A question asks to have a command-line invocation of FFmpeg reviewed. Is that reviewable code?
Let's not discuss whether a shell command containing an AWK one-liner is on-topic; such a post could be considered a question about awk as a programming language.
Does the complexity of the tool matter? FFmpeg, as a suite of command-line programs (ignoring the FFmpeg library), has a lot of features.
What if it were two shell commands to be invoked in succession?