Recherche avancée

Médias (91)

Autres articles (94)

  • Contribute to documentation

    13 avril 2011

    Documentation is vital to the development of improved technical capabilities.
    MediaSPIP welcomes documentation by users as well as developers - including : critique of existing features and functions articles contributed by developers, administrators, content producers and editors screenshots to illustrate the above translations of existing documentation into other languages
    To contribute, register to the project users’ mailing (...)

  • Use, discuss, criticize

    13 avril 2011, par

    Talk to people directly involved in MediaSPIP’s development, or to people around you who could use MediaSPIP to share, enhance or develop their creative projects.
    The bigger the community, the more MediaSPIP’s potential will be explored and the faster the software will evolve.
    A discussion list is available for all exchanges between users.

  • 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 (...)

Sur d’autres sites (8540)

  • How to capture camera devices on Windows using Libav ?

    22 septembre 2011, par Occulta

    Is there any way to capture frames from as many camera types as DirectShow do on Windows platform using Libav ? I need to capture a camera output without using DirectShow filters and I want my application to work with many camera devices types.

    I have searched the Internet about this capability of libav and found that it can be done via libav using special input format "vfwcap". Something like that (don't sure about code correctness - I wrote it by myself) :

    AVFormatParameters formatParams = NULL;
    
AVInputFormat* pInfmt = NULL;
    
pInFormatCtx*  pInFormatCtx = NULL;
    

    
av_register_all();
    

    
//formatParams.device = NULL; //this was probably deprecated and then removed
    
formatParams.channel = 0;
    
formatParams.standard = "ntsc"; //deprecated too but still available
    
formatParams.width = 640;
    
formatParams.height = 480;
    
formatParams.time_base.num = 1000;
    
formatParams.time_base.den = 30000; //so we want 30000/1000 = 30 frames per second
    
formatParams.prealloced_context = 0;
    

    

    
pInfmt = av_find_input_format("vfwcap");
    
if( !pInfmt )
    
{
    
  fprintf(stderr,"Unknown input format\n");
    
  return -1;
    
}
    

    
// Open video file (formatParams can be NULL for autodetecting probably)
    
if (av_open_input_file(&pInFormatCtx, 0, pInfmt, 0, formatParams) < 0)
    
   return -1; // Couldn't open device
    

    
/* Same as video4linux code*/

    So another question is : how many devices are supported by Libav ? All I have found about capture cameras output with libav on windows is advice to use DirectShow for this purpose because libav supports too few devices. Maybe situation has already changed now and it does support enough devices to use it in production applications ?

    If this isn't possible.. Well I hope my question won't be useless and this composed from different sources piece of code will help someone interested in this theme 'coz there are really too few information about it in the whole internet.

  • vorbisdec : read the previous window flag for long windows

    25 février 2012, par Justin Ruggles

    vorbisdec : read the previous window flag for long windows

  • Windows Media Audio Lossless decoder

    1er mars 2012, par Mashiat Sarker Shakkhar

    Windows Media Audio Lossless decoder

Navigation