Question / Help Why is the game capture feature so much easier?

[Zone Dymo]

This is a question purely out of interest:

Why is the in-program game capture feature so much easier on the system, so much more lightweight
Then capture from a capture card?

 

[dodgepong]

It's not significantly easier, but it is easier. Game capture accesses the game's frames directly from the GPU's VRAM, which doesn't require any CPU. Capture cards, on the other hand, are DirectShow devices, which takes CPU to get the images from.

There shouldn't be that much of a difference in performance between the two, though.