If I'm not mistaken you can change the settings so that the interval is shorter.
Also try to use a format that can be used in a normal text editor, makes things easier.
IMHO best tool for tracking is still OziExplorer or a dedicated tracking device.
For example my crash cam records the entire data for the full lenghts of the video, this includes not just the coordinates but also acceleration, heigth, breaking force, time and I think some other things.
But converting those records into a usable tracklog format would require the use of Exel or similar so the unwanted stuff is out and the rest converted into the correct form.