bug fix for rtsp client

houxiao

2017-08-18 7f0053c8f0cd76ecff7f8aee060cd4fd5093b1a3

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¿¼ÇÚÄ£¿é=checking 
Óû§Ä£¿é=user 
·ÃÎÊÄ£¿é=visit 
µç»°ºô½Ð=calling 
ʵʱ¼à¿Ø=monitoring