Can fbdevsink output to Xvfb virtual framebuffer? Which device to use?

[HermannSW]

I learned yesterday how to use Xvfb virtual Linux framebuffer:
https://www.raspberrypi.org/forums/viewtopic.php?f=66&t=261264

I want gstreamer fbdevsink output into a virtual framebuffer.
But virtual framebuffers do not have /dev/fbX links.

So is output of fbdevsink to virtual framebuffer possible?
If so, how?

I use fbdevsink for high performant output of high framerate video.
I was able to output videotestsrc at 960fps on Raspberry Pi display with
fbdevsink!
https://lb.raspberrypi.org/forums/viewtopic.php?t=197124#p1510434



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