Four key points to reduce storage space for video surveillance

When we perform video surveillance, how can storage space be better reduced? Today, the author introduces four methods for everyone to choose.

First: According to the current mainstream compression method, the required space for surveillance video storage is as follows: H.264 compression mode: HAFLD1 resolution, real-time 25 frames, 300M/hour/road; H.264 compression mode: CIF resolution, Real-time 25 frames, 200M / hour / way; if our existing video is not as important as the new video, you can reduce the recording frame rate of the old video. This can greatly reduce the need for storage space in old videos.

Second: In some cases, the video quality provided by H.264 compression is only better than the video quality provided by MJPEG compression on the boundary, but because of the lower bandwidth occupied by H.264 compression. Therefore, recording video data takes up less storage space. Overall, in most monitoring systems, H.264 is a more efficient way to encode and decode from the perspective of reducing bandwidth and storage space. Beijing Jinganbao Monitoring Company--Technology Department

Third: We can consider adding a basic motion analysis software package to the monitoring system, and do not need to record the video for certain moving objects. For example, when a car drives down a road, we don't need to record the car's whereabouts. When the bush is swaying in the wind, it doesn't need to be recorded; if this happens, it's recorded, like monitoring the perimeter. It is necessary to keep recording, so the storage space consumed can be imagined.

Fourth: In many public places (such as schools, factories, and other places), there are very few people appearing at night, but the camera is working as usual, so the recorded video has no effect at all, and it also occupies storage space. Therefore, we can consider reducing the recording rate during the period of less moving targets by controlling the recording rate. For example, 15 frames per second may occupy a large storage space, which can be 2 to 3 frames per second, or even 1 frame. Rate recording. End users can save up to 80% on record space. However, although there are fewer pedestrians in the building at night, many conference rooms are not used for most of the time. If these occasions have been recording video at a low rate, what should happen if there is an alarm? We can consider adding the basic intelligent motion analysis function to the monitoring system. If there is a moving target, the recording frame rate will return to the normal rate; when the moving target disappears, the recording rate will return to 2 to 3 frames per second. As a result, both the storage space is reduced and the alarm can be monitored.