is it possible to put timers in when playing mkv

here is what I would like to do

my lighting is controlled by lutron homeworks. What I want to happen is this
movie starts
lights dim say to 30% once the actual movie starts they turn off.
movie is done but credits are on lights are at 50% once movie is completely done light on full

this is just an early thought but the last part is for sure, one modification is once movie starts light just turn off