Edge recording for video surveillance has over the years gained relevance in both residential and commercial security applications. This concept is likely to become the preferred mode of video storage, especially for small surveillance applications of up to 16 cameras.
Increased capacity/Reduced Cost
One of the reasons for the popularity of on-board video storage is the technological advancement that has seen the rapid increase in SD card storage capacity in recent years, coupled with a substantial reduction in the cost of the SD cards.
Flexibility: Primary vs. Backup Storage
On-board storage is quite flexible in that, it can be used as the primary storage or backup storage, depending on the individual needs of a customer, as well as the type of surveillance application being deployed. On one hand, Edge recording provides a cost-effective solution when used as primary storage for small-to-medium business surveillance installations, of not more than 16 cameras.
On the other hand, on-board storage plays a crucial role as secondary or backup storage for large enterprise security applications, with camera installations ranging from 16 to hundreds. In such cases, the SD cards are only used for recording when there is downtime in the surveillance network.
SD Card Failure
The weakest link in edge recording for video surveillance has to do with the lifetime of the SD cards. It is inevitable for all SD cards to fail at some point. The frequent read/write cycle causes significant wear and tear on the SD cards, and eventually leads to failure. The use of event-based recording instead of continuous recording is one of the measures that can be used to increase the lifetime of SD cards.
Quality vs. Price
The type and class of an of SD card usually determines the quality of storage and ultimately the price. Many users usually go for the inexpensive SD cards, without giving a second thought on the level of performance and life. As a result, they end up paying more.
Vulnerability to External Influences
A variety of factors such as the location of the card slot on the camera, temperature and the environment influence the life and performance of SD cards.