WHEEL_UP        seek             5
WHEEL_DOWN      seek            -5

Alt+=           add video-zoom   0.1
Alt++           add video-zoom   0.05
Alt+-           add video-zoom  -0.1
Alt+_           add video-zoom  -0.05

Shift+Alt+UP    add video-pan-y  0.05
Shift+Alt+DOWN  add video-pan-y -0.05
Shift+Alt+LEFT  add video-pan-x  0.05
Shift+Alt+RIGHT add video-pan-x -0.05

UP              add volume       5
DOWN            add volume      -5