For all the the people, who need a working example right now, here you go:
.sp-slider .sp-item.active .sp-background{
animation: zoom 25s;
}
@keyframes zoom {
from {
transform: scale(1);
}
to {
transform: scale(1.5);
}
}
Just add the Code in a custom.css file, and you`re good.
You can change the animation time:
shorter (e.G. 20 sek) > effect is faster
longer (e.G. 30 sek) > effect is slower
It`s been over 3 years now since the original poster "Andreas" asked about this popular feature !
It´s a shame.