Imagine that you are a movie fan and have a lot of DVDs in your collection. Every time you want to watch a movie, you have to find the DVD and put it in a DVD player. However, one day, your DVD player is broken. So you cannot watch the movie until you get the DVD player fixed. In case this situation really happens, using DVD ripper to convert DVD to AVI is a good choice for you. With this method, you can keep all your movies on your computer or other devices. How can you do it? Two video converting software below is necessary.