it’s not an NTSC problem
I am using NTSC media and making an NTSC DVD like I have in this
work flow for over 10 years. The problem is that DVD Studio Pro is no
longer working properly on an old Mac. I need to reset to factory settings,
which is not working, or get a suggestion for DVD authoring software
like Roxio Toast 19 that works well
to author DVDs on a Mac.