Video length and frame rate with Lottie animation on scroll

Hi guys,
I’m working with Lottie and the video trigger on scroll and I’m trying to understand the precise frame rate and length of a video to complete a viewport. In other words do you know a method to calculate how many video frame I move with a single scroll in order to now how long it need to be the Lottie video section?

I know it’s a difficult question, hope somebody could help me!
Thanks


Here is my public share link: LINK
(how to access public share link)