Video recording apparatus, video recording system and video recording method executed by video recording apparatus

摘要

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.

主权项

1. A video recording apparatus comprising:
a first thinning processor which reduces a data size of camera videos transmitted from a camera to a frame rate number smaller than 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 processor which has a frame rate number of a thinning process set in advance for each of a plurality of conditions, and which further reduces the data size of the videos stored in the ring buffer to the frame rate number in accordance with a condition among the plurality of conditions, the first thinning processor being configured to store the camera videos in the ring buffer at a frame rate number that is a lowest common multiple of a first frame number and a second frame number, wherein the first frame number is a frame number when the camera video is recorded in a normal condition and the second frame number is a frame number when the camera video is recorded in a case where an alarm signal is input to the video recording apparatus, wherein the second thinning processor reduces a data size of the data-size-reduced camera videos to the first frame number when the alarm signal is not input to the video recording apparatus, and wherein the second thinning processor reduces the data size of the data-size-reduced camera videos to the second frame number when the alarm signal is input to the video recording apparatus.