how to print video FPS cmd/txt without playback

[geextahslex]

Hi, I need to get the video FPS information without starting video playback and put it into a txt file
mpv --vo=null --no-video --msg-level=cplayer=info test.mkv > fps.txt
this sometimes starts playing the video (not visually) but I need only the FPS value.

Here you can see, it gave me the information but started also the video.
fps.txt

Thanks for any help :)

[geextahslex]

mpv --vo=null --no-video --no-audio --msg-level=cplayer=info test.mkv > fps.txt