Marty, my suggestion was to record during non-motion and motion, i.e. continuously, just at different frame rates. I thought it was obvious that when I said set the frame rate to 1 FPS during non-motion I meant record 1 FPS. That's why I said the trade-off is you would need more storage.
Take a look again at what I said but let me first insert one new sentence in bold
Change image storage setting to Record Always. Assuming server side VMD, ONSSI also allows you to specify a frame rate during non-motion that you can set low, like 1 FPS, and then speed up on motion to 15 FPS. Then you don't get stuck wishing you could go back earlier, though at the cost of some added disk space.
Are you O.K. with it now?
I would think its totally clear now to you, except for the fact that there is clear and beneficial mingling going on, VMD and Speedup, which you are insisting cannot be.
Do you think that VMD means "record only on motion?". I don't. IMHO, it means detect motion, and then once detected, presumably one would take some action, change frame rate, send alarm i/o, start recording...
VMD is the analytic, Speedup is the action.