@nixCraft I feel ya. ffmpeg is so superior that a surprising amount of commercial video transcoding products use it as their base, and makers of transcoding hardware even feel forced to contribute to it b/c it's so ubiquitous. Despite all that the documentation and codebase are not always very... intuitive!

(I would've put that whole `filter_complex` line in a filter script though, at some point they become too big to be put on a single command-line!)