \
    
--disable-doc \
    
--disable-ffmpeg \
    
--disable-ffserver \
    
--enable-cross-compile \
    
--arch=armv7 \
    
--target-os=darwin \
    
--cc=clang \
    
--as='gas-preprocessor/gas-preprocessor.pl clang' \
    
--sysroot=/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS7.1.sdk \
    
--cpu=cortex-a8 \
    
--extra-cflags='-arch armv7 -I ../speex/armv7/include -I ../libogg/armv7/include' \
    
--extra-ldflags='-arch armv7 -isysroot /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS7.1.sdk' \
    
--extra-ldflags='-L ../speex/armv7/lib -lspeexdsp -lspeex -L ../libogg/armv7/lib -logg' \
    
--enable-pic \
    
--prefix=/Users/chienlo/Desktop/speexLibrary/ffmpeg-2.2.4/armv7

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