nodejs 推送图片到 RTMP 延时和花屏 有什么办法优化 - V2EX
yangheng4922

nodejs 推送图片到 RTMP 延时和花屏 有什么办法优化

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  •   yangheng4922 Jul 6, 2022 1626 views
    This topic created in 1410 days ago, the information mentioned may be changed or developed.

    实现思路

    • nodeJS 获取到图片的 base64 数据
    • 通过 ffmpeg pipe 推送到 rtmp

    代码实现

    const child_process = require('child_process') let child = child_process.spawn('ffmpeg', [ '-f', 'image2pipe', '-i', '-', '-vcodec', 'libx264', '-f', 'flv', 'rtmp://127.0.0.1:56413/live/test' ]); child.stdout.on('data', function (data) { console.log(data.toString()); }); child.stderr.on('data', function (data) { console.log(data.toString()); }); child.on('close', (code, signal) => { console.log('ffmpeg 进程中断', code, signal); }); // 图片数据写入管道 function writeImg (base64) { let imgData = Buffer.from(base64, 'base64') child.stdin.write(imgData) } // 模拟循环获取图片数据 for (let i = 0; i < 100; i ++) { writeImg('/9j/4AAQSkZJRgABAQAA........') } 

    存在问题

    • 花屏问题
    • 延时累计

    不知道有什么方法可以优化

    2 replies    2022-07-12 00:47:33 +08:00
    codefredzeng
        1
    codefredzeng  
       Jul 11, 2022
    最先获取到的图片数据一定是 base64 吗?是不是可以考虑直接将图片的二进制数据喂给 ffmpeg ,不用经过 base64 转换?
    yangheng4922
        2
    yangheng4922  
    OP
       Jul 12, 2022
    @codefredzeng #1 转格式这一步没啥问题 我这边是应用层 算法那边给的就是 base64 的
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