I used to have a script that converts a VIDEO_TS folder into an ISO that plays ok in VLC but it's gone.
Anyway, this command gets me most of the way there:
hdiutil makehybrid -udf -udf-volume-name $folder -o $fullpath.iso $fullpath
Except that when I tried it on one DVD, it skips the menu selection. Is this likely a problem with the one DVD I tried or do I need a different tool / different options to get the menu to render properly?