According to my friend’s recommendation, I tried macx dvd ripper pro to convert DVDs to my ipad, it is useful as handbrake. Yesterday, I got the information from their support that they have updated this app with many new functions (283 output files in all), converting dvd movies to many fashionable devices. So I think I should tell this information to you, maybe you are just troubled about importing dvd to your ipad mini or anyone else. If you need such app, maybe it's worth a try. Or just read : D