strange colorful line at the bottom in some videos

mpv Information

mpv --version
mpv v0.38.0-dirty Copyright © 2000-2024 mpv/MPlayer/mplayer2 projects
 built on May 23 2024 10:29:03
libplacebo version: v6.338.2
FFmpeg version: n6.1.1
FFmpeg library versions:
   libavutil       58.29.100
   libavcodec      60.31.102
   libavformat     60.16.100
   libswscale      7.5.100
   libavfilter     9.12.100
   libswresample   4.12.100

Other Information

Linux version: NAME="Arch Linux
Kernel Version: Linux amd64-archlinux 6.9.3-arch1-1 #1 SMP PREEMPT_DYNAMIC Fri, 31 May 2024 15:14:45 +0000 x86_64 GNU/Linux
GPU Model:07:00.0 VGA compatible controller [0300]: Advanced Micro Devices, Inc. [AMD/ATI] Raven Ridge [Radeon Vega Series / Radeon Vega Mobile Series] [1002:15dd] (rev c6)
Mesa/GPU Driver Version: OpenGL version string: 4.6 (Compatibility Profile) Mesa 24.1.1-arch1.1
Window Manager and Version: xfce 4.18
Source mpv: arch-linux repository
Introduced in version: unknown

Reproduction Steps

I reencoded a video using ffmpeg and the gpu for encoding.

When I play the result with mpv, I see a colorful line at the bottom of the video. Playing the file with vlc or using avidemux, I cannot see this line.

Expected Behavior

Because this line isn't visible in the original video when playing it with mpv, I would expect it not to be there in the reencode (as it isn't seeable using vlc or avidemux playing the reencode).

The question is as first, if this is a mpv issue at all meaning: Maybe mpv shows a faulty file correctly whereas vlc and avidemux hide the faults of the video?

Actual Behavior

mpv --no-config test.mkv (+) Video --vid=1 () (hevc 1920x1080 23.976fps) (+) Audio --aid=1 --alang=eng () (eac3 6ch 48000Hz) AO: [pipewire] 48000Hz 5.1(side) 6ch floatp VO: [gpu] 1920x1088 yuv420p AV: 00:00:04 / 00:00:05 (98%) A-V: 0.000 ct: -0.051 Exiting... (End of file)

Log File

output.txt

Sample Files

test-file and screenshot.zip

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.

mpv-player / mpv