With youtube-dl, you can get the video filename (--get-filename) and you can get the list of available subtitles (--list-subs), but it doesn't seem to have anyway to retrieve the file name of the downloaded subtitles.
If I want to only download the subtitles of a video, I'd do something like this:
youtube-dl.exe --write-sub --sub-format best --sub-lang en --skip-download -o "~/Videos/%%(title)s.%%(ext)s" YOUTUBE_URL
Then, the subtitle would download as
TITLE-en.EXTENSION
But if I do something like this
youtube-dl.exe --write-sub --sub-format best --sub-lang en --skip-download -o "~/Videos/%%(title)s.%%(ext)s" YOUTUBE_URL --get-filename
It only gives me the filename of the video.
Any help?