How to convert mkv to avi without losing quality?

Ive done this before with success.
You will need FFmpeg.
https://superuser.com/questions/227338/how-to-convert-an-mkv-to-avi-with-minimal-loss

You need choices to answer this question?

Metaprogramming  is a programming technique in which computer programs have the ability to treat programs as their data. it means that a program can be designed to read, generate, analyse or transform other programs, and even modify itself while running. ps: you don't have any options there.