【摘要】：針對(duì)文件系統(tǒng)存儲(chǔ)視頻數(shù)據(jù)時(shí)存儲(chǔ)效率低和檢索性能差的問題,提出一種基于裸盤設(shè)備的視頻數(shù)據(jù)專用存儲(chǔ)方案,實(shí)現(xiàn)了視頻數(shù)據(jù)的高效存儲(chǔ)和秒級(jí)檢索。針對(duì)多路視頻流的并發(fā)寫入控制,采用單線程非阻塞I/O復(fù)用技術(shù)和"乒乓緩沖"機(jī)制,避免多路視頻流并發(fā)寫入時(shí)的阻塞問題;針對(duì)視頻監(jiān)控系統(tǒng)媒體轉(zhuǎn)發(fā)服務(wù)器的時(shí)鐘漂移問題,采用基于兩級(jí)索引的回饋定位技術(shù),提高系統(tǒng)對(duì)服務(wù)器鐘差的容錯(cuò)能力。系統(tǒng)測(cè)試結(jié)果表明,相對(duì)于文件存儲(chǔ),"時(shí)間索引+數(shù)據(jù)塊"存儲(chǔ)方式的視頻檢索效率不受數(shù)據(jù)規(guī)模大小影響,多路并發(fā)寫入時(shí),單線程非阻塞I/O復(fù)用和"乒乓緩沖"機(jī)制能有效避免阻塞現(xiàn)象的發(fā)生。
[Abstract]:Aiming at the problems of low storage efficiency and poor retrieval performance when video data is stored in file system, a special storage scheme for video data based on bare disk device is proposed, which realizes efficient storage and second-level retrieval of video data. The mechanism avoids the blocking problem when multi-channel video stream is written concurrently. Aiming at the clock drift problem of media forwarding server in video surveillance system, the feedback location technology based on two-level index is adopted to improve the fault tolerance of the system to server clock error. The efficiency of video retrieval is not affected by the size of data. Single thread non-blocking I/O multiplexing and "ping-pong buffering" mechanism can effectively avoid blocking when writing in parallel.
【作者單位】： 中國(guó)航天科工集團(tuán)第二研究院七0六所;
【分類號(hào)】：TP333
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本文編號(hào)：2244619