How can the web player recognize correct app to connect the stream?

(http://stream-recorder.com/forum/showthread.php?t=5100)

How can the web player recognize correct app to connect the stream?

take this xml file as example

Code:

http://fms.api.tvb.com/getSmil.php?source_id=30992&video_id=102797

from the above link, it contains rtmpe url and the playpath

so i tried to rip it with this

rtmpe://e1a.vdo.vip.hk1.tvb.com/vi//mp4:/4/254/000000025391.mp4

it doesnt work,then i tried this

rtmpe://e1a.vdo.vip.hk1.tvb.com/tv//mp4:/4/254/000000025391.mp4

it works!
as you notice,the app makes a difference here
the question is, how can the swf player recognize the correct app to connect the stream?