mpv subprocess create failed

[Keith94]

Sample file

DV-sample.mkv.zip (from: Alien.Romulus.2024.DV.2160p.WEB.H265-ETHEL.mkv)

Log file

log.txt

Version info

mpv 5c59f8a Copyright © 2000-2024 mpv/MPlayer/mplayer2 projects
built on Oct 24 2024 20:25:51
libplacebo version: v7.349.0
FFmpeg version: b862792
FFmpeg library versions:
libavcodec 61.19.100
libavdevice 61.3.100
libavfilter 10.4.100
libavformat 61.7.100
libavutil 59.39.100
libswresample 5.3.100
libswscale 8.3.100

[Keith94]

A workaround/solution is to set tone_mapping=no. Bug only seems to happen with dolby vision color matrix.

[XSpark0]

This error is showing on every mp4 mkv video i play in mpv 0.39

[AKL55]

I'm having this issue on every video after updating thumbast.
I tried updating mpv after, but the issue persists.

mpv v0.39.0-938-g2542a7824 Copyright © 2000-2025 mpv/MPlayer/mplayer2 projects
built on Mar 4 2025 00:11:14
libplacebo version: v7.350.0 (v7.349.0-38-g02f4f98-dirty)
FFmpeg version: N-118608-g25c439296
FFmpeg library versions:
libavcodec 61.33.102
libavdevice 61.4.100
libavfilter 10.9.100
libavformat 61.9.107
libavutil 59.58.100
libswresample 5.4.100
libswscale 8.13.100

Edit:

Seems like commit 9deb073 causes the issue for me.
The issue is not consistent.