Great results.

Converted GoPro HD (1080) to AVI. This software converted the file fast.
Had to change the input file extension from m4v to mp4,
otherwise it did not recognize the input file type. After this it worked great.
The avi output is by default set to 500kbs max rate which
produces small output files but not so great quality if there is a lot of motion.
Changed AVI rate to auto setting and the output appears
to be about the same quality as input.

Peter31415h about AVI Video Converter