Say, does anyone know if there is any open source software that would do this (or for that matter, any software that isn't ridiculously expensive)? Years back,

Say, does anyone know if there is any open source software that would do this (or for that matter, any software that isn't ridiculously expensive)? Years back, I ran a workshop (applying group theory to understanding magnetism) and we recorded it. We got releases for the videos and have the bandwidth to put them on the web for free, but I believe that I have to have them subtitled in order to release them online. So, if people have asked for the videos in person, I've given out copies, but they're not generally available...Automation does seem to be the answer here...