I just installed a Hikvision DS-2CD2032F and configured it to send an e-mail notification and record a video clip to my NAS whenever there is motion detection in the specified red rectangle. That all seems to work OK (still need to fine tune the sensitivity). But when I enable the "Line Crossing Detection" and check the exact same boxes, I only get the e-mails - no recorded video clips. Does anyone know if this is a limitation of this feature or do I have something misconfigured?