尝试使用Node.js + FFMPEG实时应用水印

如何解决尝试使用Node.js + FFMPEG实时应用水印

我正在尝试使用Node.js express编写流式视频服务器。视频服务器的主要任务是在视频上应用水印。这是我的代码

const express = require("express");
const fs = require("fs");
const path = require("path");
const ffmpeg = require("fluent-ffmpeg");
const ffmpegInstaller = require("@ffmpeg-installer/ffmpeg");
ffmpeg.setFfmpegPath(ffmpegInstaller.path);
const app = express();

app.get("/",function (req,res) {
  const path = req.query.video;
  const WATERMARK_PATH = req.query.id + `.png`;

  const stat = fs.statSync(path);
  const fileSize = stat.size;
  const range = req.headers.range;

  if (range) {
    const parts = range.replace(/bytes=/,"").split("-");
    const start = parseInt(parts[0],10);
    const end = parts[1] ? parseInt(parts[1],10) : fileSize - 1;

    const chunksize = end - start + 1;
    const head = {
      "Content-Range": `bytes ${start}-${end}/${fileSize}`,"Accept-Ranges": "bytes","Content-Length": chunksize,"Content-Type": "video/mp4",};

    res.writeHead(206,head);
    new ffmpeg(fs.createReadStream(path,{ start,end }))
      .input(WATERMARK_PATH)

      .complexFilter(
        "overlay='x=if(eq(mod(n\\,18)\\,0)\\,sin(random(1))*w\\,x):y=if(eq(mod(n\\,sin(random(1))*h\\,y)'",)
      .outputoptions("-movflags frag_keyframe+empty_moov")
      .toFormat("mp4")
      .pipe(res,{ end: true });
  } else {
    const head = {
      "Content-Length": fileSize,};
    res.writeHead(200,head);
    new ffmpeg(fs.createReadStream(path))
      .input(WATERMARK_PATH)
      .complexFilter(
        "overlay='x=if(eq(mod(n\\,{ end: true });
    // fs.createReadStream(path).pipe(res)
  }
});

app.listen(3020,function () {
  console.log("App is running on port 3020");
});

结果，视频无法播放，并且控制台中出现以下错误。

错误：

c:\myapp>node server.js
App is running on port 3000
events.js:292
      throw er; // Unhandled 'error' event
      ^

Error: Output stream closed
    at Timeout._onTimeout (c:\myapp\node_modules\fluent-ffmpeg\lib\processor.js:491:25)
    at listOnTimeout (internal/timers.js:549:17)
    at processtimers (internal/timers.js:492:7)
Emitted 'error' event on FfmpegCommand instance at:
    at emitEnd (c:\myapp\node_modules\fluent-ffmpeg\lib\processor.js:424:16)
    at Timeout._onTimeout (c:\myapp\node_modules\fluent-ffmpeg\lib\processor.js:491:17)
    at listOnTimeout (internal/timers.js:549:17)
    at processtimers (internal/timers.js:492:7)

如果您删除标题分配并联系服务器，我们将下载视频，即FFMPEG有效，并添加了水印。 问：如何设置视频播放？