[WLUG] Does Poxmox Virtualize H.264 encoding

I occasionally use OBS studio as a screen recorder in my main OS and my CPU is a little light for CPU encoding of video.  I have been considering using Proxmox as my hypervisor in place of Virtualbox on my single desktop. Does anyone have any idea if proxmox provides virtual H.264 hardware encoder support like there is a virtual device for keyboard and mouse?  From what I have been able to determine,  I can not use a pass-through unless I get a second  video card, and I suspect there will be other limitations.  Right now, I can not get another video card due to a shortage of PCIe slots, $$ and power supply capacity .