ERROR: Postprocessing: in the active code page (932).

[YukiNagat0]

Hello, I'm not sure if I'm writing to the right place, but I'm facing the following problem: when trying to process a video with UTF-8 characters in its name using the ffmpeg utility contained in this biuld, an ERROR: Postprocessing: in the active code page (932). error appears.

Method of reproducing the error:
On the latest release (https://github.com/shinchiro/mpv-winbuild-cmake/releases/tag/20241113), try to download a video via yt-dlp (which is included in the build) with UTF-8 character in its name. For example: yt-dlp “https://youtu.be/xtmgLRqDPFs?si=01zqHBOG4cBhsSsA”. This results in following message:

PS D:\> yt-dlp "https://youtu.be/xtmgLRqDPFs?si=01zqHBOG4cBhsSsA"
[youtube] Extracting URL: https://youtu.be/xtmgLRqDPFs?si=01zqHBOG4cBhsSsA
[youtube] xtmgLRqDPFs: Downloading webpage
[youtube] xtmgLRqDPFs: Downloading ios player API JSON
[youtube] xtmgLRqDPFs: Downloading mweb player API JSON
[youtube] xtmgLRqDPFs: Downloading m3u8 information
[info] xtmgLRqDPFs: Downloading 1 format(s): 401+251
[download] Destination: 🦋 [xtmgLRqDPFs].f401.mp4
[download] 100% of   19.89MiB in 00:00:07 at 2.53MiB/s
[download] Destination: 🦋 [xtmgLRqDPFs].f251.webm
[download] 100% of    1.21MiB in 00:00:00 at 1.32MiB/s
[Merger] Merging formats into "🦋 [xtmgLRqDPFs].webm"
ERROR: Postprocessing: in the active code page (932).

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This error started to appear about a week ago, and it seems that it is related to mingw-w64: msys2/MINGW-packages#22462

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Environment info:

OS: Windows 11 24H2
Locale: Japanese (Japan) (beta system-wide UTF-8 support is disabled)
Terminal: Windows Terminal
Shell: PowerShell 7
mpv: mpv-x86_64-v3-20241113-git-43d8966.7z
yt-dlp: 2024.11.04
ffmpeg: ffmpeg-x86_64-v3-git-e35587250.7z