.FLV / .AVI / .WMV straight to DVD using TMPG DVD Authorworks 5

OK,

First off, forgive me if this question is WAY off...

But if I am going to use TMPG DVD Authorworks 5 to create DVD"s using many of the .flv / .avi / .wmv files, are there any things to look at for each file format (size, etc..) that will let me know which would and wouldnt be good to be burnt to DVD and watched on a TV?

I have seen many .flv and .wmv files moved to DVD that ended up looking great using the software, but want to know if there is a secret or somethign to make sure of before randomly choosing .flv / .wmv / .avi files or other formats and using TMPG to create and burn to DVD..

Thanks!