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Médias (21)

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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 (...)

  • Librairies et logiciels spécifiques aux médias

    10 décembre 2010, par

    Pour un fonctionnement correct et optimal, plusieurs choses sont à prendre en considération.
    Il est important, après avoir installé apache2, mysql et php5, d’installer d’autres logiciels nécessaires dont les installations sont décrites dans les liens afférants. Un ensemble de librairies multimedias (x264, libtheora, libvpx) utilisées pour l’encodage et le décodage des vidéos et sons afin de supporter le plus grand nombre de fichiers possibles. Cf. : ce tutoriel ; FFMpeg avec le maximum de décodeurs et (...)

  • MediaSPIP 0.1 Beta version

    25 avril 2011, par

    MediaSPIP 0.1 beta is the first version of MediaSPIP proclaimed as "usable".
    The zip file provided here only contains the sources of MediaSPIP in its standalone version.
    To get a working installation, you must manually install all-software dependencies on the server.
    If you want to use this archive for an installation in "farm mode", you will also need to proceed to other manual (...)

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  • CANNOT LINK EXECUTABLE error with required libs loaded. How to link them properly ? [duplicate]

    11 septembre 2019, par dentex

    This question already has an answer here :

    edit : I’m aware of the possible duplicate, but the answer it’s not directly applicable. I’m using ProcessBuilder and not Runtime.getRuntime().exec :

    public int execProcess(List<string> cmds, ShellUtils.ShellCallback sc) {    
    
    StringBuilder cmdlog = new StringBuilder();
    
    for (String cmd : cmds) {
    
         cmdlog.append(' ');
    
    }
    
    Utils.logger("v", cmdlog.toString(), DEBUG_TAG);
    

    
    ProcessBuilder pb = new ProcessBuilder();
    
    pb.directory(mBinFileDir);
    
    pb.command(cmds);
    

    
    Process process = null;
    
    int exitVal = 1; // Default error
    
    try {
    
        process = pb.start();
    

    
        StreamGobbler errorGobbler = new
    
        StreamGobbler(process.getErrorStream(), "ERROR", sc);
    

    
        StreamGobbler outputGobbler = new
    
        StreamGobbler(process.getInputStream(), "OUTPUT", sc);
    

    
        errorGobbler.start();
    
        outputGobbler.start();
    

    
        exitVal = process.waitFor();
    

    
        sc.processComplete(exitVal);
    

    
     } catch (Exception e) {
    
         Log.e(DEBUG_TAG, "Error executing ffmpeg command!", e);
    
     } finally {
    
         if (process != null) {
    
             Utils.logger("w", "destroyng process", DEBUG_TAG);
    
             process.destroy();
    
         }
    
    }
    
    return exitVal;
    
}
    
</string>

    I have two versions on FFmpeg compiled for android : with and without liblame enabled.

    When I load in /data/data/&lt;>/app_bin/ the FFmpeg binary compiled with NO lame support, it extracts audio from video without an issue. But when I use the one with lame support enabled, I get the error below into the log.

    Required libs, also compiled for android, are correctly loaded when shipped into the libs project folder with System.loadLibrary("lame").

    I was wondering if there is something else to do in order to properly make the FFmpeg binary find the libs.
    Those are the same libs given to the NDK to build the FFmpeg binary.

    D/dalvikvm(13741): Trying to load lib /data/app-lib/&lt;>/liblame.so 0x40ffed08
    
D/dalvikvm(13741): Added shared lib /data/app-lib/&lt;>/liblame.so 0x40ffed08
    
D/dalvikvm(13741): No JNI_OnLoad found in /data/app-lib/&lt;>/liblame.so 0x40ffed08, skipping init
    
D/FfmpegController(13741): Trying to chmod '/data/data/&lt;>/app_bin/ffmpeg' to: 755
    
V/FfmpegController(13741): /data/data/&lt;>/app_bin/ffmpeg -y -i /storage/sdcard0/Download/video.webm -vn -acodec copy /storage/sdcard0/Download/audio.ogg 
    
>>>>>> ---------- &lt;&lt;&lt;&lt;&lt;&lt;
    
D/DownloadsService(13741): soinfo_link_image(linker.cpp:1673): could not load library "liblame.so" needed by "/data/data/&lt;>/app_bin/ffmpeg"; caused by load_library(linker.cpp:771): library "liblame.so" not foundCANNOT LINK EXECUTABLE
    
>>>>>> ---------- &lt;&lt;&lt;&lt;&lt;&lt;
    
I/DownloadsService(13741): FFmpeg process exit value: 255

    I’m not attaching code because it’s fairly straightforward :

    • download the FFmpeg binary (it’s not shipped with the app) ;
    • copy the binary from the download folder to /data/data/&lt;>/app_bin/ ;
    • chmod 755 ;
    • execute from there and read the output.

    Please comment if something else is required.

  • build : Use -Werror=format-security

    21 décembre 2014, par Agostino Sarubbo
    build : Use -Werror=format-security

    Reduce the chance of introducing a class of bugs quite hard to track.
    • [DBH] configure

  • avformat/mov : calculate rfps from the first 100 frames of the index

    5 décembre 2013, par Michael Niedermayer
    avformat/mov : calculate rfps from the first 100 frames of the index

    This reduces the amount of frames that need to be demuxed in av_find_stream_info()
    

    Signed-off-by : Michael Niedermayer <michaelni@gmx.at>
    • [DH] libavformat/mov.c

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