Bobson Dugnutt, I appreciate what you are doing.
But the perspective adjustment, even if technically correct, it is not the only possible way to fix it…
Yes, there is another unorthodox method to get the perspective right, preserving more details on both sides, at the cost of diagonal lateral sides…
top Bobson Dugnutt, middle mine (using PAL SVCD), bottom HDTV:
as you can see, the perspective is (more or less) in line, while there are more image on both “triangular slices” at the sides; also, image is a bit better due to increased resolution of PAL SVCD (480x576) in comparison to VCD (352x240/288). NOTE: final version will got both top quadrilateral vertices touching the screen sides, here they are moved to align with the HDTV.
Now, if someone could be interested in a such bizarre version (that, techically, is another UAR), please let me know.