> Found it. Native VMR9 disconnects and reconnects the pin when changing d3d device. Unfortunately, neither party remembers the media type, so they can't reconnect.
>
> Fixed. Took approximately seven forevers to figure out @\_@
Ah, that makes sense, thanks. That's done in some other filters as well.
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https://gitlab.winehq.org/wine/wine/-/merge_requests/3970#note_48874