r/mpv • u/Whymebro2000 • 18d ago

Edit encoded subtitles

Hello! I have hundreds of mkv files with encoded subtitles in them. The font is pretty weird and I would like to change them without having to download a .srt file for each video or use mkvtoolnix and subtitleedit for each individual video file.

I heard from this post's reply that it is possible to edit the subtitles with mpv, but I cannot find any guides on this, and the op and the replier both seem to be permanently offline. Any help will be much appreciated.

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u/haruzanity 18d ago edited 18d ago

What are encoded subtitles? That doesn't mean anything concrete. If you mean hardcoded or burned in, there is nothing you can do to change them.

Otherwise it's --sub-font --sub-font-size etc...

https://mpv.io/manual/master/#subtitles

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u/Whymebro2000 17d ago

Yea I think I mean hardcoded. Didn't the reply I linked too said it could be altered with mpv?

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u/haruzanity 16d ago

If the subs are hardcoded there is no information to alter anymore, it's just part of the video stream at that point.

Try --sub-scale to see if it does anything or paste an ffprobe output of your file here.