Database design for embedded system

I am trying to design a database to keep track of a collection of video files. It is actually video recordings from a camera.

Since i am going to implement it on an embedded system i want to look at other alternatives to SQLITE. Can someone suggest databases that would work on embedded system like an ip camera?

Was thinking of graph databases since it would allow me to store lot of extra information about video files that would require lot of join in SQLite. These extra info are numerous that can be associated with the file.

Is it possible to use a key value store to model different kind of databases such as a graph or document database (use key value store as base).