The Video Formats Supported by Apple iPad Include:
H.264 video up to 720p, 30 frames per second, Main Profile level 3.1 with AAC-LC audio up to 160 Kbps, 48kHz, stereo audio in .m4v, .mp4, and .mov file formats;
MPEG-4 video, up to 2.5 Mbps, 640 by 480 pixels, 30 frames per second, Simple Profile with AAC-LC audio up to 160 Kbps, 48kHz, stereo audio in .m4v, .mp4, and .mov file formats;
Now how to put DVD on iPad to enjoy, what you need to do is simply rip the DVD movies into a video/audio format supported by iPad. After you have the files in a compatible format upload them into your iPad through the sync of iTunes Library.
Steps: How to Convert DVD to iPad
Step 1: Add DVD files
Free download DVD to iPad Converter. Installing it and then running it. Click "To DVD" Option on the main interface. Then click "Open DVD" button to locate the DVDs.
Step 2: Choose output formats
To choose the proper profile look for the drop-down list of "Profile" option on the right. Then select a folder to save the converted DVDs by clicking "Output" button. Click "Convert" button to start to convert DVD to iPad playable format.
Step 3: Put DVD on iPad
After the conversion is done, connect your iPad to Computer. Open the iTunes, add the converted DVD Videos to iTunes, Sync them to your iPad. Now you can enjoy your iPad from iTunes and watch DVD videos on your iPad.