I'm not too sure what you are asking, but it seems to me like you want to make one file into another, to burn in a diff format later on. To do this you must first encode the file to that desired file format. TMPGEnc does a good job at many file format types to encode from one type into another. And its a free program.
Get it here:
***Converting takes time, anywhere from 6-9 hours depending on system specs and devices used.