Rip and convert a 3D Blu-Ray to 2D

[steady_eddy91]

Without getting into a fight about aspect ratios, is it technically possible to buy a 3D blu-ray, and mux the movie into a 2D MKV?

The reason I ask is there are a few examples of movies which are open-matte only on the 3D version. If this is possible, would there be an quality loss vs the 2D disc (considering it's a mux and not an encode).

Movies where the feature in 3D is different to 2D:

-Titanic (3D is open-matte 1.79:1, where as 2D is 2.35:1)
-Selected Marvel movies such as Guardians of the Galaxy, Doctor Strange, and others containing IMAX scenes (3D contains open matte framing for IMAX scenes, where as 2D contains 2.35:1 for the whole feature).

I'd never crop a 2.35:1 to fit my screen (gross), however if there is an official open-matte version containing additional space, I'd be interested to view, however I am not at all interested in watching in 3D.