You can search and download a subtitle with this cli tool.

Download lara-subs file and create config file in same directory. Example config file below.

OPENSUBTITLE_API_KEY=
OPENSUBTITLE_API_NAME=
OPENSUBTITLE_USERNAME=
OPENSUBTITLE_PASSWORD=

To search for subtitles for movies or TV series in a specific directory, use the --path parameter.

lara-subs find --path "/Movies/The.Matrix"
lara-subs find --path "/Movies/How.I.Met.Your.Mother"

Use the --title parameter to search by movie or series title.

lara-subs find --title "the natrix"
lara-subs find --title "how i met your mother"

OpenSubtitles account and an api consumer