Multimedia applications are those programs that integrate more than one media at a time; browsers are the most obvious. However, the term has come to include the use of programs that enable the use of any component that isn’t simple text and static graphics, such as audio, video, animation, virtual reality, conferencing and monitoring.
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Best I recall, the sequence was...
1) Mount the DVD.
2) cd to DVD directory mount point.
3) cat VTS_O1_*.VOB > ~/file-title.vob
4) ffmpeg -i ~/file-title.vob ~/file-title.mp4
Well... #4 can have many options...
Point here is, you can fairly easily concatenate all VOB files into a contiguous file, you can then transcode, using ffmpeg or your transcoder of choice.