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A pre-alarm video buffering method and device

A video recording and pre-slow technology, applied in image communication, television, closed-circuit television systems, etc., can solve the problems of increasing system disk management consumption, and achieve the effects of improving experience, low performance consumption, and reducing complexity

Active Publication Date: 2019-04-30
ZHEJIANG UNIVIEW TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This increases the consumption of the system disk management

Method used

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  • A pre-alarm video buffering method and device

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Embodiment Construction

[0025] In order to solve the technical problems mentioned in the background technology, the present invention provides a pre-alarm video buffer solution. The cache space of the pre-alarm video in this scheme does not change the existing general storage block space layout, but at least a part of the space in the current storage block is allocated for the pre-alarm video cache, so that the disk management is simple. The index of the pre-alarm video buffer area is stored in chronological order. When an alarm occurs, only the index needs to be refreshed to the disk for storage. There is no need to write back the data, and the performance consumption is very low. At the same time, the consistency between the video data and the index area is guaranteed. Improved user experience during video playback.

[0026] Video storage in video surveillance includes plan storage and alarm storage. Planned storage is usually used to configure the time for video storage, and subsequent cameras wi...

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Abstract

The invention provides an alarm-ahead video caching method. The method comprises the following steps of: calculating a caching space size M required for an alarm-ahead video during executing alarm video storage according to a configured alarm-ahead caching time and a code rate; taking the storage space with the size of M or (M+N) belonging to a storage block of a camera as an alarm-ahead video caching space; and storing the alarm-ahead video in the caching space. With the scheme provided by the invention, data is unnecessarily written back during giving out an alarm, the performance consumption is low, and a user experience during replaying the video is improved.

Description

technical field [0001] The invention relates to the technical field of video monitoring and storage, in particular to a pre-alarm video buffering method and device. Background technique [0002] More and more applications only need to view the video for a period of time before and after the alarm, so that there is no need for round-the-clock video, which saves storage space. [0003] Existing pre-alarm recordings (hereinafter referred to as pre-alarm recordings) are stored through the pre-alarm recording buffering technology. The pre-alarm video buffer technology pre-allocates an independent storage block to a camera as the pre-alarm video buffer area, and then the camera buffers its own video in the pre-alarm video buffer area allocated to itself, that is, first in its own independent alarm The pre-alarm video is cached in the pre-buffer area. When an alarm occurs, the cached video will be written back to the current storage block, please refer to figure 1 . figure 1 Th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04N7/18H04N5/76
Inventor 荆向峰赵汉表严爱杰
Owner ZHEJIANG UNIVIEW TECH CO LTD