vflip not working

[neosettler]

Greetings,

With VLC SDK 3.0, I'm using arguments:

"--transform-type=vflip",
"--video-filter=transform",

And gives error:
transform filter error: Unsupported pixel size 0 (chroma DX11)
main filter error: option chain-level does not exist
…

The video render a black screen. I'm positive this option used to work in the past. Any idea what might be the problem?

Is there any known "efficient" alternative to yflip the video output? ideally, an alternative that would also yflip subtitles as well.

Thank you,