Adding sidebars to PAL->NTSC conversion to keep aspect ratio

[markd]

Though I am a newbie, I've had no luck with this question on Google searches and searches on this site, so it might well be a question better suited for this thread. Please forgive me if I missed an existing answer with the search patterns I used.

My primary interest is in DVD archival concert trading and much of the best content is from old PAL broadcast captures that are not commercially available. Many DVD players will now play PAL DVDs to NTSC TVs, but many of those just chop off the top and bottom to make it fit. What I'm looking to do is take advantage of all the advice on this site to make the best possible conversion from 720x576 to 600x480 to preserve the aspect ratio, then add 60 pixel black sidebars to create 720x480 content that will play on ANY and ALL NTSC DVD players and TVs.

Does anyone know of any freeware/shareware/low-cost-commercial tools that would help me add those sidebars either before or during DVD authoring?

Many thanks,
Mark

[guns1inger]

Please post only once. I have responded to your other post here -> https://forum.videohelp.com/viewtopic.php?p=1616118#1616118