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Multi-channel video data reading and writing method

A data reading and writing, multi-channel video technology, applied in the video field, can solve the problems affecting the disk reading and writing efficiency, achieve the effect of improving the reading and writing efficiency, reducing the jump frequency, and ensuring the use efficiency

Inactive Publication Date: 2015-04-29
XIAN QUNFENG ELECTRONICS INFORMATION TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this way, when writing multiple channels of video data, each channel of video corresponds to a video file. When writing, the head of the disk will need to continuously jump to different video file disk storage locations for writing operations, thus affecting the overall disk. Read and write efficiency

Method used

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  • Multi-channel video data reading and writing method

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Embodiment Construction

[0024] The technical solutions of the present invention will be further described below in conjunction with the accompanying drawings and through specific implementation methods.

[0025] figure 1 It is a flow chart of multi-channel video data reading and writing in the specific implementation manner of the present invention. Such as figure 1 As shown, the multi-channel video data read and write process includes the following steps:

[0026] Step 101. Acquire multiple channels of video data from multiple cameras.

[0027] Step 102, the video frame data of the video data of all the cameras is written in a video file in the memory in a combined write mode, a section of video frame data of a camera is a data block, and the video data of each camera generates a video head respectively document.

[0028] In this process, the video frame data of all the video data of the camera is written into the cache in the form of data blocks, and after the cache is full, it is written into ...

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PUM

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Abstract

The invention discloses a multi-channel video data reading and writing method. The multi-channel video data reading and writing method comprises the steps of obtaining video data from multiple cameras, writing video frame data of the video data of all the cameras into one video file of a memory in a write combining way, establishing a data block indexing file and a camera video indexing file in the video file, finding the positions of all data blocks of one assigned camera in the data block indexing file within a search time through the camera video indexing file, obtaining indexing records of all the data blocks of the assigned camera within the search time from the data block indexing file, obtaining all the data blocks of the assigned camera within the search time from the video file, and merging according to the start time and the end time. By adopting the technical scheme, the jumping frequency of a magnetic-disc head can be reduced to a large extent, and the whole reading-writing efficiency of a magnetic disc is increased.

Description

technical field [0001] The invention relates to the field of video technology, in particular to a method for reading and writing multi-channel video data. Background technique [0002] Writing multiple channels of video data on the same disk usually uses multiple video files for each channel to write independently. In this way, when writing multiple channels of video data, each channel of video corresponds to a video file. When writing, the head of the disk will need to continuously jump to different video file disk storage locations for writing operations, thus affecting the overall disk. Read and write efficiency. Contents of the invention [0003] The purpose of the present invention is to propose a method for reading and writing multi-channel video data, which can greatly reduce the jumping frequency of the disk head and improve the overall read and write efficiency of the disk. [0004] For reaching this purpose, the present invention adopts following technical sche...

Claims

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Application Information

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IPC IPC(8): G06F17/30
CPCG06F16/70
Inventor 不公告发明人
Owner XIAN QUNFENG ELECTRONICS INFORMATION TECH
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