SubDB-Node is a simple wrapper for the awesome thesubdb.com API. The package exposes a main function download which takes in a file path and downloads a subtitle in the same directory with the same filename as the video.
npm i subdb-node to use the API.
npm i -g subdb-node to use the commandline tool.
const subdb = require('node-subdb')
subdb.download('path-to-video-file')
The function returns a Promise which resolves to true if a subtitle is found and downloaded. It returns null if no subtitles were found.
subdb <filePath>