目录

一、前情提要

1. 作用

2. 准备一

3. 准备二

4. 准备三 

二、开始使用 

1. 安装依赖

2. 下载streamedian.js文件

3. 代码

HTML

JS

---

一、前情提要

1. 作用

作用 : 使用 streamedian 播放 rtsp 格式的视频流

2. 准备一

需要后端的支持

3. 准备二

rtsp流需要有对应的websock地址

拥有了rtsp流地址和websock地址这两样，才能播放

4. 准备三 

若是现场环境，需要连接VPN

二、开始使用 

1. 安装依赖

npm install long   ---   npm install babel-polyfill

2. 下载streamedian.js文件

我的资料库中可以下载，实在太长，这里放不下

网址 : streamedian.min.js

3. 代码

HTML

<template>
  <div class="about-layout">
    <input type="button" value="play" @click="onPlay" id="play" />

    <div id="container">
      <div id="video_overlays"></div>
      <canvas id="canvas" width="1280" height="720"></canvas>
      <video id="test_video" autoplay muted></video>
    </div>
    <p id="error_msg"></p>
  </div>
</template>

JS

import "./js/streamedian.min.js";
export default {
  name: "playVideo",
  data() {
    return {
      videoRtsp:
        "rtsp://rtsp的地址",
      videoWs: "ws://websock的地址",       
      ObjectType: {},
      p: null,
      player: null,
      canvas: null,
      heatmapRenderer: null,
      scale: 0,
    };
  },
  props: {
    videoPath: {    //传过来的rtsp的地址
      type: String,
      default: "",
    },
  },
  methods: {
    //关闭弹窗
    closeVideo() {
      this.$emit("closeVideo");
    },
    //初始化数据
    init() {
      this.player = document.getElementById("test_video");

      this.canvas = document.getElementById("canvas");
      var config = {
        canvas: canvas,
        canvasWidth: 1280,
        canvasHeight: 720,
        enableSmoothing: true,
        pixelAlpha: 255,
        colormap: null, //use default
      };

      this.heatmapRenderer = Streamedian.heatmapRenderer(config);
    },
    update(currentTime, previewInfo) {
      if (previewInfo) {
        previewInfo.objects.forEach(function (target) {
          if (
            target &&
            target.objectType == 6 &&
            target.crowd &&
            target.crowd.densitySize.width
          ) {
            var start = Date.now();
            // console.log(bytesToHex(target.crowd.density));
            this.heatmapRenderer.render(
              target.crowd.density,
              target.crowd.densitySize.width,
              target.crowd.densitySize.height
            );
            var millis = Date.now() - start;
            console.log("milli seconds elapsed = " + Math.floor(millis));
          }
          let items = [];
          if (target.attributes && PreviewInfoMap[target.objectType]) {
            for (let i in PreviewInfoMap[target.objectType].attrs) {
              let title = PreviewInfoMap[target.objectType].attrs[i];
              let value = target.attributes[i];
              if (value && attributeEnabled(target.objectType, i)) {
                items.push("" + title + ": " + value);
              }
            }
          }
          if (!target.bounding) {
            return;
          }
        });
      }
    },
    reconnectHandler(e) {
      return new Promise((resolve, reject) => {
        document.getElementById(
          "error_msg"
        ).innerHTML = `连接错误${e.code}: ${e.msg}`;
        document.getElementById("operators").style.display = "unset";
        document.getElementById("reconnect").addEventListener("click", () => {
          document.getElementById("error_msg").innerHTML = "";
          document.getElementById("operators").style.display = "none";
          resolve();
        });
        document.getElementById("cancel").addEventListener("click", () => {
          document.getElementById("error_msg").innerHTML = "已断开连接";
          document.getElementById("operators").style.display = "none";
          reject();
        });
      });
    },
    onPlay() {
      document.getElementById("error_msg").innerHTML = "";
      let host = this.videoWs;
      let source = this.videoRtsp;
      console.log("PLAY: ", source);
      if (this.p) {
        this.p.destroy();
      }
      this.p = Streamedian.player("test_video", {
        socket: host,
        reconnectHandler: this.reconnectHandler,
      });
      this.p.setSource(source, "rtsp");
      document
        .getElementById("test_video")
        .addEventListener("error", function (e) {
          console.error(e);
        });
      this.animLoop();
      return true;
    },
    animLoop() {
      var running,
        lastFrame = window.performance.now();
      let player = this.player;
      let p = this.p;
      let that = this;
      function loop(now) {
        if (running !== false) {
          requestAnimationFrame(loop);
          let videoWidth = player.videoWidth;
          let scale = 0;
          if (videoWidth > 0) {
            scale = 1280.0 / videoWidth;
            that.scale = scale;
          }
          let ev = p.pullOOBData(player.currentTime + 0.01);
          if (ev && ev.length > 0) {
            ev.forEach(function (last) {
              let seiID = last.payload.subarray(0, 16).toString();
              if (scale > 0 && last.foundIDR && PreviewInfo) {
                let pi = PreviewInfo.decode(last.payload.subarray(16));
                console.log("decoded = ", JSON.stringify(pi));
                overlay.update(now, pi);
              }
            });
          } else {
            that.update(now, null);
          }
          lastFrame = now;
        }
      }
      loop(lastFrame);
    },
  },
  mounted() {
    this.init();
  },
};