Download and evaluate the free version of vMix https://www.vmix.com. vMix has a Powerpoint input which will require that you obtain a copy of the Powerpoint prior to the presenter speaking. The free version permits two inputs – an HDMI input using a capture card such as El Gato 60S or something similar, and the second input can be any one of several options, including a Powerpoint file.
The free vMix will accommodate a recording of the presentation but if memory serves, it will not allow an HD recording. For that you will need to purchase a license for $60.
