How to keep own proportions for the width of images and videos but at the same fixed height in a Carousel Slider Revolution?

Hello, I bought Slider Revolution 6 and Essential Grid.
I create a Carousel with Slider Revolution with images and video contents.
I’m trying to figure out how to keep slider proportion in width and keep them at the same height.
I attach here an image on how it should be.

Thanks in advance for your support.