Abstract: The present invention enables an effective use of a ring buffer. A video recording apparatus includes a first thinning process unit which reduces a data size of camera videos transmitted from a camera to a frame rate number of the camera videos, and which stores the camera videos having undergone a thinning process in a ring buffer, and a second thinning process unit which further reduces the data size of the videos stored in the ring buffer at a frame rate number in accordance with a condition among a plurality of conditions. The first thinning process unit stores the camera videos in the ring buffer at a frame rate that is the lowest common multiple of the frame rate numbers of the plurality of conditions.

Abstract: The present invention enables an effective use of a ring buffer. A video recording apparatus includes a first thinning process unit which reduces a data size of camera videos transmitted from a camera to a frame rate number of the camera videos, and which stores the camera videos having undergone a thinning process in a ring buffer, and a second thinning process unit which further reduces the data size of the videos stored in the ring buffer at a frame rate number in accordance with a condition among a plurality of conditions. The first thinning process unit stores the camera videos in the ring buffer at a frame rate that is the lowest common multiple of the frame rate numbers of the plurality of conditions.

Abstract: In order to provide a monitoring system for performing monitoring efficiently using a small number of cameras in accordance with a crowded degree in a target region, a monitoring system, comprising: a movable monitoring camera; and a controlling unit for controlling the monitoring camera, wherein the controlling unit detects a target object in a target region, calculates a crowded degree of the target objects in the target region, moves the monitoring camera to a position of the target object so as to monitor the target object if the crowded degree is small, and makes the monitoring camera round so as to monitor the target objects if the crowded degree is large is provided.