Index establishing method for audio/video data

Abstract

The invention discloses an index establishing method for audio / video data. The method comprises the following steps that a disc space is divided into an index area and a data area, the index area is used for storing record section information and a disc area index, the data area is divided into a plurality of data areas, serial numbers are distributed for the data areas, and then the recovery process of the disc space and establishment of an index are performed. The index establishing method for audio / video data has the advantages that an index layer is simple, an index operation is atom operation, space recovery is simple, and space debris does not exist. During abnormal outage, saved data cannot be lost, simultaneously, the data operation has strong locality, data reading efficiency is improved, service life of a disc is prolonged, and the method in the index establishing method for audio / video data has high reliability, stability and performance.

Description

technical field [0001] The invention relates to the technical field of video monitoring and data storage, in particular to a method for establishing an index of audio and video data. Background technique [0002] In order to save audio and video recordings, the video surveillance system, like a PC, also has a hard disk file system. The hard disk file system of the video surveillance system can be divided into two categories, one is the same general file system as the PC, and the second is a special file system specially developed for special storage purposes. [0003] In a video surveillance system, audio and video data are stored in the form of video segments. During audio and video recording, video segments of different sizes are generated according to the length of the recording time. For example, when recording according to the arming plan (the arming time can range from a few minutes to a few days, or around the clock), a video segment with a large amount of data (sev...

AI Technical Summary

Problems solved by technology

In addition, mixing large files and small files will generate a lot of fragmented space during the space process, which will affect the efficiency of disk usage and even reduce system performance in severe cases.

Sudden power failure during the file writing process, the file system is easily in an inconsistent state, resulting in the file cannot be opened, or even the entire file may not be used normally, resulting in the loss of all saved video segments

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