I've figured out how to composite 2 videos using the overlay command, but was wondering if there is also a way to offset or shift the 2nd video in time, so you don't see the overlayed video until after a certain amount of time has elapsed?
Yes, use the
See my answer here for specific usage examples: Fix an m4v video that has lagging audio (audio and video out of sync)
You want to supply two input files, offset one with
Note that you cannot use