Simple questions, complicated answers.
What is ONVIF? Literally – Open Network Video Interface Forum Conceptually it is a 'common calling protocol' for all devices that establishes conformance expectations for easy plug and play when a single interface has been implemented. ONVIF initially began as a video-only specification but has expanded into access control as well. The implementation of “profiles” allows common feature sets to be implemented as a baseline of conformance.
Why is it so difficult to implement, i.e. NOT plug and play as advertised?
Well that depends on your perspective. So, for clarity of focus, let’s consider bringing an ONVIF profile S conformant camera into an ONVIF profile S conformant VMS.
Arguably, the greatest difficulty is in the extensibility of the protocol. Every ‘call’ has multiple options that can be implemented, some required, some optional, but all can be implemented uniquely and still be fully ‘conformant’ to the standard. In fact, implementation doesn’t matter as long as the protocol for the caller is implemented based on the available specification. ONVIF is very flexible and covers the most common use cases at a high level. To establish conformance, the ONVIF organization created a test tool to validate the systems being built for both the video device (sender device) and the VMS (receiver client). Consider the tool to be like a test VMS. The tool, having been developed by ONVIF, covers every option and every variation to ensure a manufacturer has built a ‘conformant’ device or software platform. When a VMS manufacturer creates their ‘receiving’ software, they will have a few different cameras from one or more manufacturers in their lab. Many times this is project driven, so they may select cameras based on a specific business case. They will then verify that the combination of the VMS and the cameras present for the lab testing work properly. Rarely will a VMS manufacturer pull out the ONVIF specification and use it as the definition of their requirements and follow up by testing every camera defined as conformant. The intent of the specification is to minimize that need. So, when an integrator decides to utilize that same VMS for the next project and add in a camera that the VMS manufacturer did not test, it is possible that there is a shortfall in the VMS code as originally written.
But this problem is nothing new and is not isolated to ONVIF but common to any API specification. For example, several years ago Bosch implemented a new integration for Bosch IP cameras to a brand “x” NVR. Bosch was immediately blocked by an H.264 specification item that was implemented in the Bosch camera stream. However, the brand “x” renderer did not decode that specification item, even though it was defined by the standard. It was nearly a year before the mismatch was fixed. These types of issues will constantly creep up to any client manufacturer that does project driven work versus strategic implementation work. Standards are only as good as those who completely implement them (which from a resource standpoint is not viable so it never happens). Partial implementation is the killer.
Another 'gotcha' is event (alarm) management as shown to the left, offered by Bosch's Intelligent Video Analysis (IVA). ONVIF addresses the event MECHANISM, not the actual events (save a couple). So while any client manufacturer can retrieve the events in a common fashion, the events themselves are unique which causes the creation of a custom development cycle for the client manufacturer for every type of device integrated. This is why some VMS providers are ONVIF profile S conformant but only support events from specific vendors.
How does Bosch try to simplify integration between Bosch IP cameras and 3rd party VMS manufacturers? Bosch invested in a global initiative several years ago to eastablish global and regional teams of engineers dedicated to working with 3rd party VMS manufacturers to implement integrations to Bosch devices.
[VIDEO] Integration Partner Program Overview
ONVIF Releases Profile C for Physical Access Control
SAN RAMON, CALIFORNIA. – March 4, 2014. ONVIF, the leading global standardization initiative for IP-based physical security products, announced the final release of Profile C, which brings the functionality of the ONVIF global interface specification into the physical access control arena. Through Profile C, systems integrators, specifiers and consultants are able to achieve interoperability between clients and devices of physical access control systems (PACS) and network-based video systems. With this final release, including the availability of the Profile C Test Tool, manufacturers are now able to introduce Profile C conformant products to the market.
With Profile C, compatibility between access control edge devices and clients is improved, installation simplified and training time diminished because of the reduced need for multiple proprietary monitoring systems to handle different PACS devices. Profile C conformant devices within the access control system provide door and access point information and functionality related to basic door control activities such as locking and unlocking doors, when a door has been accessed and other door monitoring tasks.
“Extending the ONVIF interface into other areas of physical security emphasizes ONVIF’s recognition that systems designers need a consistent interface to enable seamless integration within their security systems,” said Per Björkdahl, Chairman of ONVIF’s Steering Committee. “With the release of Profile C for access control, integrators and specifiers can be confident that products bearing the Profile C mark will work together, ultimately enabling a better physical access control solution or integrated access and video system for their clients.”
Profile C can also be combined with ONVIF Profile S for video and audio streaming so users can group related access and video devices, sharing the same device management features such as network configuration and system settings.
ONVIF introduced the profile concept to enable end users to more easily identify features supported by a profile without determining the compatibility between versions of the ONVIF specifications. In addition to Profile C for PACS, ONVIF offers Profile S as the interface to stream video and audio between conformant devices and clients, and Release Candidate Profile G, which will encompass video storage, searching, retrieval and playback.
There are approximately 2,500 products conforming to Profile S in the market from nearly 500 ONVIF member companies.
Further information about ONVIF conformant products, including the vendors and the conformant models, is available on ONVIF’s website: www.onvif.org.