How to convert a 2 dvd movie onto 1 dvd?

So i have a series on dvd that comes with 6 discs.
I am wanting to convert it to 3 disc (not worried about the quality)
But i’m not sure how to convert it.
Thanks
Answer #1
You Might Want To Try DVD Shrink, Here’s A Link:
http://www.google.com?t=812243&highlight=
Answer #2
the quality will be reduced dont forgot that