I've got a folder full of numbered .png files, along with a ttml2 (.xml) file and 2 .idx files. I am looking for a method to quickly convert this folder of files into a single .srt file. I've got Subtitle Edit, but it takes hours converting each folder, and I've got a lot of folders in many different languages I want to get converted, so that's not an option. I've noticed there's a free add-on you can use to instantly download an .srt version of the subtitles from the site, but it takes a significant amount of time to access all the different language subtitles I want to download, so I'd prefer not to do that. Accuracy is not critical, but, of course, the more accurate, the better.