Handbrake is primarily used for DVD ripping but recently added support for conversion. There are also a bunch of other apps out there that just focus on conversion. Check the Mac app store.
If you don't want to deal with conversion then check out FlexPlayer in the iOS app store. Once loaded on your device you can copy all media files to your device using iTunes and play then using this app. Works great, saves time. You will need to turn off iCloud syncing for FlexPlayer or it will use up all of your cloud space trying to back up the media files.
Posted via RS Mobile