如何在heroku上部署Node Media Server应用

Question

我正在尝试部署NodeJS实时流服务器，该服务器可使用node-media-server和socket.io在基于rtmp服务器构建的heroku上运行。我在启动node-media-server时遇到问题，因为它需要2个端口来按照配置格式运行：

const NodeMediaServer = require('node-media-server');


const config = {
  rtmp: {
    port: 1935,
    chunk_size: 60000,
    gop_cache: true,
    ping: 30,
    ping_timeout: 60
  },
  http: {
    port: 8000,
    allow_origin: '*'
  }
};

var nms = new NodeMediaServer(config)
nms.run();

我已经尝试通过遵循官方guide在新的heroku应用程序上部署应用程序。由于Heroku每个dyno仅提供一个端口，因此可以在我的heroku应用仪表板上获得这些日志：

2020-04-07T23:08:24.289041+00:00 app[web.1]: 4/7/2020 23:08:24 23 [ERROR] Node Media Trans Server startup failed. ffmpeg:/usr/local/bin/ffmpeg cannot be executed.
2020-04-07T23:08:24.290753+00:00 app[web.1]: (node:23) DeprecationWarning: current Server Discovery and Monitoring engine is deprecated, and will be removed in a future version. To use the new Server Discover and Monitoring engine, pass option { useUnifiedTopology: true } to the MongoClient constructor.
2020-04-07T23:08:24.291397+00:00 app[web.1]: listening on port 19586
2020-04-07T23:08:24.292059+00:00 app[web.1]: 4/7/2020 23:08:24 23 [ERROR] Node Media Rtmp Server Error: listen EADDRINUSE: address already in use :::19586
2020-04-07T23:08:24.292694+00:00 app[web.1]: 4/7/2020 23:08:24 23 [ERROR] Node Media Http Server Error: listen EADDRINUSE: address already in use :::19586
2020-04-07T23:08:24.293383+00:00 app[web.1]: 4/7/2020 23:08:24 23 [ERROR] Node Media WebSocket Server Error: listen EADDRINUSE: address already in use :::19586
2020-04-07T23:08:24.682440+00:00 heroku[web.1]: State changed from starting to up
2020-04-07T23:08:24.693405+00:00 app[web.1]: Connected to the database

我需要知道如何将我的应用程序部署在heroku（或任何其他替代方案）上，以使其在生产模式下可用。我的服务器可以在MacBook Pro上正常工作。这是我的代码：

const { NodeMediaServer } = require('node-media-server');
const express = require('express');
const mongoose = require('mongoose');

const app = express();
const http = require('http');
const fs = require('fs');
const bodyParser = require('body-parser');
const path = require('path');
const process = require('process')
const port = process.env.PORT||5000
const port2 = process.env.PORT||8000
const port3 = process.env.PORT||8001


const server = http.createServer(app);
const io = require('socket.io').listen(server);
require('./app/controllers/socketIO')(io);

mongoose.Promise = global.Promise;
global.appRoot = path.resolve(__dirname);

mongoose.connect(
  "mongodb://databasecredentials",
  { useNewUrlParser: true },
  err => {
    if (err) {
      console.log(err);
    } else {
      console.log('Connected to the database');
    }
  }
);

app.use(
  bodyParser.urlencoded({
    extended: true
  })
);
app.use(bodyParser.json());
app.set('socketio', io);
app.set('server', server);
app.use(express.static(`${__dirname}/public`));

server.listen(port, err => {
  if (err) {
    console.log(err);
  } else {
    console.log(`listening on port ${port}`);
  }
});

const nodeMediaServerConfig = {
  rtmp: {
    port: port2,
    chunk_size: 60000,
    gop_cache: true,
    ping: 60,
    ping_timeout: 30
  },
  http: {
    port: port3,
    mediaroot: './media',
    allow_origin: '*'
  },
  trans: {
    ffmpeg: '/usr/local/bin/ffmpeg',
    tasks: [
      {
        app: 'live',
        ac: 'aac',
        mp4: true,
        mp4Flags: '[movflags=faststart]'
      }
    ]
  }
};

var nms = new NodeMediaServer(nodeMediaServerConfig);
nms.run();

Answer 1

我对Heroku不太熟悉，但是在日志的第一行中指出：

[[ERROR]]节点Media Trans Server启动失败。 ffmpeg：/ usr / local / bin / ffmpeg无法执行。

您需要在运行代码的计算机上安装ffmpeg。我正在尝试做类似的GCP。为了使其运行，我创建了一个package.json文件，并将开始脚本设置为apt install --fix-missing --assume-yes ffmpeg && node app.js作为临时解决方法：

{
    "name": "app-service-hello-world",
    "description": "Simple Hello World Node.js sample for Azure App Service",
    "version": "0.0.1",
    "private": true,
    "license": "MIT",
    "author": "Microsoft",
    "scripts": {
        "start": "apt install --fix-missing --assume-yes ffmpeg && node app.js"
    },
    "dependencies": {
        "node-media-server": "^2.1.9"
    }
}

这可能有助于您将ffmpeg正确添加到Heroku环境：Install FFMPEG on Heroku