args.push("-rtbufsize","2000M","-f","gdigrab","-show_region","1","-video_size",""+screenSize+"","-draw_mouse","1","-framerate","5","-i","desktop","-vf","scale="+screenInfos2.bounds.width+":-1","-b:v","512k","-r","5","-f","flv","rtmp://" + server + "/live/SD1");
It looks like a screen capture...