This is a utility to produce bi-lingual subtitle tracks. It is shipped as both a web application or command-line utility.
You need two SRT-formatted subtitle tracks as input. Since SRT cannot hold tow subtitle tracks, we output a single SSA-formatted file.
These formats can be understood by media players such as VLC.
composer install
cd public && php -S localhost:8080
composer install
php bin/2srt2ssa --help