Rip DVD Plus is specifically designed for ripping DVD's. With Rip DVD Plus can rip individual titles and chapters or rip the entire disc. To merge the ripped sections, select the checkbox 'Merge to a single file'. Ripping with subtitles is supported, and you can also apply effects to adjust brightness, contrast, and audio volume. A full overview of Rip DVD Plus is available here. Or download a free evaluation version and try it out.