Sur d’autres sites (5055)

• Don’t use expressions with side effects in macro parameters

  28 juillet 2016, par Martin Storsjö

  Don’t use expressions with side effects in macro parameters
  AV_WB32 can be implemented as a macro that expands its parameters
  
  multiple times (in case AV_HAVE_FAST_UNALIGNED isn’t set and the
  
  compiler doesn’t support GCC attributes) ; make sure not to read
  
  multiple times from the source in this case.
  Signed-off-by : Martin Storsjö <martin@martin.st>
  

  • [DBH] libavcodec/dxv.c
  • [DBH] libavformat/xmv.c

• libavutil : document side effects of macros

  10 juillet 2014, par Christophe Gisquet

  libavutil : document side effects of macros
  Signed-off-by : Michael Niedermayer <michaelni@gmx.at>
  

  • [DH] libavutil/intreadwrite.h

• How to manage hls in Nginx RTMP module

  27 mars, par syrkandonut

  I would like to manage the hls broadcast on request, like stop/start or some other way in Nginx RMTP module.
My rtmp server needs to support many cameras, however, when it does ffmpeg exec for 200-300 rtmp streams, this is very difficult for the processor, so I would like to execute the ffmpeg command in parallel only on request, how could this be done ?

  


  Rtmp Server

  


  rtmp {
    server {
        listen 1935;
        chunk_size 8192;

        application live {
            live on;
            record off;
            drop_idle_publisher 10s;
            allow publish all;

            on_publish rtmp-router:8082/on_publish;

              exec ffmpeg -i rtmp://localhost:1935/live/$name
              -f lavfi -i anullsrc -c:v copy -c:a aac -shortest -f flv rtmp://localhost:1935/hls/$name_main;
        }


        application hls {
            live on;
            hls on;
            hls_fragment_naming system;
            hls_fragment 2;
            hls_playlist_length 4;
            hls_path /opt/data/hls;
            hls_nested on;

            hls_variant _main BANDWIDTH=878000,RESOLUTION=640x360;
        }
    }
}


  


  I would like to solve this through nginx or python itself, since the server running with threads is written in FastAPI.