.FCPEVENT File Extension
What is an FCPEVENT file?
Event created and used by Final Cut Pro X (FCPX), an OS X professional video editor; contains information describing an event in FCPX, which includes related media and any metadata associated with that media.
FCPX uses events to store and organize media. When you import media files into the application, they are inserted into a new or existing event. When you create a FCPX project, you bring clips from an event into the project and build a sequence of story elements, which eventually is your movie.
NOTE: FCPEVENT files store data in an SQLite format, which means that they can be edited by SQLite editors.