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  • Emballe médias : à quoi cela sert ?

    4 février 2011, par

    Ce plugin vise à gérer des sites de mise en ligne de documents de tous types.
    Il crée des "médias", à savoir : un "média" est un article au sens SPIP créé automatiquement lors du téléversement d’un document qu’il soit audio, vidéo, image ou textuel ; un seul document ne peut être lié à un article dit "média" ;

  • 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.
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  • Contribute to a better visual interface

    13 avril 2011

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  • Making ffmpeg/javacv less verbose in java

    16 octobre 2022, par lejlot

    I have a Java application that uses ffmpeg library and javacv to load and process video files.

    



    I am currently using following code, for loading videofile to my data container.

    



    public boolean add(String videofile) {
        FrameGrabber g = new OpenCVFrameGrabber( videofile );
        try{ 
            g.start();
        }
        catch(Exception e){
            g = new FFmpegFrameGrabber( videofile );
            try {
                g.start();
            }catch(Exception x){
                return false;
            }
        }
        grabbers.add( new Pair(videofile, g) );
        frames.add( 0 );
        preprocessed=false;
        return true;        
    }


    



    Each time video is loaded, a library outputs a lot of meta information regarding video itself :

    



    


    Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '/home/lejlot/data/test.mp4' : 
 Metadata :
 major_brand : isom
 minor_version : 512
 compatible_brands : isomiso2mp41
 encoder : Lavf53.21.1 Duration : 00:04:36.27, start : 0.000000, bitrate : 305 kb/s
 Stream #0:0(und) : Video : mpeg4 (Simple Profile) (mp4v / 0x7634706D), yuv420p, 1280x720 [SAR 1:1 DAR 16:9], 303 kb/s, 20,85
 fps, 30 tbr, 1k tbn, 1k tbc
 Metadata :
 handler_name : VideoHandler

    


    



    which obviously I do not want to see. I cannot (do not want) to modify the libraries source codes, but rather modify my own so it can intercept this log and discard it.

    



    As far I tried to temporarly block the stdout/stderr streams through

    



    private static final devnull = new PrintStream(new OutputStream() {
        @Override
        public void write(int b) {
            //DO NOTHING
        }
        @Override
        public void write(byte[] b,int x,int y){
        }
   });

   /**
   * Blocks messages to stdout
   */
   public static void silentStdOut(){
     System.setOut(devnull);
   }

   /**
   * Blocks messages to stderr
   */
   public static void silentStdErr(){
     System.setErr(devnull);
   }


    



    but it does not seem to help, log message is still displayed

    



    public boolean add(String videofile) {
    Utils.silentStdErr();
    Utils.silentStdOut();
    FrameGrabber g = new OpenCVFrameGrabber( videofile );
    try{ 
        g.start();
    }
    ,,,


    



    "Raw" ffmpeg can be set to be less verbose using

    



    ffmpeg -loglevel panic


    



    but neither OpenCVFrameGrabber not FFmpegFrameGrabber give access to the tool's parameters.

    



    To sum up - how can I discard these log messages without modifing the libraries' source codes ?

    


  • rtpdec_qt : Use a local variable instead of RTP_FLAG_KEY

    4 mars 2015, par Martin Storsjö
    rtpdec_qt : Use a local variable instead of RTP_FLAG_KEY

    The only case where RTP_FLAG_KEY actually is needed is
    
in RDT, where such a flag needs to be passed via the
    
rtpdec parse function’s flags parameter.
    

    Signed-off-by : Martin Storsjö <martin@martin.st>
    • [DBH] libavformat/rtpdec_qt.c

  • How to play local video using ffplay and nginx ?

    17 février 2016, par Bhoomi Loriya
    • I want to play video using ffplay.I store data in local machine.
      directory path is like :
      C:\ffmpeg\bin
    • Using this command i cant play this video.

      ffplay frlive.m3u8
    • Above code can’t work.
    • If i am play live video than they work fine this code is like :
      ffplay -i  <a href="http://media.webtvlive.eu/rtc/_definst_/mp4:live_720p.stream/playlist.m3u" rel="nofollow">http://media.webtvlive.eu/rtc/<em>definst</em>/mp4:live_720p.stream/playlist.m3u</a>
      - This code work properly.

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