`format` filter will crop the output

mpv Information

mpv v0.40.0-119-g1d1535ff9 Copyright © 2000-2025 mpv/MPlayer/mplayer2 projects
 built on May 23 2025 00:13:48
libplacebo version: v7.351.0 (v7.351.0-dirty)
FFmpeg version: N-119686-gae0f71a38
FFmpeg library versions:
   libavcodec      62.3.101
   libavdevice     62.0.100
   libavfilter     11.0.100
   libavformat     62.0.102
   libavutil       60.3.100
   libswresample   6.0.100
   libswscale      9.0.100

Other Information

- Windows version: win11 23h2
- GPU model, driver and version:RTX4080
- Source of mpv: see above
- Latest known working version:--
- Issue started after the following happened:--

I doubt it was caused by the buggy `--video-crop` implement...

Reproduction Steps

open a src video (1920x1080)
vf set format=w=2560:h=1440:convert=yes

Expected Behavior

No cropping.

Actual Behavior

Output would be cropped.

Log File

crop.log

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.

Reproduce the issue with the vf set format=w=2560:h=1440:convert=yes entry point using a 1920x1080 source, then inspect crop.log alongside the expected and actual screenshots. Done means the format filter produces the requested 2560x1440 output without cropping.