Code:
rtmpdump -r "rtmp://flash-cloud.filmon.com/demand/storage/25/410/116548" -a "demand/storage/25/410/116548" -f "WIN 11,9,900,170" -W "http://www.filmon.com/tv/modules/FilmOnTV/files/flashapp/filmon/FilmonPlayer.swf" -p "http://www.filmon.com/vod/view/5717-0-letters-from-a-killer" -C O:1 -C O:0 -y "mp4:116548.mp4" -o "2014-02-09_11-55-38_mp4_116548.flv"