Whats a program i can use to make blu ray files to dvd files?

the blue ray files are too big and i need to make them into DVD files. i use the 4.7 dvd discs, but it only has like 16 clips and i'd like to get more. maybe it is because the blu ray files are so big that it takes up all the space. i want to at least get 100+ minutes on the 120 minute dvd disc to burn.

thanks