I convert anime avi to vcd using tmpenc.

I know there is a problem with overscan and to put a border around it, but i the problem i am having is that if i use the same settings e.g 312x258 (pal) and borders are sometimes smaller and bigger,

I was thining is it due to the resolution of the orginial avi file?

i am also changing it to 4.3 pal aspect ratio, does that make a diffference or should i just have it 1.1

Thanks