Key elements to improve secondary development skills of Java Hikvision SDK

Key elements to improve Java Hikvision SDK secondary development skills

Abstract: With the rapid development of the Internet of Things, video surveillance systems are increasingly used in the security field widely. As the most important component of the video surveillance system, Hikvision’s SDK plays an important role in the secondary development process. This article will introduce the basic usage of Hikvision SDK and provide some key elements and code examples to help readers improve their Java Hikvision SDK secondary development skills.

1. Understand the basic concepts of Hikvision SDK

Before starting to learn the secondary development of Hikvision SDK, we first need to understand some basic concepts. Hikvision SDK is developed based on Java language and is a toolkit used to implement communication and control with Hikvision devices. When communicating with Hikvision devices through the SDK, we need to use some key concepts, such as device management, preview, screenshots, etc.

2. Master the basic usage of Hikvision SDK

1. Introduce SDK dependencies
   To use Hikvision SDK, you first need to introduce the corresponding dependency packages into the project. SDK jar files can be introduced through maven and other methods.
2. Initialize SDK
   When the program starts, Hikvision SDK needs to be initialized. Initialization can be completed through the following code:

HCNetSDK hcnetsdk = HCNetSDK.INSTANCE;
hcnetsdk.NET_DVR_Init();

3. Log in to the device
   Before establishing communication with the Hikvision device, you need to log in to the device. Login can be completed through the following code:

IntByReference userID = new IntByReference();
NET_DVR_DEVICEINFO_V30 deviceInfo = new NET_DVR_DEVICEINFO_V30();
userID.setValue(hcnetsdk.NET_DVR_Login_V30(deviceIP, devicePort, userName, password, deviceInfo));

4. Preview
   Preview is one of the core functions of video surveillance using Hikvision SDK. Preview can be achieved through the following code:

LONG realPlayHandle = hcnetsdk.NET_DVR_RealPlay_V30(userID.getValue(), cameraInfo, null, null, true);

During the preview process, you can also obtain real-time video data and do some processing, such as displaying it on the interface, saving it as a file, etc.

5. Capture images
   Haikang SDK also provides the function of capturing images, which can be achieved through the following code:

hcnetsdk.NET_DVR_CaptureJPEGPicture(LONG realPlayHandle, filePath);

6. Destroy SDK
   When the program exits, Hikvision SDK needs to be destroyed to release resources:

hcnetsdk.NET_DVR_Cleanup();

3. Key elements for improving secondary development skills

1. Understand Hikvision SDK documentation
   Haikang SDK documentation is an important reference for learning secondary development. To improve your skills, you need to carefully read and understand the interfaces, parameters and other information provided in the SDK documentation.
2. Write concise and efficient code
   In the secondary development process, writing concise and efficient code is crucial. By fully understanding the interfaces provided by Hikvision SDK, you can optimize the code structure and improve the readability and execution efficiency of the code.
3. Practice and Summary
   Continuous practice in actual secondary development projects and summary of experience can continuously improve skills. By communicating with others and participating in relevant technical forums, you can broaden your horizons and learn more about development skills and best practices.

4. Code Example

The following is a simple example code that demonstrates how to use Hikvision SDK to implement the preview function of video surveillance:

public class HikvisionPreviewDemo {
    public static void main(String[] args) {
        HCNetSDK hcnetsdk = HCNetSDK.INSTANCE;
        hcnetsdk.NET_DVR_Init();

        IntByReference userID = new IntByReference();
        NET_DVR_DEVICEINFO_V30 deviceInfo = new NET_DVR_DEVICEINFO_V30();
        userID.setValue(hcnetsdk.NET_DVR_Login_V30(deviceIP, devicePort, userName, password, deviceInfo));

        NativeLong realPlayHandle = hcnetsdk.NET_DVR_RealPlay_V30(userID.getValue(), cameraInfo, null, null, true);

        // 等待预览结束
        // ....

        hcnetsdk.NET_DVR_StopRealPlay(realPlayHandle);
        hcnetsdk.NET_DVR_Logout(userID.getValue());
        hcnetsdk.NET_DVR_Cleanup();
    }
}

Summary: By understanding the basic concepts of Hikvision SDK, mastering its basic usage, and combining key elements and code examples, readers can improve their Java Hikvision SDK secondary development skills. By continuously learning and summarizing in practice, and maintaining communication with the technical community, you will be able to apply the SDK more proficiently to develop a more powerful and efficient video surveillance system.

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