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Autres articles (27)

  • 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 (...)

  • 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 (...)

  • Installation en mode ferme

    4 février 2011, par

    Le mode ferme permet d’héberger plusieurs sites de type MediaSPIP en n’installant qu’une seule fois son noyau fonctionnel.
    C’est la méthode que nous utilisons sur cette même plateforme.
    L’utilisation en mode ferme nécessite de connaïtre un peu le mécanisme de SPIP contrairement à la version standalone qui ne nécessite pas réellement de connaissances spécifique puisque l’espace privé habituel de SPIP n’est plus utilisé.
    Dans un premier temps, vous devez avoir installé les mêmes fichiers que l’installation (...)

Sur d’autres sites (4281)

  • mkv extract full DTS HD Master and Dolby True HD in flac or wav

    11 novembre 2016, par esposito

    I have some mkv files with audio in DTS Master 5.1 / 7.1 and Dolby True HD.

    I like to extract the full lossless audio 24/96 (core + residual part) in one flac or wav.

    If I do this :

    ffmpeg.exe -i input.mkv -map 0:2 output.dts

    or this :

     ffmpeg.exe -i input.mkv -map 0:2 output.flac

    it will extact only a lossy part. For dolby true HD there is the some problem I suppose.

    There is a way to extact full "lossless" audio in flac or wav directly ?

    I don’t like extact 2 files (core + residual) but "merge" All in one flac/wav file.

    thank you !

  • how to add reference movie into ffmpeg psnr filter in codes (computing psnr)

    15 octobre 2016, par user1317278

    I just want to find out how to use the psnr filter in ffmpeg in codes.

    I have followed the codes stated in https://ffmpeg.org/ffmpeg-filters.html#psnr :

    sprintf(args, "movie=ref_movie.avi [main];[main][ref] psnr=\"stats_file=stats.log\" [out]");
    
err = avfilter_graph_create_filter(&psnrCtx,  psnrFilter, "psnr", args, NULL, m_filterGraph);
    
if ( err < 0 ) {
    
    avfilter_graph_free(&m_filterGraph);
    
    m_filterGraph = NULL;
    
    return false; }

    But the error message return to me :

    Option 'movie' not found

    I also try this :

    sprintf(args, "stats_file=stats.log");
    
err = avfilter_graph_create_filter(&psnrCtx,  psnrFilter, "psnr", args, NULL, m_filterGraph);
    
if ( err < 0 ) {
    
   avfilter_graph_free(&m_filterGraph);
    
   m_filterGraph = NULL;
    
   return false; }
    
err = avfilter_link(last_ctx, 0, psnrCtx, 0);
    
if ( err < 0 ) {
    
   avfilter_graph_free(&m_filterGraph);
    
   m_filterGraph = NULL;
    
   return false;}
    

    
...  
    
err = avfilter_graph_config(m_filterGraph, NULL);
    
if ( err < 0 ) {
    
   avfilter_graph_free(&m_filterGraph);
    
   m_filterGraph = NULL;
    
   return false;
    
}

    but the error message return to me :

    Input pad "reference" with type video of the filter instance "psnr" of psnr not connected to any source

    I search psnr filter in codes but there is not much information about it. Can anyone help on this ?

  • recompiling audio from a movie source

    4 novembre 2016, par jkushner

    Is it possible to recompile movie files to re-stream the audio so they all have the same volume level ? We’ve got users submitting videos and to me it seems some are higher in volume whereas others are not, and they all have the same volume level on the controls, and i’d like to standardize this so all movie files have the same volume levels.

    I was thinking of ffmpeg although I only have novice knowledge of this technology and haven’t done my research in it yet.

    Anyway if there’s anything available I’d love to know.

    Thanks !

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