I use Blue Iris, the Blue Iris plug-in, the DVR plug-in, and the Virtual Motion Sensor plug-in. Vera can arm the cameras, and the cameras trip motion in Vera. Most of this is documented in a couple of threads. Took me months of reading, playing, and dinking around to get it to work.
Vera 3, UI7 1.7.919, CT101 t-stat, Everspring motion detector, GE/Jasco switch, Leviton outlet, AeonLabs door sensor, Insteon garage control, Blue Iris, Sricam SP011, iPhone locator, APCUPSD, VeraMate, VeraAlerts, PLEG, House Modes, Countdown Timer, DVR, Virtual & Multi Switch, Weather, Sys. Mon.