In chrome extensions, is there a way to record screen without ssl?

问题

I'm not sure if this is possible but is there a way to capture screen using an extension without an https url and without going into native code? Does chrome provide some kind of API call for capturing screen with a compression codec that doesn't involve chrome.desktopCapture?

I'm also wondering how something like screencastify works, where does one begin with trying to build something like this?

来源：https://stackoverflow.com/questions/29035215/in-chrome-extensions-is-there-a-way-to-record-screen-without-ssl