Hi,
The requirement is :
- the application is vod application,not live. I see there is a way to switch live stream.
2.when the player play the video, the play do nc.call(“switchname”,null,“newfilename.mp4”) to the wowza server, then the streaming file is changed to another file on the server side.
- The streaming content changing is for individual user, will not affect others.
thanks a lot 
-Marvion
There is nothing built in to do what you are trying to do. It is possible that you may be able to achieve this via custom module if you are comfortable with Java, but I don’t have any suggestions of where to start.
You may want to seek a consultant for this, if so please post a request to the find a consultant forum.
There is also the following option, but does not meet all your requirements:
How to switch streams using Stream class streams
Regards,
Salvadore