海康sdk starter

项目介绍

基于海康威视网络摄像机和NVR录像机的SDK二次开发, 为解决web-sdk播放控件兼容性不友好(只能在低版本浏览器下才能播放)，rtsp回放延迟问题(8s以上延迟)，和多端设备播放兼容等问题。 主要实现了sdk实时预览、回放、抓图等功能, rtsp推流 （无需nginx推流即可播放）

快速开始

maven 依赖

指定仓库地址

<repositories>
    <repository>
        <id>jitpack.io</id>
        <url>https://jitpack.io</url>
    </repository>
</repositories>

maven 坐标

<dependency>
    <groupId>com.github.waimifeier</groupId>
    <artifactId>hikvision-spring-boot-starter</artifactId>
    <version>最新版本</version>
</dependency>

项目配置

# 配置海康威视 sdk 位置
hik:
  sdk-path: classpath:sdk/win

案例

rtsp推流

1.rtsp 实时预览

@GetMapping(value = "/video/rtspReal.flv",produces = {"video/x-flv;charset=UTF-8"})
public void flvRtspReal(HttpServletResponse response,HttpServletRequest request){

    AsyncContext asyncContext = request.startAsync();
    asyncContext.setTimeout(0);

    String rtspUrl = HkUtils.toRtspUrl("ip", "推流端口", "账号", "密码","通道号");
    try {
        HkUtils.rtspToFlv(rtspUrl,asyncContext);
    }catch (Exception e){
        e.printStackTrace();
    }
}

2.rtsp回放预览

目前接入的海康设备rtsp回放不太稳定，会经常播放不了(不知道是不是设备的问题)，即使能播放也有很大的延迟

@GetMapping(value = "/video/rtspBack.flv",produces = {"video/x-flv;charset=UTF-8"})
public void flvRtspBack(HttpServletResponse response,HttpServletRequest request){

    AsyncContext asyncContext = request.startAsync();
    asyncContext.setTimeout(0);
    // 获取rtsp回放地址
    String rtspUrl = HkUtils.toRtspUrl("ip", "推流端口", "账号", "密码","通道号","2023-03-10 12:00:00","2023-03-10 13:00:00");
    try {
        HkUtils.rtspToFlv(rtspUrl,asyncContext);
    }catch (Exception e){
        e.printStackTrace();
    }
}

sdk推流

sdk 推流，实际上就是调用了海康的sdk，完成了一次播放预览，通过抓流得到码流数据。 播放画面过多，比较耗性能。

1. sdk 实时预览

/**
 * 实时预览
 */
@GetMapping(value = "/video/sdkReal.flv",produces = {"video/x-flv;charset=UTF-8"})
    public void flvSdkReal(HttpServletResponse response,HttpServletRequest request){

        AsyncContext asyncContext = request.startAsync();
        asyncContext.setTimeout(0);

        // sdk抓流，必须登陆
        CameraLogin cameraLogin = HkUtils.doLogin("ip", "端口", "账号", "密码");

        // 开启实时预览 （参数二为通道号，可从登陆信息获取到）
        VideoPreview videoPreview = HkUtils.startRelaPlay(cameraLogin.getUserId(),17);
        PipedOutputStream outputStream = videoPreview.getOutputStream();
        PipedInputStream inputStream = new PipedInputStream();
        try {
            inputStream.connect(outputStream);
            byte[] bytes = new byte[1024];
            int len = 0;
            while ((len = inputStream.read(bytes)) != -1) {
                asyncContext.getResponse().getOutputStream().write(bytes);
                response.setContentType("video/x-flv");
                response.setHeader("Connection", "keep-alive");
                response.setStatus(HttpServletResponse.SC_OK);
                response.flushBuffer();
            }
        }catch (Exception e){
            e.printStackTrace();
        } finally {
            try {
                asyncContext.complete();
                HkUtils.stopRelaPlay(videoPreview.getPlayHandler()); // 记得关闭预览
                if(outputStream!=null) outputStream.close();
                if(inputStream!=null) inputStream.close();
            } catch (Exception e){
                e.printStackTrace();
            }
        }
    }

2. sdk 回放预览

/**
 * 回放预览
 */
@GetMapping(value = "/video/sdkBack.flv",produces = {"video/x-flv;charset=UTF-8"})
    public void flvSdkBack(HttpServletResponse response,HttpServletRequest request){

        AsyncContext asyncContext = request.startAsync();
        asyncContext.setTimeout(0);

        // sdk抓流，必须登陆
        CameraLogin cameraLogin = HkUtils.doLogin("ip", "端口", "账号", "密码");

        // 开启实时预览 （参数二为通道号，可从登陆信息获取到）
        VideoPreview videoPreview = HkUtils.startBackPlay(cameraLogin.getUserId(),17,"开始时间","结束时间");
        PipedOutputStream outputStream = videoPreview.getOutputStream();
        PipedInputStream inputStream = new PipedInputStream();
        try {
            inputStream.connect(outputStream);
            byte[] bytes = new byte[1024];
            int len = 0;
            while ((len = inputStream.read(bytes)) != -1) {
                asyncContext.getResponse().getOutputStream().write(bytes);
                response.setContentType("video/x-flv");
                response.setHeader("Connection", "keep-alive");
                response.setStatus(HttpServletResponse.SC_OK);
                response.flushBuffer();
            }
        }catch (Exception e){
            e.printStackTrace();
        } finally {
            try {
                asyncContext.complete();
                HkUtils.stopBackPlay(videoPreview.getPlayHandler()); // 记得关闭回放预览
                if(outputStream!=null) outputStream.close();
                if(inputStream!=null) inputStream.close();
            } catch (Exception e){
                e.printStackTrace();
            }
        }
    }