[Bearcat]

As far as I know the .trk and .ntrks are mere logfiles, containing the waypoints and actions all objects in a track have taken (their course, height, firing, crashing, etc.)
The game engine compiles the tracks from this data into a viewable film.

In my guessing it would be quite an effort to make a converter, because you would first have to understand the way the engine works and then try to extract or rebuild the part of the coding, that compiles the .trk/.ntrk "logs" into viewable movies.

I could be dead wrong here, but I guess, it won't be all that easy, if not impossible.

You are correct... Tracks are not video files... they are playback of the actions that happened in a given recorded track. Te sim plays the actions back as if the mission was beoing flown again IN EXACTLY THE SAME WAY. You would still need something to convert what you are seeing to some kind of video format. I would like to see something thnat would allow control over the sequnece of the inputs... thereby in effect letting them run in reverse... or go from one section to another.