Desired features: IP-based video cameras clear audio capture night-vision capable motion-detection tagging of video rugged IP 66 (Ingress Protection class 66) high-resolution feeds on primary gateways and major thoroughfares community-submitted video feeds organized from distributed feeds into web-accesible neighborhood watch system video accessible from smart phones video feeds archived to one or more video servers frame rate needs to be 15 fps or greater to be evidence-ready high-resolution feeds automatically degraded over time so that space does not run out and newest video is evidence-ready video submitted via local wifi network where available; submitted via resident's internet where neighborhood wifi is not available Issues: quality of service (QoS) issues may be a concern with many cameras storing data to bottlenecked server space where video is archived network traffic from cameras may saturate available bandwidth with streamed video and may impair normal Internet traffic storage may be significant and will require archival policies and means of tagging important feeds before they are expunged storage costs per camera can be from $50 to $500 depending on resolution and frame rate vandalism of cameras quality of devices need to be weather-resistant equipment will need to be regularly serviced, replaced legal / privacy concerns video quality needs to be sufficient for use in court to identify license plates and physical features audio capture may also be very important for capturing evidence, but adds to the technical difficulty and storage Resolution 4CIF (640x480 = 0.25 MP; SD) is considered good enough for basic surveillance and fits the standard definition format (SD) 720P (1280x720 = 1 MP; HD) is good choice for detail surveillance; fits high-def format (HD) 1080P (..x1080 = 2 MP) is best for detail surveillance without increasing costs to level of 5 MP cameras 1280P? (5 MP) is needed to capture license plate details when lighting is at least close to ideal and within 40 feet of camera An optimal system (regarding storage and network capacity) may involve a mix of 720P/MP and 4CIF cameras. But, if capacity allows for it, using HD cameras provides a more uniform (ideal) surveillance experience. Camera Types Dome cameras - more attractive form factor. typically more expensive than box cameras. increases deterrent effect since camera target is not clear to outside observers. Cube Cameras Box Cameras Bullet Cameras PTZ Cameras - best for live surveillance situations; useful in combination with motion detection or analytic alerts; real-time monitoring; most beneficial when monitoring a large surface area; may require additional joystick / controller to be useful; more expensive than a high MP camera; more limited view than a wide-area high MP record References http://ipvideomarket.info/report/training_resolution_of_ip_cameras http://ipvideomarket.info/report/training_frame_rates_for_ip_cameras http://ipvideomarket.info/report/training_bandwidth_basics_for_video_surveillance http://ipvideomarket.info/report/training_video_management_system_vms_fundamentals http://ipvideomarket.info/report/network_fundamental_for_video_surveillance |