Here you can find some usefull tips of using ffmpeg library

Nowadays rollback to any particular version of the Homebrew package might be tricky since the commands brew versions <package> and brew switch <package> <version> are deprecated and no more available.

Apple has a powerful URL Loading System which can be used in various ways with a bunch of most common URL schemes. It also includes the URLProtocol, a class that can intercept all network requests for different purposes. You can use it for analytics, testing, and even profiling your application.

The Dependency Inversion Principle is the last one from SOLID stands for decoupling the system into independent modules. It means that one part of a system should not depend on another one directly.

Let's see an example.