How did older films edit in the credits, specifically in actual footage?

Question

Clarification: Actual footage meaning something that was filmed and not just black backgrounds.

In: Technology

Answer 1

To add on to what /u/FullMetalDove said, there’s also the process of [optical printing](https://en.m.wikipedia.org/wiki/Optical_printer?wprov=sfla1), which is setup that takes footage of film. You matte out where the credits will go, which leaves the credits area unexposed, rewind the film and shoot the credits again, with the negative space matted out this time.