Well thanks for your nice reply pff.
I indeed don’t mind the pillarboxing, but I DO mind letterboxing. I want to cut those off, not the bars on the sides. The clips I have already have black bars on them. So it looks like I already made a choice. No letterboxing. Pillarboxing is ok.
I just wondered if I did something wrong, because on an old TV it cuts some of and not on a flatscreen.