Code:
rtmpdump -v -r "rtmp://198.23.103.72/vod/_definst_" -a "vod/_definst_" -f "WIN 12,0,0,77" -W "http://p.jwpcdn.com/6/8/jwplayer.flash.swf" -p "http://player.screenwavemedia.com/play/player.php?id=Cinemassacre-53100fa8e149f" -y "mp4:Cinemassacre-53100fa8e149f_hd1.mp4" -o "output.flv"