iFastime Video Converter Ultimate has been around for quite some time. It gives a good balance between power and ease of use. It can remove most of type of protections contained on DVD/Blu-ray disc through its decryption algorithm, and convert the movie files across an incredibly large array of formats including DVD/Blu-ray to AVI (.*wmv, .*mp4, .*mkv, .*mov, .flv). One of the nice things is its flexibility: the program is embedded with preset options to convert DVD for watching movies on just about every popular device, and lets you arrange several output settings to get full control over the quality/size of the exported video if you like.
If you are a Mac user, just get Video Converter Ultimate for Mac, and it is now compatible with Mac OS X 10.11 El Capitan.
Free download the top video converter for Windows:
Source: How to convert DVD to HD AVI Easily and Quickly?