With VLC I can use the menu of a DVD (not all, some protected dvd's won't play).
Open the directory and it will play the menu; I use the arrow keys to select a menu item and enter to start it.
In the playback menu of vlc you can select titles and then the chapters of the dvd.
SMplayer / MPlayer crash, exit code: 127
I had this problem too. Solved it by extracting libx264.so.118 from
the previous version of x264 in var/cache/pacman/pkg and copying it to /usr/lib/.
The dvd menu in smplayer is activated by shift + arrow up, down left, right and entering or clicking to activate selection.