Can someone please find me this stream

[Dshah]

Hi, I just found out about rtmpdump and trying to find the rtmp url, i am using centos OS and here is command i used

 rtmpdump -v -r "rtmp://50.117.24.90/live/mp4:livestream_1.f4v" | vlc -

error i get:

WARNING: HandShake: client signature does not match!
INFO: Connected...
ERROR: rtmp server sent error
ERROR: rtmp server requested close
[0x7f5cbc001588] main stream error: cannot pre fill buffer

url of stream:

http://dunyanews.tv/livehd/

can please someone tell me why its not working? Thanks