Rapid response video monitoring method and system based on Linux system

Abstract

The invention provides a rapid response video monitoring method based on a Linux system. The method comprises that a video monitoring Camcap module is set in the Linux system; the video monitoring Camcap module reads video monitoring data from an kernel driver V4L2 through ioctl system invoking and transmits the data to a kernel FB (frame buffer) for operation through ioctl system invoking; the video monitoring Camcap module obtains video data through Linux system invoking of the kernel driver V4L2 and transits the video data to a screen for display through Linux system invoking of the kernel FB, thus finishing the rapid response of the Linux system. The invention also provides a video monitoring method based on the rapid response of the Linux system. According to the method and the system provided by the invention, the original boot sequence of the system is not influenced; special modifications aiming at different sensors are unnecessary; and the rapid response is carried out to the video monitoring.

Description

technical field [0001] The invention relates to the technical field of video monitoring, in particular to a Linux system-based quick-response video monitoring method and system. Background technique [0002] The startup of the AndroidLinux system is divided into four stages, such as figure 1 Shown: [0003] (1) BootLoader startup phase; [0004] (2) Linuxkernel startup phase; [0005] (3) The root file system (rootfs) is loaded, and some key system basic services are started; [0006] (4) Loading of the Android main file system (system), start the relevant functions of the Android system, until the Android main interface. It takes some time to respond to the four stages of the appeal, so that the Linux system can fully boot. [0007] For an application based on the AndroidLinux system, it is generally divided into two parts: the kernel driver part and the application part of the user layer. For the video surveillance function, the kernel driver is called V4L2, and the ...

AI Technical Summary

Problems solved by technology

[0013] At the same time, one of the more commonly used methods at present is to do standby after turning off the engine, and wake up directly when the ignition is next time. This solution has unpredictable risks for the car battery. If it is not turned on for a long time, the battery power may be reduced. There may also be abnormalities during standby, which will directly cause the battery power to be consumed without standby.

Moreover, this method is only applicable to the situation of reversing from the dormant standby state after the car is started, and cannot solve the problem of fast response reversing monitoring of the first cold start of the car. System and method", publication number is: Chinese patent of CN102756691A;

[0014] Another implementation method is to set a device driver on the kernel side to poll whether to reverse the car and then switch the image to the screen. This method will take up the total boot time, and the versatility is not strong. Many functions need to be developed in the kernel. It is very limited and is generally suitable for sensors that directly output images.

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