I need to rip Blu ray to iPad Mini...

You could resort to Leawo Blu-ray Ripper for Mac to reach this aim. And after converting Blu-ray for iPad, you can utilize iTunes or Leawo iTransfer to transfer converted video to iPad for watching. Just Follow below steps.

Step 1: Load Blu-ray Movies
Leawo Blu-ray Ripper for Mac is a part of Leawo Prof. Media for Mac. Launch Leawo Prof. Media for Mac and then open the "Convert" module. This Blu-ray to iPad Mac converter supports to convert both Blu-ray discs and Blu-ray folders. Click the "Add Blu-ray/DVD" button to load source Blu-ray disc or folders. If you want to convert Blu-ray discs, insert your Blu-ray disc into the Blu-ray drive before you click "Add Blu-ray/DVD" button.

Step 2: Output settings
Click the clickable drop-down box before the big green "Convert" button and then select "Change" option to enter "Profile" frame and choose MP4, MOV or H.264 from "Format" group for iPad tablet. For your convenience, you could also directly choose iPad from "Device" group.

Tip: After setting output profile, open the drop-down box again and then select "Edit" option. You're guided to a "Profile Settings" panel, where you are able to adjust output profile parameters, including: video codec, audio codec, bit rate, aspect ratio, frame rate, channel, and other video/audio parameters for output files.

Step 3: Set output directory
After setting output profile, go back to the main interface and click the big green "Convert" button on the sub menu bar. On the popup sidebar, set output directory in "Save to" box.

Step 4: Start to convert Blu-ray to iPad on Mac
On the popup sidebar, click the "Convert" button to let this Blu-ray to iPad Mac converter start to rip Blu-ray to iPad on Mac immediately.

After conversion, you then only need to transfer converted Blu-ray movies to iPad tablets. You could transfer converted Blu-ray movies to iPad via iTunes in the below way:
1.Open the output directory folder you set in Step 2.
2.Then import the converted Blu-ray movies (now in iPad compatible video format) to iTunes.
3.Connect your iPad tablet to computer and then sync the converted Blu-ray movies to start to transfer Blu-ray to iPad on Mac as you usually do.

You could also sync the converted Blu-ray movies via iCloud. But you need to know that iTunes will erase the existing movie files in your iPad tablets. Therefore, you'd better try 3rd-party iPad data transfer tool to help you transfer converted Blu-ray movies to iPad tablet. Leawo iTransfer for Mac could help you do this easily. As a professional iOS data transfer program, iTransfer could help you transfer up to 14 types of data and files between iOS devices (iPad, iPhone and iPod), computer and iTunes, without erasing existing files. The below steps would help you transfer converted movies from computer to iPad tablets:

1.Download and install Leawo iTransfer for Mac on your Mac computer.
2.Connect your iPad to your computer via USB cable. Leawo iTransfer would then scan your iPad device and display all info.
3.Open "iPad > LIBRARY > Movies" tab, and then click the "Add" button at the top of the right panel to browse and add converted Blu-ray movies.

After transferring converted Blu-ray movies to iPad via Leawo iTransfer, disconnect your iPad from computer and then you will see the converted Blu-ray movies on your iPad.

For more details, check: How to Rip and Convert Blu-Ray to iPad

If you want to play the Blu-ray movie on your iPad Mini, you can try ripping the Blu-ray to your computer first in a format that's compatible with your iPad Mini, like MP4. But you'll need a Blu-ray drive to do so. Here's how to rip Blu-ray to MP4: How to Rip and Convert Blu ray to MP4 with Blu ray to MP4 Converter Afterwards, you can transfer the MP4 video to your iPad mini with iTunes and enjoy the movie.

If you have a Blu-ray driver, then you can use Pavtube BDMagic to backup your Blu-ray to MP4 on hard driver, and then transfer to your iPad mini via itunes.

It is possible to play Blu-ray movies on iPad Mini and with a blu ray to ipad converter. If you just want to know how to do it, you can read this guide.
convert blu ray to ipad

Use blu ray ripper: http://www.bdconverter.com/blu-ray-ripper/
The guide: http://www.bdconverter.com/tips-on-ripping-blu-ray-to-ipad-mini-for-playback/