I've done thousands of conversions in my past
and i can say,
from my own experiences,
that DVDFlick is an OK freeware
but you get what you pay for
and dont get very good quality out of it...
So,
for converting video files to DVD-Video,
i strongly stronly suggest these,
as it hasn't failed me yet!
#1- Purchase ConvertXtoDVD
#2- Buy good quality media
#3- Burn at Max -> 12X
#4- Don't use your PC while your burning
try that and you'll see, your conversions will be just fine!