ratDVD takes a full featured DVD movie and puts it into a highly compressed .ratDVD container format file of about 1.x GB in size - while preserving all the features of the original DVD such as: Full anamorphic picture, seamless branching, multiple video angles, multiple audio channels, subpictures, etc.; Keep movie versions (Directors Cut, Theatrical version, etc.), Alternate story endings, making of, video commentary , cut scenes, etc.; Keep complete menus, navigation and features; Reliable high quality, valid check-summed container.