How to change call queue recording format

General Help
#1

How can I change call queue format, in order to add the extension?
Currently the default format is: q-795-6302790629-20150513-131518-1431537281.8986034.wav

I want to add the extension in front of q-795-6302790629-20150513-131518-1431537281.8986034.wav

#2

that is not possible the naming convention is determined when the call starts and the agent is unkown at that time.

#3

Is it possible to add the extension at the end of wav file?