The MKV format (Matroska Video) is an entirely free video format. More precisely, it is a container making it possible to contain video (DivX, Xvid, RV9, etc), sound (MP3, MP2, AC3, Ogg, AAC, DTS, PCM), as well as subtitles (SRT, ASS, SSA, USF, etc) in the same file, other MKA for audio-only files and MKS for subtitles only. High Definition movies in 720 or 1080 pixel width format are often encoded and packaged as a Matroska format video with a MKV file extension. MKV files usually have a menu system slightly similar to a DVD menu, tools and libraries that allow developers to add MKV support to their applications, an audio/video cross-platform in a multimedia container format and streaming facilities over the internet. MKV has been licensed as an open source container format and is hence free for public distribution.
Many DVD collectors want to convert DVD to MKV (or HD MKV) video for wider playback. But they alway have problem to do that becuase of the DVD protection. Mac The Ripper is a totally free DVD Ripper (extractor) for Mac OS X which can minus all the copy protection and region controls put in place by DVD publishers and extract commercial DVD movies to your hard drive,
Part 1, How to rip DVD using Mac The Ripper.
Step 1, Download Mac The Ripper.
http://www.mactheripper.org
Step 2, Rip and copy DVD for free. Insert your DVD movie into your DVD drive and launch the MacTheRipper. There are two major setting parts: Disc and Mode.
REC Region settings:
UOPS: Allow you to skip or fast-forward through most DVD content, such as warning screens, previews etc.
RCE Region:
If MacTheRipper displays "DISC RCE: CLEAR" after scanning the DVD, you can leave the option to OFF status.
If MacTheRipper displays "DISC RCE: -DETECTED-", you must set the option to the region in which the DVD was purchased.
De-Macrovision: Allow you to record your DVDs straight to VCR, or connect the DVD player through a VCR without getting a bunch of wavy lines. This is enabled by default.
Mode setting: Select the Full Disc Extraction Mode to reserve all the info in the inserted DVD disc.

Step 3, Complete DVD Ripping. You can find a folder in the save location. The output files extracted by MacTheRipper are saved as .VOB format.

Part 2, How to convert DVD to MKV (or HD MKV)video for Mac OS X?
Now, you need to convert the ripped DVD (.VOB) to MKV (HD MKV) on Mac OS. But Mac The Ripper could only make a copy of your DVD, but not convert DVD to MKV video. Thus, you have to find a free video converter iSquint to convert the VOB to MKV.
Want to convert DVD to HD MKV (H.264, Xvid), and don’t want to mess around with these complicated applications? You can choose Wondershare Video Converter Pro for Mac to rip DVD to MKV with only a few clicks!
