Now you uderstand why I’m confused too. If you want I can post a llink of some examples. The 480×384 ratio did not come froma dream or the bingo but from the the 5:4 export dialogue of FCP. I got good results by chance and I kept them.
At this point, beeing so many variables (i did some googloling with your keywords) I believe the best thing to do is to write down a table og “good sizes” and work with it…
Thanks for your help.