Punctuation incorrect in RTL subtitles #6385

IINA Version

1.5.0-beta2

Release Channel

Beta

macOS Version

macOS 15.7.9

Steps to Reproduce

Play a video using the attached subtitle file. Note that the position of the punctuation in the subtitle is incorrect:

Expected Behavior

Punctuation in RTL subtitles is in the correct position for a right-to-left language.

Actual Behavior

As seen in the above screenshot the punctuation in the subtitle is in the wrong position. This problem was reported in the IINA Telegram Group chat.

The root cause appears to be the issue libass/libass#741. IINA will need to keep an eye on that issue and upgrade libass once it is fixed.

Crash Report or Process Sample

No response

Logs

No response

Sample Files

big_buck_bunny.ass.zip

How often can you reproduce the issue

Every time.

Required Actions

• I tried my best to search from the existing issues (including closed issues) and didn't find duplicated issues.

Optional Actions

• I tested with the Nightly build and confirmed the issue is not fixed.
• I tested with the latest version of mpv and confirmed mpv doesn't have this issue.