What I am using is another popular Video Converter program: Pavtube Video Converter
It is used to convert among common videos and audios such as AVI, MPEG, WMV, MOV, MP4, FLV, etc.
I prefer the program as its after-sale service is wonderful. After I purchasing the program, their support center delivered an email for greeting and helping. How warm and kind!
So I think when choosing an appropriate program for ourselves, we should consider not only its quality, functions, but also its after-sale service.
By the way, its quality is good and there is no spyware.