Subtitle font changed

[Crisophie]

Heya. I imported my local anime collection to my home server/Jellyfin and one anime's subtitles have completely changed font from what is displayed in VLC or similar media players.
The font JF selects to override/change the original is also different between seasons, despite source font being the same for both seasons. Haven't tested all my series, but this seems to be the only instance.
I'd rather not use the JF subtitle font setting and instead use the fonts as they should be. Is there any solution or could it be an issue with the source subtitles?

Running 10.8.10 on Windows.

Season 1 Example (JF vs VLC):


Season 2 Example (JF vs VLC):

[crobibero]

This looks like Jellyfin is using the subtitle font provided/specified in the media file. Are you sure both Jellyfin and VLC are using the same subtitle track? Which Jellyfin client are you using?

[Crisophie]

Just double checked and they are using the same sub track.
I'm using the web client, but the issue also is present on the webOS client.
Just installed the Jellyfin Media Player to check that, and it seems to be using the right font on that.

[skribe]

I don't believe all clients are able to support custom fonts. It might simply be the case that the WebOS client cannot use the embedded fonts. Something like Jellyfin Media Player does support custom fonts.

[crobibero]

Just want to clarify, which font are you expecting to see? The top or bottom of the image?

[Crisophie]

Bottom image in each set. Top one is web client/webOS client.

I tried changing the font in VLC settings to see if it was just using the VLC forced font, but it was not.

[H4M5TER]

You can use FFmpeg or mkvtoolnix to extract subtitles from mkv file and check which font is actually used. 

If the font is carried with mkv, the subtitles will always render with correct style.
If not, VLC or any other player will use system font. But I don't know how jellyfin-web behave.
Should I install the font on the Jellyfin side or the player side?

Following the direction of a blog I did some hack to make Jellyfin frontend to provide specified font from local folder when rendering ass sub.
It's kind of ugly. After compiling I put all the font on the assets/fonts folder. And fontNameMap.json is storing all the mapping from font name to its relative path.