Video data access method

Abstract

The invention relates to a video data access method. According to the invention, a secondary index mechanism is introduced and pre-distribution space is used; and video data access is carried out by means of data block storage. Therefore, the document retrieval efficiency is improved; and the linear decline of the performance can be prevented with increasing of the capacity. Moreover, the characteristics of the video data continuity is fully considered; with the pre-distribution space, continuous reading and writing are carried out based on data blocks, thereby improving the reading-writing performance and realizing high-performance access of video data under the high-capacity storage equipment.

Description

technical field [0001] The invention relates to the technical field of video monitoring, in particular to a method for accessing video data. Background technique [0002] With the continuous development of information technology, video surveillance, as an important means in the field of security, plays an increasingly important role and has developed rapidly in recent years. As video recording is important data in the surveillance industry, various industries have put forward higher requirements for its storage read and write access. In order to meet the storage needs of users, large-capacity storage devices have emerged as the times require. In order to adapt to video data access in large-capacity storage devices, the industry generally adopts a storage method based on a file system. By storing video files according to time periods, the storage server’s own read and write functions are used to realize file retrieval and read and write, and finally realize video data storag...

AI Technical Summary

Problems solved by technology

However, this mechanism has the following problems: First, the efficiency of file retrieval and reading and writing completely depends on the processing mechanism of the storage server itself. As the capacity increases, the corresponding efficiency will decrease linearly; second, the characteristics of video streams are not considered. , such as the video stream has the characteristics of continuity, periodicity, and large capacity, and the frequent operations on the file are likely to cause fragmentation; finally, in the file retrieval and reading and writing, the continuous characteristics of the video stream are not fully utilized, and special Optimization, used to improve the efficiency of retrieval and reading and writing

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