Vamps is a tool to help backing up DVDs: Vamps evaporates DVD compliant MPEG2 program streams by selectively copying audio and subpicture tracks and by re-quantizing the video stream. Shrink ratio may be based on video only or on the full PS.
Open source project that offer summary and download services on this page is a project that carry out their development work on other open source development sites. Their work is linked to this page via a feature called OFI, and their work is not carried out here on OSDN site.