If you want to play a 3D movie in a 2D screen, you can do it by setting
gl:stereo=3 as output driver, and then changing the aspect ratio of the movie to 16:9.
- smplayer_3d.png (6.29 KiB) Viewed 5180 times
According to the mplayer manual, the option stereo=3 is supported only by few cards.