A well-meaning advice: it's great when TOC and a sample chapter is there (it's almost mandatory for me to consider a self-published book from an author I don't already know).
But that chapter shouldn't simply be the first n pages covering "what is ffmpeg", "where do I download ffmpeg" and "how do I install ffmpeg".
Show us a practical example what cool things I can do with ffmpeg. Your TOC is enticing, pick one of those things (OPUS or audio from waveform or whatever) and show that! Including the command line and your explanation up to it.
So far I have no idea whether you explain anything, or whether you're just listing "100 cool one-liners".
(The latter may also be fine, but I don't know what I'm buying here)
But that chapter shouldn't simply be the first n pages covering "what is ffmpeg", "where do I download ffmpeg" and "how do I install ffmpeg".
Show us a practical example what cool things I can do with ffmpeg. Your TOC is enticing, pick one of those things (OPUS or audio from waveform or whatever) and show that! Including the command line and your explanation up to it.
So far I have no idea whether you explain anything, or whether you're just listing "100 cool one-liners".
(The latter may also be fine, but I don't know what I'm buying here)