Is this even possible? At the onset, there is a license issue involved. Is FME Plug-in SDK an option?
My use case is a drone pilot needs to create a geopackage or an fgdb from pictures/videos collected during the mission and would need to do this from his laptop onsite so that he can pass on the data to a courier or deliver the data to the utility owner. I already have a workspace created with FME Desktop but it's not cost-effective to provide a license for each pilot.
The next best option is to provide ESRI's Drone2Map to each pilot which will do it - costs $1200 subscription per named user.
If I can develop something smaller and cheaper in FME that would be better.