[FFmpeg-user] MKV to MP4 subtitle issue

[Moritz Barsnick]

On Tue, Jan 17, 2023 at 10:02:59 +0100, pehache wrote:
> > MP4 cannot carry those HDMV PGS subtitles (or any other bitmap based
> > format, if I remember correctly).
>
> MP4 can carry the DVDSUB format, which is bitmap.

Ah great, sorry, I wasn't aware (anymore)

> The OP can give a try transcoding the PGS subtitles to DVDSUB, using "-c:s
> dvdsub", but in my (limited) experience it often fails for some reason or
> another.

Indeed, I have always had problems converting any bitmap-based format
to dvdsub. I may dig into it again, but the original poster should
perhaps just try.

Moritz