Translates a .srt file via deepl.com (Made for GCI 2017). It only works for small files currently due to DeepL's rate limiting on their private API.
Binaries are available in the releases page. Alternatively, if Go is installed, this program can be built from source.
$ dep ensure
$ go install
$ translate-srt
$ translate-srt -input input.srt -output output.srt -from EN -to DE