My god, you are awesome!!
Forget completely that way!!
Another way, in the same rtmpdump folder, create a new "Text Document", Open it, paste this below link in it, save it. Then rename "New Text Document.txt" file to "command.bat"!! click on it to run "rtmpdump"!!
Code:
rtmpdump.exe -r "rtmp://flash90.ustream.tv/ustreamVideo/10046365" -a "ustreamVideo/10046365" -W "http://static-cdn1.ustream.tv/swf/live/viewer.rsl:85.swf" -p "http://www.ustream.tv/earthcam" -y "streams/live_1" --live -o earthcam.flv