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Method for rapidly positioning videos by time, video storage control device and positioning device

A technology of storage control and video recording, which is applied in the direction of image communication, color TV parts, TV system parts, etc., can solve the problems of long search time for I frames, slow recording speed according to time positioning, etc., and achieve the goal of increasing speed Effect

Active Publication Date: 2012-01-18
HANGZHOU HIKVISION DIGITAL TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When the video is relatively large, the time to search for the I frame will be longer, resulting in a slower speed of locating the video by time

Method used

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  • Method for rapidly positioning videos by time, video storage control device and positioning device
  • Method for rapidly positioning videos by time, video storage control device and positioning device
  • Method for rapidly positioning videos by time, video storage control device and positioning device

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Embodiment Construction

[0042]In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be described in detail below through specific embodiments and with reference to the accompanying drawings.

[0043] Compared with the prior art, the present invention not only records the start time and end time of the video recording in the video record in the index file when writing the video data, but also records the video recording start offset, video size, and I frame information start offset. Shift, I frame information size;

[0044] At the same time, the pre-allocated video storage space not only writes the frame data of the video, but also writes the I frame information of the video. The I frame information includes the I frame file offset and the I frame time point;

[0045] Therefore, when locating the video by time, the I frame information recorded in the video recording in the index file can be used to offset and read the corresponding ...

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PUM

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Abstract

The invention discloses a method for rapidly positioning videos by time, which is characterized by comprising the following steps of: when recording a video, distributing a video storage space and video records in an index; recording a name of the video storage space, a video start time, a video start offset and a start offset of I frame information into the video records; writing frame data into the video storage space from a position of the start offset of the video in sequence; if the frame is an I frame, writing the I frame information from a position of the start offset of the I frame information in an inverted order; after writing the data, recording a finishing time of the video, a size of the video and a size of the I frame information into the video records; when the videos are positioned, finding out the video records containing time points from the index according to the time points of the videos to be positioned, thereby obtaining the name of the video storage space and the start offset of the I frame information; when reading the position of the start offset of the I frame information in the video storage space, reading the I frame information in an inverted order, matching the I frame information with the time points, and positioning the information to a video position offset in an I frame file in the I frame information. The invention also discloses a device for rapidly positioning the videos by time. According to the method and the device provided by the invention, a speed for positioning the videos by time can be accelerated.

Description

technical field [0001] The invention relates to data storage technology, in particular to a method for quickly locating a video according to time, a video storage control device and a positioning device. Background technique [0002] The purpose of video recording is to view and analyze the video after the event. One of the very important requirements is to locate the time point you want to view by time. Currently, before recording, you must first reserve storage space for the video and create an index file. [0003] Reserving storage space for recording refers to pre-allocating part of the disk space for storing video data according to the actual needs of users, which can effectively prevent problems caused by insufficient disk space. The stored video data includes a video and an index file, wherein each video record in the index file corresponds to each video one by one. Index files generally occupy very little space, and a capacity value can be estimated according to the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N5/93G06F17/30
Inventor 潘亚东张小媛曹峰金祥庆刘彦陈军科
Owner HANGZHOU HIKVISION DIGITAL TECH
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