Video storage method and device, video reading method and device and video access system

Abstract

The invention discloses a video storage method and device, a video reading method and device and a video access system. The video storage method comprises following steps of collecting a video and generating cache region data, wherein the cache region data starts from an I frame or R frame of the video; storing the cache region data in the storage fragment of a storage region; and inserting the I frame having reference relationship with the first frame into a newly established storage fragment if the storage fragment is the newly established storage fragment and the first frame of the data of the cache region data needing to be stored in the storage fragment is the R frame. According to the scheme, in the storage process of the video data, the code stream of the video is prevented from being lost, and the code stream structure of GOP (Group of Pictures) codes is prevented from being changed. According to the video data stored by the method, cross storage fragment reference is avoided when the video is read, and rapid decoding is realized when random access is carried out.

Description

technical field [0001] The invention relates to the technical field of video monitoring, in particular to a video storage method and device, a reading method and device, and an access system. Background technique [0002] At present, video surveillance is almost everywhere in modern life, serving people's residential safety, traffic safety, health safety, social safety and production safety. A large number of surveillance videos are used to save storage costs or meet the needs of low bit rate transmission. , all hope that the encoder can further reduce the bit rate on the premise of ensuring video quality. [0003] For traditional encoders, coding frames are generally divided into three types: I frame, P frame, and B frame. The reference relationship of these three frames is as follows figure 1 shown. Among them, the I frame is an internal coding frame, and there is no dependency relationship with other frames. It does not need to refer to other frames, and only needs to b...

AI Technical Summary

Problems solved by technology

Also, not every encoder supports the ability to force-encode I-frames

Obviously, the current video surveillance data storage method is only suitable for occasions where the GOP length is short, but it cannot well meet the video surveillance data storage requirements when the GOP length is long

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