`vo=libmpv` reports OpenGL `INVALID_ENUM` when creating some textures

mpv Information

mpv v0.39.0-82-gfb9ac9b570 Copyright © 2000-2024 mpv/MPlayer/mplayer2 projects
libplacebo version: v7.349.0 (v7.349.0-rc1-dirty)
FFmpeg version: 6.1.2
FFmpeg library versions:
   libavcodec      60.31.102
   libavdevice     60.3.100
   libavfilter     9.12.100
   libavformat     60.16.100
   libavutil       58.29.100
   libswresample   4.12.100
   libswscale      7.5.100

Other Information

- Linux version: Gentoo
- Kernel Version: 6.6.47-gentoo-x86_64
- GPU Model: GeForce RTX 4090
- Mesa/GPU Driver Version: 4.6.0 NVIDIA 560.35.03
- Window Manager and Version: Plasma 6.1.5
- Source mpv: emerge (built from source)
- Introduced in version: Reproduced on v0.38.0, verified to happen on v0.34.0 in #13228

Reproduction Steps

1. Build qt_opengl example without mpv::qt::set_option_variant(mpv, "hwdec", "auto");.
2. Open a file.

Expected Behavior

Video plays without issue and no INVALID_ENUM errors are written to console or logs.

Actual Behavior

Creating several textures in OpenGL fails with the INVALID_ENUM error. Playback is otherwise normal.

[   8.285][v][libmpv_render] Texture for plane 0: 1280x720
[   8.285][e][libmpv_render] after creating texture: OpenGL error INVALID_ENUM.

[   8.308][d][libmpv_render] Resizing texture: 480x270
[   8.308][e][libmpv_render] after creating texture: OpenGL error INVALID_ENUM.

Log File

https://0x0.st/XEIi.txt

Sample Files

Source code for the lightly modified qt_opengl example I used: https://files.catbox.moe/dvv86a.zip

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.

Build and run the libmpv/qt_opengl example using the reproduction conditions, then inspect the linked log and the supplied example source. Trace the texture-creation path that emits INVALID_ENUM for the affected OpenGL textures. Done means video playback remains functional without INVALID_ENUM errors in the console or logs.