Electron中利用fluent-ffmpeg进行视频推流

安装

代码语言：javascript复制

npm install --save fluent-ffmpeg

或者添加

代码语言：javascript复制

"dependencies": {
	"fluent-ffmpeg": "^2.1.2"
}

之后

代码语言：javascript复制

npm install

视频文件推流

引用及变量

代码语言：javascript复制

const ffmpeg = require('fluent-ffmpeg');

const ffmpegPath = "/Users/zhangjian/psvmc/app/me/electron/zjclass/libs/ffmpeg_mac/ffmpeg";
const inputPath = '/Users/zhangjian/psvmc/app/me/electron/zjclass/libs/mv.mp4';
const logo = '/Users/zhangjian/psvmc/app/me/electron/zjclass/libs/logo.png';  //水印
const outputPath = 'rtmp://119.3.212.205:1935/live/xiaoming';

具体的推流代码

代码语言：javascript复制

var command = ffmpeg(inputPath)
    .setFfmpegPath(ffmpegPath)
    .inputOptions('-re')
    .inputOptions('-ac 2')
    .addInput(logo)
    .complexFilter([{
        filter: 'scale',
        options: [600, -1],
        inputs: '[0:v]',
        outputs: 'video'
    }, {
        filter: 'scale',
        options: [60, -1],
        inputs: '[1:v]',
        outputs: 'logo'
    }, {
        filter: 'overlay',
        options: {
            x: 'main_w-overlay_w-15',
            y: 15
        },
        inputs: ['video', 'logo']
    }])
    .on('start', function (commandLine) {
        console.log('['   new Date()   '] Vedio is Pushing !');
        console.log('commandLine: '   commandLine);
    })
    .on('error', function (err, stdout, stderr) {
        console.log('error: '   err.message);
        console.log('stdout: '   stdout);
        console.log('stderr: '   stderr);
    })
    .on('end', function () {
        console.log('['   new Date()   '] Vedio Pushing is Finished !');
    })
    .addOptions([
        '-vcodec libx264',
        '-preset veryfast',
        '-crf 22',
        '-maxrate 1000k',
        '-bufsize 3000k',
        '-acodec libmp3lame',
        '-ac 2',
        '-ar 44100',
        '-b:a 96k'
    ])
    .format('flv');
command
    .output(outputPath, {
        end: true
    })
    .run();

桌面及麦克风推流(MAC)

代码语言：javascript复制

const ffmpeg = require('fluent-ffmpeg');
const ffmpegPath = "/Users/zhangjian/psvmc/app/me/electron/zjclass/libs/ffmpeg_mac/ffmpeg";
const outputPath = 'rtmp://119.3.212.205:1935/live/xiaoming';

let audioStream;
function getAudioStream() {
    navigator.mediaDevices.getUserMedia({audio: true, video: false})
        .then(function (stream) {
            audioStream = stream;
            pushStream();
            stream.onended = () => {
                console.log('Micro audio ended.')
            }
        })
        .catch(function (error) {
            console.log('getUserMedia() failed.')
        });
}


var command;
function pushStream() {
    command = ffmpeg("1:0")
        .setFfmpegPath(ffmpegPath)
        .inputOptions('-f avfoundation')
        .inputOptions('-framerate 30')
        .inputOptions('-video_size 640x480')
        .on('start', function (commandLine) {
            console.log('['   new Date()   '] Vedio is Pushing !');
            console.log('commandLine: '   commandLine);
        })
        .on('error', function (err, stdout, stderr) {
            console.log('error: '   err.message);
            console.log('stdout: '   stdout);
            console.log('stderr: '   stderr);
        })
        .on('end', function () {
            console.log('['   new Date()   '] Vedio Pushing is Finished !');
        })
        .addOptions([
            '-vcodec libx264',
            '-preset ultrafast',
            '-acodec libmp3lame'
        ])
        .format('flv');
    command
        .output(outputPath, {
            end: true
        })
        .run();
}

document.querySelector(".start_action").addEventListener("click", function () {
    // 只是获取麦克风录制权限
    getAudioStream();
});

document.querySelector(".stop_action").addEventListener("click", function () {
    if(command){
        command.kill();
    }
});

桌面 麦克风推流(Win)

代码语言：javascript复制

const ffmpeg = require('fluent-ffmpeg');
const ffmpegPath = __dirname "\..\libs\ffmpeg.exe";
let command = null;

command = ffmpeg()
    .setFfmpegPath(ffmpegPath)
    .input('desktop')
    .inputFormat('gdigrab')
    .input('audio=麦克风 (2- High Definition Audio 设备)')
    .inputFormat('dshow')
    .addOptions([
        '-vcodec libx264',
        '-preset ultrafast',
        '-acodec libmp3lame',
        '-pix_fmt yuv422p'
    ])
    .format('flv')
    .output(outputPath, {
        end: true
    })
    .on('start', function (commandLine) {
        console.log('['   new Date()   '] Vedio is Pushing !');
        console.log('commandLine: '   commandLine);
    })
    .on('error', function (err, stdout, stderr) {
        console.log('error: '   err.message);
    })
    .on('end', function () {
        console.log('['   new Date()   '] Vedio Pushing is Finished !');
    });
command.run();

注意audio=麦克风 (2- High Definition Audio 设备)后面的中文名称不要用双引号括起来，括起来后推流是报错的！ 引用的文件路径中的反斜杠也要注意。

这样其实生成的命令如下

代码语言：javascript复制

ffmpeg -f gdigrab -i desktop -f dshow -i audio=麦克风 (2- High Definition Audio 设备) -vcodec libx264 -preset ultrafast -acodec libmp3lame -pix_fmt yuv422p -f flv rtmp://39.104.23.195:1935/live/xiaoming

但是这样的命令直接在cmd中无法运行 要把麦克风名字用双引号括起来才能运行

代码语言：javascript复制

ffmpeg -f gdigrab -i desktop -f dshow -i audio="麦克风 (2- High Definition Audio 设备)" -vcodec libx264 -preset ultrafast -acodec libmp3lame -pix_fmt yuv422p -f flv rtmp://39.104.23.195:1935/live/xiaoming

这两个地方不一样真是折腾死我了，花了大半天才找到原因。

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