Comment by dzhiurgis

We run into this issue when watching Korean movies/dramas. My wife prefers Japanese subtitles and I prefer English/German. I haven’t found a way to enable two subtitles in Firefox (via extensions). So in those cases I usually download a release which contains subtitles in both languages and use a script to extract them via ffmpeg and then combine them into a single srt. Now the issue is that the lines of the different languages don’t always appear/disappear at the same time. This leads to text jumping up and down. I have tried to mitigate it by injecting white space where only one line is visible, but this again fails when the video player breaks long lines or when the location of the subs change to the top (because there is hard-coded text in the image). I feel like there must be a better way…