Vehicle-mounted video recorder video coverage method based on virtual timestamp chain
A technology of time stamping and video recorder, applied in data recording, recording signal processing, recording information storage, etc., can solve the problems of time stamp disorder of video files, wrong coverage of important evidence video, and continuous destruction of video coverage, so as to avoid time Poke disorder effect
Active Publication Date: 2021-09-17
广州敏视数码科技有限公司
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Problems solved by technology
The traditional management methods for video storage are all based on the time dimension, and the overwriting strategy is to overwrite according to the size of the time, that is, overwrite the oldest video file in the disk and write the new video file
In this way, if the RTC of the system is abnormal or the system time is deliberately tampered with, the time stamp of the video file in the disk will be disordered, so that the newly written video file will be overwritten as the oldest video by mistake, and the continuity of the video coverage will be affected. It will cause great damage, and may also cause problems such as important evidence videos being mistakenly overwritten
Method used
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Embodiment Construction
[0013] Such as figure 1 As shown, a video overlay method for a vehicle-mounted video recorder based on a virtual time stamp chain, including:
[0014] Create a virtual timestamp list for recording the timestamp information of video files in the disk directory;
[0015] When the recording device recovers abnormally, compare the maximum timestamp of the virtual timestamp list with the current system time;
[0016] If the maximum timestamp of the virtual timestamp linked list is greater than the current system time, then the maximum timestamp of the virtual timestamp linked list plus the preset time value is used as the initial timestamp of the new video file timestamp information;
[0017] When the disk video file storage is full, the old video files are overwritten according to the time stamp time sequence of the virtual time stamp linked list.
[0018] Create an actual time stamp linked list for recording the time stamp information of video files in the disk directory. When...
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The invention discloses a vehicle-mounted video recorder video coverage method based on a virtual timestamp chain, and the method comprises the steps: creating a virtual timestamp chain table for recording the timestamp information of a video file in a disk directory, and comparing the maximum timestamp of the virtual timestamp chain table with the current system time when a video device recovers abnormally; if the maximum timestamp of the virtual timestamp chain table is greater than the current system time, adding a preset time value to the maximum timestamp of the virtual timestamp chain table to serve as a starting timestamp of the timestamp information of the new video file; and when the storage of the disk video file is full, covering the old video file according to the timestamp time sequence of the virtual timestamp chain table. According to the vehicle-mounted video recorder video coverage method based on the virtual timestamp chain, the problem that the newly written video file is covered as the oldest video by mistake due to disorder timestamp of the video file in a disk caused by abnormal RTC of the system or intentional tampering of the system time can be effectively avoided.
Description
technical field [0001] The invention relates to the technical field of video recording of a vehicle-mounted video recorder with flash electronic external storage of a data processing system, in particular to a video overlay method of a vehicle-mounted video recorder based on a virtual time stamp chain. Background technique [0002] In the field of vehicle surveillance, vehicle video is usually required, and the capacity of the disk used to store video is limited. When the disk is full, video overwriting is required, that is, the older (time dimension) video files in the disk are deleted and written to New video files to ensure the continuity of the video. The traditional management methods for video storage are based on the time dimension, and the overwriting strategy is also overwriting according to the size of the time, that is, overwriting the oldest video file in the disk and writing a new video file. In this way, if the RTC of the system is abnormal or the system time ...
Claims
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Login to View More IPC IPC(8): G11B20/10
CPCG11B20/10527G11B2020/10537
Inventor 张永前张建强石锡敏
Owner 广州敏视数码科技有限公司