Part of a bigger online project, where users can upload their own content onto a collective server, I started to program a toolkit that would ease that workflow. After a while I found myself writing something like an ingame scene designer, combined with a multitracking system which synchronizes not only video and audio, but all the objects a game engine can handle.
Here’s the manual (sorry, only in German), the program itself will be uploaded the next two days.
Manual I'll be grateful for bug reports. It's a complex tool and there might be ways to treat this I could never ever imagine