This time I pasted all of the pieces into a single shell script (instead of running it piecemeal) and things went smoothly. Still took a while, even on the Core-i5 system with an SSD and 32 GB of physical memory. I specifically pulled 4.0.1 from git rather than the default choice from the source of the instructions that built ‘master’.
Tonight I’ll have to write a bit of code to use the library and see if I can get streams of images programmatically from one or more of the webcams I’m working with.
At some point I may bump up the swap space on another of my RPi systems to see if the same script works there as well.