Pavtube Free DVDAid is able to rip, encode and edit DVD disc, DVD folder, and DVD ISO/IFO file to MKV, AVI, MOV, WMV, VOB and more file formats. Without extra payment, you could own a freeware to help with DVD to video/audio transition which enables you to watch DVDs on other multimedia players without limitation. Plus, with the built-in video editor, you could easily edit source DVD video like trimming, cropping, splitting, adding subtitles, etc