RatDVD

RatDVD (originally stylized "ratDVD") is the name of a proprietary container format for digital video, developed by Peter Jensen and a group of Russian and Danish university students.

Unlike other container formats like Matroska, it is designed to accurately mirror the exact feature set of standard video DVDs, facilitating round-tripping back to the DVD-Video format.

[1] RatDVD files are created by a computer program of the same name.

[3] The resulting RatDVD file can then be played directly on a computer (as long as the needed codec has been installed) with a DirectShow-compatible DVD player, or converted back into standard DVD format.

[1] RatDVD program is freeware and works on Microsoft Windows.