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Autres articles (17)

  • Keeping control of your media in your hands

    13 avril 2011, par

    The vocabulary used on this site and around MediaSPIP in general, aims to avoid reference to Web 2.0 and the companies that profit from media-sharing.
    While using MediaSPIP, you are invited to avoid using words like "Brand", "Cloud" and "Market".
    MediaSPIP is designed to facilitate the sharing of creative media online, while allowing authors to retain complete control of their work.
    MediaSPIP aims to be accessible to as many people as possible and development is based on expanding the (...)

  • Contribute to a better visual interface

    13 avril 2011

    MediaSPIP is based on a system of themes and templates. Templates define the placement of information on the page, and can be adapted to a wide range of uses. Themes define the overall graphic appearance of the site.
    Anyone can submit a new graphic theme or template and make it available to the MediaSPIP community.

  • Les statuts des instances de mutualisation

    13 mars 2010, par

    Pour des raisons de compatibilité générale du plugin de gestion de mutualisations avec les fonctions originales de SPIP, les statuts des instances sont les mêmes que pour tout autre objets (articles...), seuls leurs noms dans l’interface change quelque peu.
    Les différents statuts possibles sont : prepa (demandé) qui correspond à une instance demandée par un utilisateur. Si le site a déjà été créé par le passé, il est passé en mode désactivé. publie (validé) qui correspond à une instance validée par un (...)

Sur d’autres sites (3358)

  • How to generate stereo sine wave using FFMPEG ?

    1er janvier 2020, par John Doe

    I’m trying to generate a stereo sine wave using FFMPEG (batch file), but have a different frequency for left and right. So far I have this :

    ffmpeg -f lavfi -i "sine=frequency=1000:duration=60" -ac 2 "binaural.wav"

    But it creates the same frequency for both left and right.
    Is this possible ?

  • Android camera stream with rtmp has stable 5 second latency

    8 avril 2014, par native1989

    I use ffmpeg with h264 build and javacv on android to stream video from camera to rtmp server.
    I was trying to set all possible video framerates and bitrates, set preset ultrafast, but I still have stable 5 seconds delay.
    If i use android mediarecorder sending mpegts stream with rtmp to server,i have only 2 seconds delay, and if I use -fflags nobuffer options on the client(ffmpeg), the video is appearing immediately.

    I don`t know how in android ffmpeg reduces this latency.
    Here the code :

        recorder = new FFmpegFrameRecorder(ffmpeg_link, imageWidth, imageHeight, 1);
    
    recorder.setFormat("flv");
    
    recorder.setFrameRate(frameRate);
    
    recorder.setVideoBitrate(900*1000);
    
    recorder.setVideoCodec(avcodec.AV_CODEC_ID_H264);
    
    recorder.setVideoOption("preset", "ultrafast");
    
    recorder.setVideoOption("tune", "zerolatency");
    
    recorder.setVideoOption("fflags", "nobuffer");
    
    recorder.setVideoOption("analyzeduration", "0");

  • FFMPEG and Mencoder building screenshot returns 0 size images

    12 avril 2014, par Genus

    I have a script and it used to work fine but suddenly it stopped working and giving me zero size images as screenshot after video convert.

    here is the command for video screenshot.

    $cmd = $GLOBALS["paths"]["ffmpeg"]." -y -i ".$file." -f mjpeg -r 1 -ss ".$time." -vframes 1 -an ".$tmpdir."/00000001.jpg 2>&1";
    
    exec($cmd,$results);

    Debug :

    -----------------------------------------------------
    

    
------------mencoder_and_fmpeg.php SCREENSHOT -------
    

    
-----------------------------------------------------
    

    
  COMMAND: ffmpeg -y -i /home/TESTING/public_html/vid/6d/ad/29/6dad2946a2ba102.flv -f mjpeg -r 1 -ss 14.48 -vframes 1 -an /home/TESTING/public_html/scr/42/3a/92/00000001.jpg 2>&1
    

    
  FFmpeg version SVN-r16244, Copyright (c) 2000-2008 Fabrice Bellard, et al.
    

    
  configuration: --disable-mmx --enable-shared --enable-libvorbis --enable-gpl --enable-swscale --enable-pthreads --disable-static --disable-demuxer=v4l --disable-demuxer=v4l2 --enable-libtheora --enable-gpl --enable-libspeex --enable-libmp3lame --enable-libfaac --enable-libfaad --enable-libfaadbin --enable-libamr-nb --enable-libamr-wb --enable-nonfree --enable-libxvid
    
  libavutil     49.12. 0 / 49.12. 0
    
  libavcodec    52. 7. 0 / 52.108. 0
    
  libavformat   52.23. 1 / 52.92. 0
    
  libavdevice   52. 1. 0 / 52. 2. 3
    
  libswscale     0. 6. 1 /  0.12. 0
    

    
  built on Apr  9 2011 22:48:41, gcc: 4.1.2 20080704 (Red Hat 4.1.2-50)
    
  built by Admin-Ahead Server Technologies FFmpeg installer v5.0.6b
    
  Seems stream 0 codec frame rate differs from container frame rate: 1000.00 (1000/1) -> 10.92 (131/12)
    
  Stream mapping:
    
  Stream #0.0 -> #0.0
    

    
  Press [q] to stop encoding
    
  ffmpeg: symbol lookup error: ffmpeg: undefined symbol: frame_hook_process

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