I hope I was not leading you on, Triela. I had no intention of using this for myself! I admire clever coding that accomplishes useful tasks, and was drawn in by your enthusiasm. I really wanted to see you get this to work, because YOU wanted it. I can read code just well enough to take a nerdy interest in your solution. I totally believe that you got it working, so I do not need to confirm it for myself. I want to keep typing out Command Line commands in PART as a test of my memory. As in, "If I remember how to do this then I guess my brain is still working somewhat." Also I like seeing demonstrations of skill. I can watch gymnastics but never could do and never will attempt any of the movements.
(I still want to know in what documentation where you discovered the -cit option and how it works for captions.)
If anyone else wants to try out the .bat file, please report back the results.