Unable to encode due to lack of "Frame Rate info node"

[DUGUJACK]

Good news: I can reproduce the issue with your source.
Bad news: new clue what is wrong with these subtitles.
What tool did you use to create/extract them?

Cu Selur

Thanks for your test. It was easyavs2bdnxml that was used to create the subtitle from the .ass file by someone I know in order to prevent others from editing it again in theory. And only a few people know how to burn the .sup file into video, so it's a safest way to share the .sup file with others.