Thanx.
I know what After Effects is, I just didn’t know how to deal with still images (frame rate issues in order to create a slide show 1-3fps vs. 30fps).
Anyways. I found a solution on Adobe web: https://www.adobe.com/support/techdocs/317681.html
and I successully created and output what I wanted from After Effects.
I thank you for your time though.