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Autres articles (52)

  • Les autorisations surchargées par les plugins

    27 avril 2010, par

    Mediaspip core
    autoriser_auteur_modifier() afin que les visiteurs soient capables de modifier leurs informations sur la page d’auteurs

  • 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 (...)

  • Librairies et binaires spécifiques au traitement vidéo et sonore

    31 janvier 2010, par

    Les logiciels et librairies suivantes sont utilisées par SPIPmotion d’une manière ou d’une autre.
    Binaires obligatoires FFMpeg : encodeur principal, permet de transcoder presque tous les types de fichiers vidéo et sonores dans les formats lisibles sur Internet. CF ce tutoriel pour son installation ; Oggz-tools : outils d’inspection de fichiers ogg ; Mediainfo : récupération d’informations depuis la plupart des formats vidéos et sonores ;
    Binaires complémentaires et facultatifs flvtool2 : (...)

Sur d’autres sites (5929)

  • ftp: move create control connection to function

    30 mai 2013, par Lukasz Marek
    ftp: move create control connection to function

    Move common code that opens control connection to function.
    
This code can be reused when reconnecting to FTP server
    
after inactivity.
    • [DH] libavformat/ftp.c

  • Revision 9068bce4e7 : Put iterative motion search under speed control Enable iterative motion search

    3 juin 2013, par Jingning Han

    Changed Paths :
     Modify /vp9/encoder/vp9_rdopt.c



    Put iterative motion search under speed control

    Enable iterative motion search for compound inter-inter prediction
    of block sizes 4x4/4x8/8x4 only when best coding quality is selected.
    The iterative motion search provides about 0.1% gains for derf and
    stdhd at this point, at the expense of longer runtime.

    Change-Id : Idc03e7f827e51f1bb8d269bc3752ee297a6bbfe5

  • x264 rate control

    31 août 2012, par Craig

    We are using the x264 encoder in a video conferencing project, we have the basic streaming video working, however, we are having trouble understanding how the various rate control settings determine the final bitrate.
    We set the following params :

    x264_param_t params;
    
x264_param_default_preset(&params, "ultrafast", "zerolatency");
    
params.i_threads = 1;
    
params.i_width = width;
    
params.i_height = height;
    
params.i_fps_num = fps;
    
params.i_keyint_max = fps;
    
params.b_intra_refresh = 1;
    
params.b_repeat_headers = 1;
    
params.b_annexb = 1;
    

    
//Set rate control stuff here
    

    
x264_param_apply_profile(&params, "baseline");

    If we only set the params.rc.i_bitrate param, the encoder seems to massively overshoot the bitrate. If we set the i_vbv_max_bitrate & i_vbv_buffer_size params we see a bitrate which peaks (and sometimes overshoots) the i_vbv_max_bitrate setting. Obviously having tight control over the biterate is important for video conferencing, but the documentation is kind of opaque. Is anybody else using x264 for video conferencing ? How are you setting the encoder ? Any help appreciated, thanks in advance.

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