Is it legal to torrent a movie that you bought on DVD/Blu-ray already?

Let's say I bought a DVD, I want to rip it to my computer (which is
legal), but I'm lazy. Can I get a torrent of the movie or is that
illegal, I don't want to wait 5+ hours for the movie to rip.
I would like to play the movie without the need to carry the DVD
around if I'm traveling.