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Autres articles (53)

  • Websites made ​​with MediaSPIP

    2 mai 2011, par

    This page lists some websites based on MediaSPIP.

  • Creating farms of unique websites

    13 avril 2011, par

    MediaSPIP platforms can be installed as a farm, with a single "core" hosted on a dedicated server and used by multiple websites.
    This allows (among other things) : implementation costs to be shared between several different projects / individuals rapid deployment of multiple unique sites creation of groups of like-minded sites, making it possible to browse media in a more controlled and selective environment than the major "open" (...)

  • Contribute to a better visual interface

    13 avril 2011

    MediaSPIP is based on a system of themes and templates. Templates define the placement of information on the page, and can be adapted to a wide range of uses. Themes define the overall graphic appearance of the site.
    Anyone can submit a new graphic theme or template and make it available to the MediaSPIP community.

Sur d’autres sites (8682)

  • 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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