How to change call queue recording format

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

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

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