I had fun some years ago working on some sentiment analysis, and found if you took subtitles you could often see where general changes happened. Splitting that

I had fun some years ago working on some sentiment analysis, and found if you took subtitles you could often see where general changes happened. Splitting that over where the histogram jumped you could more reasonably split things over camera cuts. Plot an exponentially smoothed sentiment and you could see patterns for types of content (sadness then uplift at the end of current affairs shows for example). I built it for auto-summarisation of video and categorisation as a few day hack and it was OK (better than I expected, not good enough to use). Totally failed at sports though, as the commentary usually has more varied speech when there's little happening.