--sub-scale applied when --sub-ass-override is set to yes

[low-batt]

mpv Information

mpv v0.38.0-344-g2fa66b850d Copyright © 2000-2024 mpv/MPlayer/mplayer2 projects
 built on May 24 2024 21:30:52
libplacebo version: v7.349.0 (v6.338.0-133-g9e1257c8)
FFmpeg version: n7.0
FFmpeg library versions:
   libavutil       59.8.100
   libavcodec      61.3.100
   libavformat     61.1.100
   libswscale      8.1.100
   libavfilter     10.1.100
   libswresample   5.1.100

Other Information

• macOS version: macOS 13.6.3 (22G436)
• Source of mpv: local build of master at 2fa66b850df1e0ecd653e9eea1e69fccc73afcee using mpv-build
• Introduced in version: unknown

Reproduction Steps

• Download the attached big_buck_bunny.ass.txt file
• Rename it to big_buck_bunny.ass
• Copy some video to big_buck_bunny.mp4 in the same directory to match up with subtitle file
• Play the video with --sub-scale=5 --sub-ass-override=no
• Play the video with --sub-scale=5 --sub-ass-override=yes
• Notice --sub-scale is applied with --sub-ass-override set to yes

Expected Behavior

I'm expecting:

• With --sub-ass-override=no, --sub-scale is ignored
• With --sub-ass-override=yes, --sub-scale is ignored
• With --sub-ass-override=scale, --sub-scale overrides ASS style

From the mpv manual entry for the sub-ass-override option:

• no: Render subtitles as specified by the subtitle scripts, without overrides.
• yes: Apply all the --sub-ass-* style override options. Changing the default for any of these options can lead to incorrect subtitle rendering (default).
• scale: Like yes, but also apply --sub-scale.

Actual Behavior

With --sub-ass-override=yes, --sub-scale is applied and overrides ASS style. The --sub-ass-override=yes behavior matches the --sub-ass-override=scale behavior.

With --sub-ass-override=no:

mpv/build/mpv --log-file=mpv.log --no-config --autofit=2048 --pause --sub-scale=5 --sub-ass-override=no ~/Movies/big_buck_bunny.mp4

With --sub-ass-override=yes:

mpv/build/mpv --log-file=mpv.log --no-config --autofit=2048 --pause --start=1:08 --sub-scale=5 --sub-ass-override=yes ~/Movies/big_buck_bunny.mp4

With --sub-ass-override=scale it looks just like --sub-ass-override=yes.

Am I confused about how sub-ass-override is intended to work?

Log File

output.txt

Sample Files

big_buck_bunny.ass.txt

I carefully read all instruction and confirm that I did the following:

• [X] I tested with the latest mpv version to validate that the issue is not already fixed.
• [X] I provided all required information including system and mpv version.
• [X] I produced the log file with the exact same set of files, parameters, and conditions used in "Reproduction Steps", with the addition of --log-file=output.txt.
• [X] I produced the log file while the behaviors described in "Actual Behavior" were actively observed.
• [X] I attached the full, untruncated log file.
• [X] I attached the backtrace in the case of a crash.