Bug: External .ass subtitles ignoring embedded MKV fonts in Infuse 8.5

Video Playback
1

I have noticed a bug regarding subtitle rendering since updating to Infuse 8.5.

Currently, if I use an external .ass subtitle file alongside an .mkv video, Infuse fails to recognise and apply the fonts embedded within the .mkv container. The subtitles end up displaying in a standard font instead of the intended ones from the .mkv.

This was working perfectly fine in the previous version of Infuse.

As a workaround, if I mux the .ass subtitle file directly into the .mkv container, the fonts are applied correctly and display as normal. It appears the issue is specifically related to how version 8.5 handles external .ass files combined with internal .mkv fonts.

System Details:

  • Device: Apple TV 4K (A15)

  • OS: tvOS 26.6

  • Infuse Version: 8.5

Please look into this regression?

Thanks.

2

Would you be able send in one of these subtitle files we can review here?

3

I have uploaded the files. To help you reproduce the issue, I have included three files:

  • external.mkv & external.ass: Please test these two together. The .mkv container includes the embedded font files. However, when playing it with the external .ass subtitle, you will see that Infuse fails to load those embedded fonts.

  • combined.mkv: This serves as a working example. It is the exact same video, but I have muxed the .ass file directly into the container. When playing this version, the fonts render perfectly.

Please look into this.

Thanks.

4

Hi @james

Just a quick update: I have installed the new 8.5.1 release, but the bug is still present.

I also tested this on the iPhone version of Infuse (both 8.5 and 8.5.1), and exactly the same issue occurs.

Have you guys had a chance to test the files I uploaded previously and reproduce the problem on your end?

Thanks.

Update: However, if I play these exact same files using the much older Infuse Pro 6, the fonts render perfectly.

5

Same.

6

我也是这样，外挂.ass文件不能在infuse 8.5.1中被识别，播放影视文件没有.ass对应的字幕显示，影视文件和.ass字幕文件都在直连的光鸭云盘中

但是，百度云盘中同样的影视文件和.ass字幕文件显示就很正常，不知道这个问题和光鸭云盘是否有关系，请查一查原因并纠正这个问题，谢谢！ @james