VLC used to ignore my multimedia keyboard (old thinkpad) before I installed this (I'm on Mint 17 Qiana, 64 bit, Cinnamon). Note: (1) installing it isn't enough, it has to be enabled manually too: Go to Settings: switch them to "all" i.e. advanced mode; and under Interface -> Control Interfaces tick off the "LibNotify Notification Plugin". (2) Unfortunately after reinstall of crashed VLC I can't make this work anymore :-( ... I tried manual deletion of ~/.config/vlc/, but it makes no difference. I probably have to start liking the totem player (aka "Videos").
useful plugin in vlc