Chainik wrote:

the problem is in specific video file
could you share it?

they are encoded anime files.
i can't upload them here and im not sure if i can share the links either.
if you wan't i can dm you the links

this error only happens when svp tries to inject into mpv when playing specific video files. those that say "unknown frame rate" in the error.
mpv can play those files just fine when svp code is disabled or svp is not running. svp can successfully inject into mpc-hc when playing those files with no errors. which makes me think this is a problem related to how svp interacts with mpv during certain playbacks.

https://prnt.sc/Rwt4i6LQjTsz
https://prnt.sc/1B5VI0TwQlwC

i detailed my issue on MPV github here https://github.com/mpv-player/mpv/issues/10360
they redirected me SVP support.