I have started recording from the s-video output of my HDTV cable box. The signal is analog at 16:9 ratio. My recording software marks the file as being 4:3. Is there a way to change the info in the file without converting the entire file (from mpg to mpg), as I am currently doing? It's not only a waste of time, about 20 min. to covert an hour, but there is a slight loss of quality. Hopefully there is program somewhere which can modify the file header.