Recherche avancée

Médias (2)

Mot : - Tags -/plugins

Autres articles (111)

  • 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 (...)

  • HTML5 audio and video support

    13 avril 2011, par

    MediaSPIP uses HTML5 video and audio tags to play multimedia files, taking advantage of the latest W3C innovations supported by modern browsers.
    The MediaSPIP player used has been created specifically for MediaSPIP and can be easily adapted to fit in with a specific theme.
    For older browsers the Flowplayer flash fallback is used.
    MediaSPIP allows for media playback on major mobile platforms with the above (...)

  • ANNEXE : Les plugins utilisés spécifiquement pour la ferme

    5 mars 2010, par

    Le site central/maître de la ferme a besoin d’utiliser plusieurs plugins supplémentaires vis à vis des canaux pour son bon fonctionnement. le plugin Gestion de la mutualisation ; le plugin inscription3 pour gérer les inscriptions et les demandes de création d’instance de mutualisation dès l’inscription des utilisateurs ; le plugin verifier qui fournit une API de vérification des champs (utilisé par inscription3) ; le plugin champs extras v2 nécessité par inscription3 (...)

Sur d’autres sites (14771)

  • avformat/jacosubdec : Use 64bit for abs

    25 mars 2024, par Michael Niedermayer
    avformat/jacosubdec : Use 64bit for abs

    Fixes : negation of -2147483648 cannot be represented in type 'int' ; cast to an unsigned type to negate this value to itself
    
Fixes : 62276/clusterfuzz-testcase-minimized-ffmpeg_dem_JACOSUB_fuzzer-5401294942371840
    

    Found-by : continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
    
Signed-off-by : Michael Niedermayer <michael@niedermayer.cc>
    • [DH] libavformat/jacosubdec.c

  • How to avoid audio sample 16bit clipping after equalization ?

    28 mai 2013, par testCoder

    I have samples which come from ffmpeg, very often it is 16 bit samples (short type), i have used iir band pass filter with dbGain as described here, after filtering i sometimes got a short type overflow and result of it is some noise when calculated sample value go out from 32767/-32767, Is any way to escape audio pcm sample clipping. May be exists any approaches ?

    I have googled but not found any worked example ?

    UPDATE

    When i cast transfer function calculation result to integer and check overflow then noise still occurs: :

    int result = A1 * ((int) Rx) + A2 * ((int) Rxx) + A3 * ((int) Rxxx)
    
                    - B1 * ((int) Ryy) - B2 * ((int) Ryyy);
    
if (result > 32767)
    
    result = 32767;
    
if (result &lt; -32700)
    
    result = -32700;
    
y = (short) result;

  • From multiple video files to single output

    25 juillet 2019, par Cordo van Saviour

    Let’s say that I have a list of hundreds of possible video files. Using ffmpeg it’s pretty easy to take multiple files and stitch them together to single video output, but that’s where the things become tricky.

    I’m looking for a way to have them stream live and dynamically add videos to queue as stream goes on. Think of something like SSAI but for the whole video.

    Stream live is there so we don’t have a delay while waiting for ffmpeg to finish the whole video but rather start as soon as possible, and also so we could choose next files in queue during the live stream.

    Simplified, it would look something like this :

    [v] [v] [v] [v] - stored video files, eg. on S3 
    

    
      [v] - chosen file
    

    
      | | 
    
      | | - during the live stream
    
      | |
    
      \ /
    
       V    
    
   _________             ___________              ___________
    
   \       /             |         |              ||       ||
    
    \     /    =====>    |         |    =====>    ||  |:>  ||
    
     \___/               |_________|              ||_______||
    
  Video queue              FFMPEG?                Live stream
    
                      Transcoding module?
    
                            Magic?

    I’m writing this in Node.js if that makes any difference.

    Is this even possible ? If you need any more information please ask away, and every suggestion is greatly appreciated !

Navigation