loadfile command ignores start option

[PalmtopTiger]

mpv Information

mpv v0.39.0-507-g32d103c5 Copyright © 2000-2024 mpv/MPlayer/mplayer2 projects
 built on Dec 18 2024 00:11:08
libplacebo version: v7.350.0 (v7.349.0-30-g056b852-dirty)
FFmpeg version: N-118091-gb38f6f999
FFmpeg library versions:
   libavcodec      61.27.101
   libavdevice     61.4.100
   libavfilter     10.6.101
   libavformat     61.9.101
   libavutil       59.51.100
   libswresample   5.4.100
   libswscale      8.12.100

Other Information

- Windows version: 10.0.19045.5131
- GPU model, driver and version: AMD Radeon RX 7900 GRE PURE, driver 24.12.1
- Source of mpv: https://github.com/shinchiro/mpv-winbuild-cmake/releases/download/20241219/mpv-x86_64-v3-20241219-git-32d103c.7z
- Latest known working version: -
- Issue started after the following happened: -

Reproduction Steps

1. Launch mpv.
2. Open console.
3. Run this command: loadfile "some file path" replace -1 start=1000

The bug is reproducible both with the latest build and with the stable version 0.39.0.

I discovered this behavior while developing the script.

mp.commandv("loadfile", "some file path", "replace", -1, "start=1000")

Expected Behavior

Playback starts from the specified position.

Actual Behavior

Playback resumes from the position where mpv was closed last time.

Log File

output.txt

Sample Files

No response

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

• I tested with the latest mpv version to validate that the issue is not already fixed.
• I provided all required information including system and mpv version.
• 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.
• I produced the log file while the behaviors described in "Actual Behavior" were actively observed.
• I attached the full, untruncated log file.
• I attached the backtrace in the case of a crash.

[PalmtopTiger]

This is not related to this bug, but with the latest build the GPU driver displayed an error message about some failure several times. This doesn't happen with the stable build 0.39.0.
output_driver_failure.txt