mep to avi conversion is usually searched by users that found old video projects from Movavi Video Editor (.mep) and are looking for a way to export these to standard video format, in this case AVI format.
Unfortunately, latest version of Movavi Video Editor no longer supports these ancient files (version 10 or older), so the only remaining option here is to obtain copy of Movavi software somewhere in the depths of the Internet.
You can try to reach out to Movavi support as well, but it is not very likely they will have a working solution either.
Updated: January 3, 2024