This paper investigates and analyzes the characteristics of video data and puts forward a campus surveillance video storage system\nwith the university campus as the specific application environment. Aiming at the challenge that the content-based video retrieval\nresponse time is too long, the key-frame index subsystem is designed. The key frame of the video can reflect the main content of\nthe video. Extracted from the video, key frames are associated with the metadata information to establish the storage index. The\nkey-frame index is used in lookup operations while querying. This method can greatly reduce the amount of video data reading\nand effectively improves the query�s efficiency. From the above, we model the storage system by a stochastic Petri net (SPN) and\nverify the promotion of query performance by quantitative analysis.
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