bug fix for rtsp server

houxiao

2017-08-11 c6968ba2fbd5e9f4e32fd5f62fd587f9a7d2ebc1

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