Code:
rtmpdump -r "rtmp://89.248.162.150/cast4u" -a "cast4u" -f "WIN 24,0,0,221" -W "http://www.cast4u.tv/static/scripts/fplayer.swf" -p "http://www.cast4u.tv/embedplayer/btsp1/1/630/450" -C S:OK --live -y "btsp1?id=29&pk=5f49e701a5db1a011796e9fc9950f97bcfbc1d893d20fb6c93bd7737231bb94a" -o "2017-02-20_05-00-07_btsp1.flv"