I'm working on a very big project with about 4 hours of footage and over 80 intervals within the footage that I want to mark and then change the speed to. I have all of the times of the different intervals in a spreadsheet and I'm trying to figure out a way to import all of the markers into After Effects at once. Is this possible?
As I mentioned on the Premiere forum, you can copy and paste After Effects time-remapping keyframing data as tab-delimited values. That means you can copy the basic keyframes out of Ae and paste in Excel, bring your own data in according to that format, and then copy and paste out of Excel back into Ae.