Dahua NVR 4208-8P Email Snapshots - Change Quantity and Time

I have 4 Dahua cams hooked up to a POE NVR, the Dahua 4208-8P. I have setup IVS on the cameras and NVR with the latest firmware, and get emails when the IVS is triggered. I have also figured out how to kick out the emails with start and stop (ie without and attachement) using GMAIL.

My question is, the snapshots in the emails I receive seem to be a certain duration after the motion has been detected. Ideally, i would like to receive multiple snapshot emails, but my main goal is to recieve a snapshot as soon as the IVS is tripped. More often than not, an object triggering the IVS will be gone in the snapshot, as it has passed and left the zone in question. Is there a way to change this that anyone has figured out?

Thanks

Anyone have any ideas? Still cannot get this to function properly.