The steps below explain how you can convert movies and TV shows for your Apple iPad 4 from your existing collection, so that you can watch them on your iPad 4, without having to purchase your favorite movies again through iTunes.
Step 1: Download and install DVD Catalyst 4 on your computer.
You can purchase DVD Catalyst 4 (for a limited time 50% off) for only $10 by clicking here (link), or download the free trial version by clicking here (link) The trial version converts 25% of each item.
Step 2: Start DVD Catalyst 4 and select the Apple iPad 4 video player device profile.
Step 3: Insert your DVD or drag your video files over onto DVD Catalyst 4, and tap Go to start the conversion process.
After the conversion is completed, you can transfer the movie over to your iPad 4.
Detailed guide located here: