Hello I have a DVD that has trivia facts with custom graphics that move about on screen, originally intended to be toggled on and off by toggling the subtitles (otherwise I'd just get an srt file and be done with it). They are pic subs with an alpha channel and most software based video players struggle to display them at all (so far only xine and gnome's video player can display them properly, VLC can display them if you set the option to ignore DVD subtitle transparency then they are solid shaded and not like the original). I'd like to at least be able to burn them in on one version of the files so they can be viewed from a Jellyfin server, I rather not have to change the original opacity I want it to look like the source. I had a similar problem with another DVD and was able to use
Code:
ffmpeg -i input.mkv -filter_complex "[0:v][0:s]overlay[v]" -map "[v]" -map 0:a output.mkv
however at least with this command ffmpeg failed to burn them in visibly on this second DVD.