This is a very comprehensive guide with actually reasonable examples and suggestions! I think there's really not much more to add here, because eventually you'

This is a very comprehensive guide with actually reasonable examples and suggestions! I think there's really not much more to add here, because eventually you'll be deep in the rabbithole that is FFmpeg, and you'll be browsing mailing lists, visiting Stack Exchange, etc. to get help. Cross-referencing the FFmpeg wiki wherever possible would be good, as there is so much outdated information on the Internet, and at least the wiki is a somewhat up-to-date reference.