Code:
rtmpdump -r "rtmp://cdnfms551.ilcdn.net/cdncust" -a "cdncust" -f "WIN 11,8,800,94" -W "http://cdn558.ilcdn.net/files/20120307183539/player_enter1/Dimusica_Livebeats_Player_Enter1.swf" -p "http://cdn558.ilcdn.net/files/20120307183539/player_enter1/player_enter1_on_livebeats.html?transactionEnvironment=livebeats" -y "mp4:20130524165314/live/enter/enter2013_1.mp4" -o "output.flv"