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Autres articles (34)

  • Supporting all media types

    13 avril 2011, par

    Unlike most software and media-sharing platforms, MediaSPIP aims to manage as many different media types as possible. The following are just a few examples from an ever-expanding list of supported formats : images : png, gif, jpg, bmp and more audio : MP3, Ogg, Wav and more video : AVI, MP4, OGV, mpg, mov, wmv and more text, code and other data : OpenOffice, Microsoft Office (Word, PowerPoint, Excel), web (html, CSS), LaTeX, Google Earth and (...)

  • Le plugin : Podcasts.

    14 juillet 2010, par

    Le problème du podcasting est à nouveau un problème révélateur de la normalisation des transports de données sur Internet.
    Deux formats intéressants existent : Celui développé par Apple, très axé sur l’utilisation d’iTunes dont la SPEC est ici ; Le format "Media RSS Module" qui est plus "libre" notamment soutenu par Yahoo et le logiciel Miro ;
    Types de fichiers supportés dans les flux
    Le format d’Apple n’autorise que les formats suivants dans ses flux : .mp3 audio/mpeg .m4a audio/x-m4a .mp4 (...)

  • MediaSPIP v0.2

    21 juin 2013, par

    MediaSPIP 0.2 is the first MediaSPIP stable release.
    Its official release date is June 21, 2013 and is announced here.
    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 (...)

Sur d’autres sites (5720)

  • how do I set speed rate (ex:double speed) in FFmpeg library ?

    19 avril 2018, par geeeek

    I’m working on rtsp live video from ffmpeg and rendering it on the screen.

    However, the image is displayed after 1 to 2 seconds.

    to reduce video delay, So I want to increase the playback speed in my program.

    int64_t duration = m_formatCtx-> duration;
    
duration = duration * 1000;
    
av_seek_frame (m_formatCtx, m_videoStream, duration, AVSEEK_FLAG_ANY);
    
av_seek_frame (m_formatCtx, m_audioStream, duration, AVSEEK_FLAG_ANY);
    
while (av_read_frame (m_formatCtx, & m_packet)> = 0)

    I can not get the result I want in this way.

  • How to reduce latency when streaming x264

    10 janvier 2014, par tobsen

    I would like to produce a zerolatency live video stream and play it in VLC player with as little latency as possible.

    This are the settings I currently use :

    x264_param_default_preset( &m_Params, "veryfast", "zerolatency" );
    

    
m_Params.i_threads              =   2;
    
m_Params.b_sliced_threads       =   true;
    
m_Params.i_width                =   m_SourceWidth;
    
m_Params.i_height               =   m_SourceHeight;
    

    
m_Params.b_intra_refresh        =   1;
    

    
m_Params.b_vfr_input            =   true;
    
m_Params.i_timebase_num         =   1;
    
m_Params.i_timebase_den         =   1000;
    

    
m_Params.i_fps_num              =   1;
    
m_Params.i_fps_den              =   60;
    

    
m_Params.rc.i_vbv_max_bitrate   =   512;
    
m_Params.rc.i_vbv_buffer_size   =   256;
    
m_Params.rc.f_vbv_buffer_init   =   1.1f;
    

    
m_Params.rc.i_rc_method         =   X264_RC_CRF;
    
m_Params.rc.f_rf_constant       =   24;
    
m_Params.rc.f_rf_constant_max   =   35;
    

    
m_Params.b_annexb               =   0;
    
m_Params.b_repeat_headers       =   0;
    
m_Params.b_aud                  =   0;
    

    
x264_param_apply_profile( &m_Params, "high" );

    Using those settings, I have the following issues :

    • VLC shows lots of missing frames (see screenshot, "verloren"). I am not sure if this is an issue.
    • If I set a value <200ms for the network stream delay in VLC, VLC renders a few frames and than stops to decode/render frames.
    • If I set a value >= 200ms for the network stream delay in VLC, everything looks good so far but the latency is, obviously, 200ms, which is too high.

    Question :
    Which settings (x264lib and VLC) should I use in order to encode and stream with as little latency as possible ?

    enter image description here

  • How to reduce latency when streaming x264

    10 janvier 2014, par tobsen

    I would like to produce a zerolatency live video stream and play it in VLC player with as little latency as possible.

    This are the settings I currently use :

    x264_param_default_preset( &amp;m_Params, "veryfast", "zerolatency" );
    

    
m_Params.i_threads              =   2;
    
m_Params.b_sliced_threads       =   true;
    
m_Params.i_width                =   m_SourceWidth;
    
m_Params.i_height               =   m_SourceHeight;
    

    
m_Params.b_intra_refresh        =   1;
    

    
m_Params.b_vfr_input            =   true;
    
m_Params.i_timebase_num         =   1;
    
m_Params.i_timebase_den         =   1000;
    

    
m_Params.i_fps_num              =   1;
    
m_Params.i_fps_den              =   60;
    

    
m_Params.rc.i_vbv_max_bitrate   =   512;
    
m_Params.rc.i_vbv_buffer_size   =   256;
    
m_Params.rc.f_vbv_buffer_init   =   1.1f;
    

    
m_Params.rc.i_rc_method         =   X264_RC_CRF;
    
m_Params.rc.f_rf_constant       =   24;
    
m_Params.rc.f_rf_constant_max   =   35;
    

    
m_Params.b_annexb               =   0;
    
m_Params.b_repeat_headers       =   0;
    
m_Params.b_aud                  =   0;
    

    
x264_param_apply_profile( &amp;m_Params, "high" );

    Using those settings, I have the following issues :

    • VLC shows lots of missing frames (see screenshot, "verloren"). I am not sure if this is an issue.
    • If I set a value <200ms for the network stream delay in VLC, VLC renders a few frames and than stops to decode/render frames.
    • If I set a value >= 200ms for the network stream delay in VLC, everything looks good so far but the latency is, obviously, 200ms, which is too high.

    Question :
    Which settings (x264lib and VLC) should I use in order to encode and stream with as little latency as possible ?

    enter image description here

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