There are programs that are better than others at increasing the scale from SD to HD, but why in the world would anyone think that SD could look anywhere near as good as HD? Increasing 720X480 to 1280X720 or even 1920X1080, God forbid, means that the pixels have to be a lot bigger. So each one is now 4. Where are the new pixels to come from?
A similar issue comes about when making 4:3 look like 16:9. If you must combine the two, use 4:3 not 16:9. Or letterbox the 16:9 and mask the 4:3 to match. The only way to make 4:3 into the same size as your 16:9 is to zoom in. Once again, where do the new pixels come from?
I don’t mean to upset anyone, but reality bites. Shoot HDV or HD and edit HDV or HD. Shoot SD and edit SD. You might even shoot HDV and edit SD until your tools catch up with your desire.
What is it they say about teaching a pig to sing? It wastes your time and annoys the pig. Making SD into HD just isn’t a worthwhile effort unless it is the only possible way to mix a little SD into a lot of HD.
Just my $0.02
Steven
https://www.stevengotz.com