Use rtmpdump!!
Code:
rtmpdump -r "rtmpe://main.eu.cdn.streamprovider.net:80/securestreaming" -a "securestreaming" -W "http://s.cdn.acunn.com/static/player/cdnauth2.swf" -p "http://www.acunn.com/video/yetenek-sizsiniz/nurullah-selimin-2-tur-performansi/1608" -T "tolga" -y "acunn/b/yetenek-sizsiniz/1330887317.mp4" -o "1330887317.flv"