Blu-ray Disc (official abbreviation BD) is an optical disc storage medium designed to supersede the DVD format. The format defines as its standard physical media a 12 cm (same as DVDs and CDs), 25 GB per-layer optical disc, with dual layer discs (50 GB) the norm for feature-length video discs and additional layers possible later.

The name Blu-ray Disc refers to the blue laser used to read the disc, which allows for six times more storage than on a DVD. The term Blu was used instead of the correct Blue which is commonly used in English (and therefore not registrable as a trademark).

However, I found many people want to know how to import AVCHD to QuickTime Mac as below.

Q1: The best format for playback blu ray dvd movies on ipad,iphone 4,apple tv,ipod touch 4?
Many folks have taken advantages of the Retina display by copying DVD and blu-ray movie collections to iTunes and transferring them to their iPad, iPhone 4 or iPod Touch 4 for playback.
Is there a general format that is compatible with iPad, iPhone 4 and iPod Touch 4? No one would be pleased to rip one movie twice just because i owns iPad and apple tv!

Luckily, a friend of mine recommended me a Blu-ray to iTunes Converter Mac which he tried very great. I download the free trial and found it's very easy to use, and can add Blu-ray to iTunes for Mac OS. Then I bought it without any hesitating. If you have the same problem with me, maybe you can try it. Learn the details about how to add Blu-ray to iTunes Mac! Hope to help you.)))