Does something like this exist?
For those unaware, Avid does not ship with the capability to read certain camera codecs. RED RAW is one of them, and it requires an external "AMA plugin" that you download from Avid's site here https://avid.secure.force.com/pkb/articles/en_US/Download/en394823 (https://avid.secure.force.com/pkb/articles/en_US/Download/en394823).
Does anything like this exist for MLV files? I highly doubt it, since MLV is such a niche format used by people who had only a DSLR lying around (like myself). I've been using MLV app to transcode to ProRes to edit in.
This is not an easy SDK unfortunately !
Did you try Drastic MediaReactor plugin ? https://www.drastic.tv/productsmenu-56/mediareactorlist/mediareactor-lite-avid (https://www.drastic.tv/productsmenu-56/mediareactorlist/mediareactor-lite-avid)