does anyone know of a complete system or player to automatically generate subtitles based on speech recognition (apart from YouTube)? there are a lot of older

does anyone know of a complete system or player to automatically generate subtitles based on speech recognition (apart from YouTube)? there are a lot of older series/movies with where the speech is hard to discern but no subtitles are available for download. i have been thinking about creating an AutoSubtitle app for years, but haven't had a free day to tackle it - hope someone else beats me to it.