Node.js安装：
参考这个
Nodejs安装教程
安装完成之后，记得修改一下npm源：

npm config set registry https://registry.npmmirror.com

下一步，安装node-media-server

npm install node-media-server

参考这个：安装ffmpeg
下一步：创建js脚本 app.js，内容如下：

const fs = require('fs');
const path = require('path');
const spawn = require('child_process').spawn;
const async = require('async');
const NodeMediaServer = require('node-media-server');// 创建node-media-server实例
const nmsConfig = {rtmp: {port: 9999,chunk_size: 60000,gop_cache: true,ping: 60,ping_timeout: 30},http: {port: 8000,mediaroot: './media',allow_origin: '*'}
};
const nms = new NodeMediaServer(nmsConfig);
nms.run();// 根据指定的目录和文件类型创建要推流的文件列表
const videoDir = 'E:\Build';
const allowedExtensions = ['.mp4', '.avi', '.mov'];const fileList = [];
fs.readdirSync(videoDir).forEach(file => {const fileExtension = path.extname(file);if (allowedExtensions.includes(fileExtension)) {fileList.push(path.join(videoDir, file));}
});if (!fileList.length) {console.log('No video files found!');process.exit(1);
}// 配置FFmpeg推流命令行参数
const ffmpegCommand = `ffmpeg -re -stream_loop -1 -i "$input$"  -c copy -f flv "$output$"`;
const ffmpegEscapeMap = { '$input$': '', '$output$': '' };let index = 0;
const maxIndex = fileList.length - 1;async.each(fileList, (videoPath, callback) => {// 构建FFmpeg命令行参数ffmpegEscapeMap['$input$'] = videoPath;// node-media-server IP即可，无需填写端口默认端口1935 服务端获取的RTMP流也是这个地址ffmpegEscapeMap['$output$'] = `rtmp://88.22.10.113:9999/live/test`;const output = `rtmp:88.22.10.113:9999/live/test`;const command = ffmpegCommand.replace(/\$\w+\$/g, m => ffmpegEscapeMap[m]);console.log(`Starting streaming for file: ${videoPath}...`);// 调用FFmpeg推流const ffProcess = spawn("ffmpeg",['-re','-stream_loop','-1','-i',videoPath,'-c','copy','-f','flv',output], { detached: true });// 捕捉事件ffProcess.on('exit', () => {console.log(`Stop streaming for file: ${videoPath}.`);if (++index > maxIndex) {index = 0; // 循环推流}});ffProcess.on('close', code => {console.log(`Process ${path.parse(videoPath).name} exited with code ${code}`);if (++index > maxIndex) {index = 0; // 循环推流}});ffProcess.stderr.on('data', (data) => {console.log(`${videoPath}: ${data.toString()}`);});callback();
})
console.log(`Started pushing ${fileList.length} stream(s) to node-media-server on rtmp://88.22.10.113:9999/live/.`);

，记得修改里面的videoDir以及ip地址。
最后node app.js，至此已经推流成功。
测试：安装vlc播放器，然后播放网络流，地址：rtmp://88.22.10.113:9999/live/test，记得修改IP

// 推送视频:ffmpeg -re -i 视频名称 -c copy -f flv rtmp://ip:1935/live/STREAM_NAME
// 推送摄像头:ffmpeg -f dshow -i video="USB Video Device" -vcodec libx264 -pix_fmt yuv420p -preset veryfast -f flv rtmp://88.22.10.113:9999/live
// 推送屏幕:ffmpeg -f avfoundation -i "1" -vcodec libx264 -preset ultrafast -acodec libfaac -f flv rtmp://ip:1935/live/STREAM_NAME