VLC Rollback on Pause Plugin

rollback.lua

function descriptor()
   return {
      title = "Rollback X Seconds",
      capabilities = {"input-listener", "playing-listener"}
   }
end

function activate()
end
function close()
end
function deactivate()
end

function input_changed()
end

function playing_changed()
    local TIME_DELTA = -3

    if vlc.playlist.status()=="paused" then

        local timePassed = vlc.var.get(vlc.object.input(), "time")
        local newTime = timePassed + TIME_DELTA

        vlc.osd.message(TIME_DELTA, vlc.osd.channel_register(), "top-left", 1400000)        
        vlc.var.set(vlc.object.input(), "time", newTime)
    end
end