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How does scaling nested sequences work?
I have a CHILD sequence whose resolution is 1920×1080. All of the footage in this sequence is 3840×2160. All of the clips are scaled down 50%. This approach is used so that I can zoom and pan the footage as needed using SCALE and POSITION. Make sense? OK.
Now I take the above sequence and NEST it inside a PARENT sequence. The PARENT sequence is 1920×1080. I need this PARENT sequence because I want to apply effects to the entire sequence, not the individual clips.
So now I’m working exclusively with the PARENT sequence. I’m never going to touch the CHILD again.
So here is the question. To scale/zoom the footage from within the PARENT sequence, I’m going from 100% up to 200% scale. Under normal circumstances that would be a bad practice. But in my case my source footage in the CHILD sequence is 3840×2160. So 200% should actually be my “native/original” resolution. Right? Is Premiere smart enough to figure that out? Or is Premiere actually scaling down from 3840×2160 to 1920×1080 and then back up to 3840×2160?
I assume that Premiere can figure out that 50% x 200% is actually 100% and it works from there. But obviously I am not sure, which is why I’m asking you all. And if I’m wrong, then how exactly should I be doing this? And by THIS I mean, working with 4K footage in a 1080p sequence for the purpose of scaling and panning, while taking advantage of a nested sequence workflow.
Thanks for the insights!