HandBrake is an open-source, GPL-licensed, multiplatform, multithreaded video transcoder, available for MacOS X, Linux and Windows.
It is my preferred application at this current point in time for ripping video from DVDs. It provides a very sleek GUI that is easy to navigate and intuitive to use. It supports queuing media tracks and x264 encoding to .m4v files. Also worth mentioning is that HandBrake is not included in the Ubuntu repositories, however it is still FOSS.
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