Best software to convert Fraps Video

I am using Ripbot264 to convert videos recorded using Fraps but problem is that I have to add files one by one for the conversion.

Using Fraps:

File of size 3.90GB converted into .mkv (640*360) --- 32 MB


Is it possible to "Add folder" in Ripbot264 for conversion.
Else,Suggest me software similar to ripbot264.