Mark Olson built a…well, let him explain:
Storyboard was born of my insane desire to consume videos without actually having to watch them. Normally that would involve putting the TV on in the background and ignoring the video while listening to the audio, but what about the reverse? All visual without the audio. On my kindle.
Feed Storyboard a subtitled MKV file in the command line and get a PDF transcript back (ePub and Mobi coming soon). Neat trick.