I'm not sure I'm clear what the significance of assigning this property or that property to a Vegas project. Doesn't the rendering dictate the desired output?
If it is incorrect (<1% chance), AND there is field jitter in the DVD, one would change the field order in Media Properties, not Project Properties. If your DVD plays without jitter in a hardware player, leave it alone.
Former user
wrote on 7/12/2017, 2:31 PM
Isn't generated media created at the Project Properties settings?
To set Project properties, click the icon and select a media to "Match Media Properties." No other intervention is required, nor generally useful.
Not 100% true. The de-interlace property does affect the final output, at least in my experience, when rendering interlaced to progressive, like 1080i to 1080 60p.