Smart Chapter Seeking (Go to next/prev playlist file if no chapter is found)

Expected behavior of the wanted feature

The behavior created with this script: https://github.com/mpv-player/mpv/issues/4738#issuecomment-321298846

I would like that to be default

I've been using that script for years now, and I'm surprised this feature hasn't been implemented in mpv yet.

This behavior goes particularly well with the autocreate-playlist option:

directory-mode=ignore
directory-filter-types=video
autocreate-playlist=filter

I consider it a necessary part of my experience and I know at laest one other popular player (mpc-hc) does this by default too (though it's been years since I used that)

Alternative behavior of the wanted feature

Instead of making it the default behavior of add chapter, an alternative command would be fine, something like add chapter_smart maybe.

Log File

N/A

Sample Files

N/A

Start by reading the linked script and the handling for the add chapter command, along with the autocreate-playlist options mentioned in the issue. Done means chapter seeking can move to the next or previous playlist file when no chapter is found, either by default or through a separate command.