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  • Les formats acceptés

    28 January 2010, by

    Les commandes suivantes permettent d’avoir des informations sur les formats et codecs gérés par l’installation local de ffmpeg :
    ffmpeg -codecs ffmpeg -formats
    Les format videos acceptés en entrée
    Cette liste est non exhaustive, elle met en exergue les principaux formats utilisés : h264 : H.264 / AVC / MPEG-4 AVC / MPEG-4 part 10 m4v : raw MPEG-4 video format flv : Flash Video (FLV) / Sorenson Spark / Sorenson H.263 Theora wmv :
    Les formats vidéos de sortie possibles
    Dans un premier temps on (...)

  • Les vidéos

    21 April 2011, by

    Comme les documents de type "audio", Mediaspip affiche dans la mesure du possible les vidéos grâce à la balise html5 .
    Un des inconvénients de cette balise est qu’elle n’est pas reconnue correctement par certains navigateurs (Internet Explorer pour ne pas le nommer) et que chaque navigateur ne gère en natif que certains formats de vidéos.
    Son avantage principal quant à lui est de bénéficier de la prise en charge native de vidéos dans les navigateur et donc de se passer de l’utilisation de Flash et (...)

  • Gestion générale des documents

    13 May 2011, by

    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 sur (...)

On other websites (2471)

  • Compiling custom FFMPEG for mp3/wav to flac conversion

    3 December 2019, by Arttu

    I need to compile ffmpeg from source for CentOS. The goal it to convert MP3 and WAV to FLAC. I tried to compile ffmpeg with this guide: https://trac.ffmpeg.org/wiki/CompilationGuide/Centos
    and it worked fine, but took approximately 20min and compiled a bunch unnecessary things, even thought I did not used next options as recommended in guide, but used:

    PATH="$HOME/bin:$PATH" PKG_CONFIG_PATH="$HOME/ffmpeg_build/lib/pkgconfig" ./configure \
    
--prefix="/opt/tmg/ffmpeg_build" \
    
--pkg-config-flags="--static" \
    
--extra-cflags="-I/opt/tmg/ffmpeg_build/include" \
    
--extra-ldflags="-L/opt/tmg/ffmpeg_build/lib" \
    
--extra-libs=-lpthread \
    
--extra-libs=-lm \
    
--bindir="/opt/tmg/ffmpeg_build/bin" \
    
--enable-gpl \
    
--enable-libfreetype

    My question is what do I need for MP3 and WAV to FLAC and how do I compile just that part?

    I found in configuration --disable-all option, but what do I have to enable?

    Thanks in advance.

  • FFmpeg MSVC Compilation stuck

    10 May 2017, by Earinor

    For several days now I try to build the FFmpeg Libraries. I’m using Windows7 64 Bit and MSVC2010. I followed this guide: https://trac.ffmpeg.org/wiki/CompilationGuide/MSVC

    I got rid of a view errors and configure is working finally. But when I try make, it runs for like half an hour and then gets stuck. It won’t proceed, I kept it running over night and nothing happend. I also tried different compiler options but it gets stuck every time at the same point.

    ffv1dec.o_converted.c
    
d:\cpplibraries\ffmpeg-master\libavcodec\get_bits.h(308) : warning C4101: 're_cache' : unreferenced local variable
    
d:\cpplibraries\ffmpeg-master\libavcodec\golomb.h(360) : warning C4245: '=' : conversion from 'int' to 'unsigned int', signed/unsigned mismatch

    I also tried setting up a minGW64 Msys2 Environment but have the same issue there.
    I also tried another setup but when I get rid of some errors I always get stuck at the exact same position.

    The cl.exe is running and is using memory but nothing happens.

    I also get a ton of warnings like conversions from int to unsigned int, Makro redefinitions, etc.

    I have no idea where to look to fix this, so I would appreciate some help.

  • FFMPEG Video Encode Single Input Multi Output

    1 August 2014, by ShyamKG

    I have a custom video encoder filter which can produce upto 5 different bitrates for the same resolution.

    Note that single instance of the encoder is optimized for producing these multiple outputs. Every encode call returns 5 output buffers.
    This means that I would not want to run more than one encoder instance.

    I need to integrate this encoder to FFMPEG which should give multiple outputs for a single input. I have referred the following link regarding creating multiple outputs.
    https://trac.ffmpeg.org/wiki/Creating%20multiple%20outputs

    In this link multiple outputs are created by running multiple encoder instances which is not my requirement.

    Is there any way by which we can configure ffmpeg to give multiple output for one encoder instance?

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