I had only the former installed, but when I tried to install OBS, it had the latter as an optional package for “hardware encoding”. So, I installed that too, but I am not sure what the difference between the two is.
Do I need both?
Also, even with the latter, in the initial settings wizard, it detected H.264 software encoding for 840x something (the monitor is 1080p), when this page seems to say that the HD 620 is capable of hardware encoding up to 4K H264/265. Why is that?