So people transcribing audio/video content should be paying for the opportunity to do so? They are quite literally offering a service based on derivative work.
Surely this is already ironed out, no? What are laws regarding transcriptions?
No, they don't get to at all if they're creating something that takes away from sales of the original item.
Yes this is ironed out. It's completely illegal, as it should be. No question about it.
If you're translating subtitles (without accompanying images) for someone to use together with the original media, then there's a good argument that's legal (even though many courts disagree), since you're not taking away from sales -- you might even be helping with them.
But creating a comic-book version of a movie you can read instead of watch? That's just blatant copyright infringement, period.