Change Text or Text Font of PGS Subtitles

[jay123210599]

How do I change the text or the text font of PGS subtitles without needing to convert to .srt or .ass first?

[StainlessS]

I think that PGS files are actually image files, so you DO need to use some kind of OCR to extract text,
before any change to the text or font.

[wswartzendruber]

Yes, PGS subtitles are entirely bitmap-based.