Libraries for Video Capture Device

I thought I had found a really good guide at

But it’s 11 years old and it seems all of the VideoCaptureDevice stuff was renamed or moved. I cannot find the functionality in current libraries.

// Enumerate available video capture devices
VideoInDevices = glXEnumerateVideoCaptureDevicesNV(dpy, screen, &numDevices);

Could somebody point me towards current functionality like this? Code examples?

I guess you don’t own one of those:
they have long been discontinued, only supported by older drivers.

Something like this:

Those are really custom design with their own fpga, needing custom drivers and libs/api from abaco, I guess.