vue+flv.js+SpringBoot+websocket实现视频监控与回放功能

2024-04-02 19:04:59 177人浏览安东尼

摘要

目录需求:思路:准备工作:实现:最后:需求: Vue+SpringBoot的项目,需要在页面展示出海康的硬盘录像机连接的摄像头的实时监控画面以及回放功能. 之前项目里是纯前端实现视频

需求:

Vue+SpringBoot的项目,需要在页面展示出海康的硬盘录像机连接的摄像头的实时监控画面以及回放功能.

之前项目里是纯前端实现视频监控和回放功能.但是有局限性.就是ip地址必须固定.新的需求里设备ip不固定.所以必须换一种思路.
通过设备的主动注册,让设备去主动连接服务器后端通过Socket推流给前端实现实时监控和回放功能；

思路:

1：初始化设备.后端项目启动时就调用初始化方法.
2：开启socket连接.前端页面加载时尝试连接socket.
3：点击播放,调用后端推流接口.并且前端使用flv.js实现播放.

准备工作:

1:vue项目引入flv.js。
npm install --save flv.js
main.js里面引入
import flvjs from ‘flv.js’;
Vue.use(flvjs)
但是这里我遇见一个坑.开发模式没有问题.但是打包之后发现ie浏览器报语法错误.不支持此引用.所以修改引用地址.
在webpack.base.conf.js的module.exports下添加

resolve: {
    extensions: ['.js', '.vue', '.JSON'],
    alias: {
      'vue$': 'vue/dist/vue.esm.js',
      '@': resolve('src'),
      'flvjs':'flv.js/dist/flv.js'
    }
  },

plugins下添加

  plugins: [
    new WEBpack.ProvidePlugin({
      flvjs:'flvjs',
      $: "Jquery",
      jQuery: "jquery",
      "window.jQuery": "jquery"
    })
  ],

最后页面引入时:

import flvjs from "flv.js/dist/flv.js";

2.准备一个硬盘录像机,并添加一个摄像头设备以做测试使用.
硬盘录像机设置为主动注册模式.并配置好ip和端口以及子设备ID

在这里插入图片描述

在设置里的网络设置里面

在这里插入图片描述

3.后端搭建好websocket工具类
包含通用的OnOpen,onClose,onError等方法.

实现:

1.项目启动开启设备服务.这个SDKLIB里面都有就不介绍了.
2.页面加载尝试开启socket连接.

//尝试连接websocket
    startSocket(channelnum, device_value) {
      try {
        let videoWin = document.getElementById(this.currentSelect);
        if (flvjs.isSupported()) {
          let websocketName =
            "/device/monitor/videoConnection/" + channelnum + device_value;
          console.log("进入连接websocket", this.ipurl + websocketName);
          const flvPlayer = flvjs.createPlayer(
            {
              type: "flv",
              //是否是实时流
              isLive: true,
              //是否有音频
              hasAudio: false,
              url: this.ipurl + websocketName,
              enableStashBuffer: true,
            },
            {
              enableStashBuffer: false,
              stashInitialSize: 128,
            }
          );
          flvPlayer.on("error", (err) => {
            console.log("err", err);
          });
          flvjs.getFeatureList();
          flvPlayer.attachMediaElement(videoWin);
          flvPlayer.load();
          flvPlayer.play();
          return true;
        }
      } catch (error) {
        console.log("连接websocket异常", error);
        return false;
      }
    },

这里传的参数是通道号和设备信息.无需在意.只要是唯一key就可以.

2.socket连接成功后.调用后端推流方法实现播放.
这里说一下后端的推流方法.
调用SDK里的CLIENT_RealPlayByDataType方法


    public long preview(long loginHandler, int channel, NetSDKLib.fRealDataCallBackEx realDataCallBackEx, fRealDataCallBackEx2 realPlayDataCallback, int emDataType, int rType, boolean saveFile, int emAudioType) {
        NetSDKLib.net_IN_REALPLAY_BY_DATA_TYPE inParam = new NetSDKLib.NET_IN_REALPLAY_BY_DATA_TYPE();
        NetSDKLib.NET_OUT_REALPLAY_BY_DATA_TYPE outParam = new NetSDKLib.NET_OUT_REALPLAY_BY_DATA_TYPE();
        inParam.nChannelID = channel;
        inParam.rType = rType;
        if(realDataCallBackEx!=null){
            inParam.cbRealData=realDataCallBackEx;
        }
        if(realPlayDataCallback!=null){
            inParam.cbRealDataEx = realPlayDataCallback;
        }
        inParam.emDataType = emDataType;
        inParam.emAudioType=emAudioType;
        if (saveFile) {
            inParam.szSaveFileName = UUID.randomUUID().toString().replace(".", "").replace("-", "") + "." + EMRealDataType.getRealDataType(emDataType).getFileType();
        }
        NetSDKLib.LLong realPlayHandler = netsdk.CLIENT_RealPlayByDataType(new NetSDKLib.LLong(loginHandler), inParam, outParam, 3000);
        if (realPlayHandler.longValue() != 0) {
            netsdk.CLIENT_MakeKeyFrame(new NetSDKLib.LLong(loginHandler),channel,0);
            RealPlayInfo info = new RealPlayInfo(loginHandler, emDataType, channel, rType);
            realPlayHandlers.put(realPlayHandler.longValue(), info);
        } else {
            log.error("realplay failed.error is " + ENUMERROR.getErrORMessage(), this);
        }
        return realPlayHandler.longValue();
    }

注意:这里的码流类型选择flv.
回调函数里面:

// 回调建议写成单例模式, 回调里处理数据，需要另开线程
    @Autowired
    private WebSocketServer server;
    private Log log = Log.get(WebSocketRealDataCallback.class);

    @Override
    public void invoke(NetSDKLib.LLong lRealHandle, int dwDataType, Pointer pBuffer, int dwBufSize, int param, Pointer dwUser) {
        RealPlayInfo info = Deviceapi.realPlayHandlers.get(lRealHandle.longValue());
        if (info != null && info.getLoginHandler() != 0) {
            //过滤码流
            byte[] buffer = pBuffer.getByteArray(0, dwBufSize);
            if (info.getEmDataType() == 0 || info.getEmDataType() == 3) {
                //选择私有码流或mp4码流,拉流出的码流都是私有码流
                if (dwDataType == 0) {
                    log.info(dwDataType + ",length:" + buffer.length + " " + Arrays.toString(buffer), WebSocketRealDataCallback.class);
                    sendBuffer(buffer, lRealHandle.longValue());
                }
            } else if ((dwDataType - 1000) == info.getEmDataType()) {
                log.info(dwDataType + ",length: " + buffer.length + Arrays.toString(buffer), WebSocketRealDataCallback.class);
                sendBuffer(pBuffer.getByteArray(0, dwBufSize), lRealHandle.longValue());
            }
        }
    }

以及调用Websocket里面的sendMessageToOne发送给指定客户端


    private static void sendBuffer(byte[] bytes, long realPlayHandler) {
        
        ByteBuffer buffer = ByteBuffer.wrap(bytes);
        server.sendMessageToOne(realPlayHandler, buffer);
    }

这里传的参数是设备初始化的时候得到的登录句柄.以及流数据.


    public void sendMessageToOne(long realPlayHandler, ByteBuffer buffer) {
        //登录句柄无效
        if (realPlayHandler == 0) {
            log.error("loginHandler is invalid.please check.", this);
            return;
        }
        RealPlayInfo realPlayInfo = AutoReGISterEventModule.findRealPlayInfo(realPlayHandler);
        if(realPlayInfo == null){
            //连接已断开
        }
        String key = realPlayInfo.getChannel()+realPlayInfo.getSbbh();
        Session session = sessions.get(key);
        if (session != null) {
            synchronized (session) {
                try {
                    session.getBasicRemote().sendBinary(buffer);
                    byte[] bytes=new byte[buffer.limit()];
                    buffer.get(bytes);
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
        } else {

            //log.error("session is null.please check.", this);
        }
    }

这样就实现了视频监控.

效果:

在这里插入图片描述

分享一下websocket代码:

package com.dahuatech.netsdk.webpreview.websocket;
import cn.hutool.log.Log;
import cn.hutool.log.LogFactory;
import org.springframework.stereotype.Component;
import javax.websocket.*;
import javax.websocket.server.PathParam;
import javax.websocket.server.ServerEndpoint;
import java.io.FileOutputStream;
import java.io.IOException;
import java.NIO.ByteBuffer;
import java.util.Map;
import java.util.concurrent.ConcurrentHashMap;
import java.util.concurrent.atomic.AtomicInteger;

@ServerEndpoint("/websocket/{realPlayHandler}")
@Component
public class WebSocketServer {
    private static Log log = LogFactory.get(WebSocketServer.class);
    private FileOutputStream outputStream;
    
    private final AtomicInteger onlineCount = new AtomicInteger(0);
    
    public static ConcurrentHashMap<Long, Session> sessions = new ConcurrentHashMap<>();
    
    
    @OnOpen
    public void OnOpen(@PathParam("realPlayHandler") long realPlayHandler, Session session) {
        if (sessions.containsKey(realPlayHandler)) {
            sessions.put(realPlayHandler, session);
        } else {
            sessions.put(realPlayHandler, session);
            addOnlineCount();
        }
        log.info("websocket connect.session: " + session);
    }
    
    @OnClose
    public void onClose(@PathParam("realPlayHandler") Long realPlayHandler, Session session) {
        if (sessions.containsKey(realPlayHandler)) {
            sessions.remove(realPlayHandler);
            subOnlineCount();
        }
    }
    
    @OnError
    public void onError(Throwable throwable) {
        throwable.printStackTrace();
    }
    
    @OnMessage
    public void onMessage(ByteBuffer message) {
        log.info("服务端收到客户端发来的消息: {}", message);
    }
    
    @OnMessage
    public void onMessage(String message) {
        log.info("服务端收到客户端发来的消息: {}", message);
    }
    
    public void sendAll(String message) {
        for (Map.Entry<Long, Session> session : sessions.entrySet()) {
            session.getValue().getAsyncRemote().sendText(message);
        }
    }
    
    public void sendMessage(ByteBuffer buffer) {
        for (Map.Entry<Long, Session> session : sessions.entrySet()) {
            session.getValue().getAsyncRemote().sendBinary(buffer);
        }
    }
    
    public void sendMessageToOne(long realPlayHandler, ByteBuffer buffer) {
        //登录句柄无效
        if (realPlayHandler == 0) {
            log.error("loginHandler is invalid.please check.", this);
            return;
        }
        Session session = sessions.get(realPlayHandler);
        if (session != null) {
            synchronized (session) {
                try {
                    session.getBasicRemote().sendBinary(buffer);
                    byte[] bytes=new byte[buffer.limit()];
                    buffer.get(bytes);
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
        } else {
            //log.error("session is null.please check.", this);
        }
    }
    public void sendMessageToAll(ByteBuffer buffer) {
        for (Session session : sessions.values()) {
            synchronized (session) {
                try {
                    
                    session.getBasicRemote().sendBinary(buffer);
                } catch (Exception e) {
                    e.printStackTrace();
                }
            }
        }
    }
    
    public void closeSession(long realPlayHandler) {
        try {
            Session session = sessions.get(realPlayHandler);
            if (session != null) {
                session.close();
            }
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
    
    public int getOnlineCount() {
        return onlineCount.get();
    }
    
    public int addOnlineCount() {
        return onlineCount.getAndIncrement();
    }
    
    public int subOnlineCount() {
        return onlineCount.getAndDecrement();
    }
}

遇见的坑:
前端在播放的时候一开始始终不出画面.流数据已经拉过来了.后来才发现是因为hasAudio参数

在这里插入图片描述