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File recovery method, system and DVR (Digital Video Recorder)

A file recovery and file technology, which is applied in the parts, electrical components, and color TV parts of the TV system, etc., can solve the problems of difficult to save files and so on.

Active Publication Date: 2013-01-09
HANGZHOU HIKVISION DIGITAL TECH
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Problems solved by technology

[0004] The purpose of the embodiment of the present application is to provide a file recovery method, system and DVR to solve the problem in the prior art that some files are difficult to save due to power failure and restart of the DVR

Method used

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  • File recovery method, system and DVR (Digital Video Recorder)
  • File recovery method, system and DVR (Digital Video Recorder)
  • File recovery method, system and DVR (Digital Video Recorder)

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no. 1 example

[0068] see figure 1 , is the flow chart of the first embodiment of the file recovery method of the present application:

[0069] Step 101: During the process of the DVR writing video data into the video buffer file, the index information of the video buffer file is updated according to a preset time interval.

[0070] In the embodiment of the present application, an index file for storing the index information of the recording buffer file may be pre-established in the hard disk of the DVR, and the index information is identified in the index file according to the file identifier of the corresponding recording buffer file. Before the DVR writes the recording data to the recording buffer file, apply for a recording buffer file for recording the recording data in the hard disk of the DVR, and save the initial index information of the recording buffer file in the index file, including the file identification of the recording buffer file, The file status, the offset of the recordi...

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Abstract

The embodiment of the invention discloses a file recovery method, a system and a DVR (Digital Video Recorder). The method comprises the following steps of: updating the index information of a video buffer file according to a preset time interval by the DVR in a process of writing video data in the video buffer file; acquiring the index information of the video buffer file when a writing period is not reached and the DVR is powered down and restarts; and writing the video data in the video buffer file into a CD through a CD writer according to video data offset indicated in the index information. The embodiment of the invention can acquire video data unwritten into the CD through the video data offset in the index information after the DVR is powered down and restarts so as to prevent video data unwritten into the CD for storage in the DVR from losing and ensure the integrity of a writing file. Without changing the hardware of a traditional DVR system, the embodiment of the invention can recover the video data without adding equipment cost after the DVR is powered down and starts.

Description

technical field [0001] The present application relates to the technical field of video surveillance, in particular to a file recovery method, system and DVR (Digital Video Recorder, digital hard disk video recorder). Background technique [0002] DVR is a monitoring device that can record video and audio data through a data hard disk. It has the functions of long-term video recording, audio recording, remote monitoring and control of images and voices. DVRs are divided into ordinary digital hard disk video recorders (only analog cameras can be connected), hybrid digital hard disk video recorders (HybridDVR) and network hard disk video recorders (NVR). DVR can be used in the interrogation process of the judiciary to record the interrogation process, generate corresponding video files, save the video files to the DVR hard disk, and then automatically transfer the video files in the DVR hard disk through the recorder at regular intervals Burn it to CD to save. [0003] The in...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04N5/77G11B27/10
Inventor 郭晓宇刘彦陈军科胡扬忠邬伟琪
Owner HANGZHOU HIKVISION DIGITAL TECH
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