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• I'm trying to merge videos using fluent-ffmpeg, but some times it merges videos , but whenever we tries to merge videos second time it shows error

  9 janvier 2024, par Asif Mujawar

  const express =require('express')
const app = express()
const ffmpeg = require('fluent-ffmpeg')
const ffmpegPath = require('@ffmpeg-installer/ffmpeg')
const ffprobe = require('@ffprobe-installer/ffprobe')

const first = './videos/first.mp4'
const second = './videos/second.mp4'
const third = './videos/third.mp4'
const fourth = './videos/fourth.mp4'

ffmpeg.setFfprobePath(ffprobe.path)
ffmpeg.setFfmpegPath(ffmpegPath.path)

app.use(express.json())

app.use("/",(req,res)=>{
    res.send("hello")

    ffmpeg()
    .input(first)
    .input(second)
 
    .on('end', function() {
      console.log('files have been merged succesfully');
    })
    .on('error', function(err) {
      console.log('an error happened: ' + err.message);
    })
    .mergeToFile("final.mp4")
  })
  

app.listen(8800,()=>{
    console.log("backend is running 8800")
})



  


  but it shows error whenever we try to merge videos second time

  


  an error happened : ffmpeg exited with code 1 : Cannot find a matching stream for unlabeled input pad 3 on filter Parsed_concat_0

  


  an error happened : ffmpeg exited with code 1 : Cannot find a matching stream for unlabeled input pad 3 on filter Parsed_concat_0

  


• Fluent-ffmpeg : how to record a video with images coming from a websocket stream ?

  22 janvier 2020, par Igino Boffa

  Let’s say I’m trying to record a video with images coming from a webpage canvas, sent to an express server through a socket.io connection :

  //within requestAnimationFrame callback
  
  io.emit('video-stream',canvas.toDataURL('image/webp'));
  
  
  
  //within "stop recording" button onclick
  
  io.emit('video-stream-end');

  the Express server receives the event...

  const app = require('express')();
  
  const server = require('http').createServer(app);
  
  const io = require('socket.io')(server);
  
  const ffmpeg = require('fluent-ffmpeg')
  
  
  
  io.on('video-stream', (image) => { /* ffmpeg stuff to record the video*/ });
  
  io.on('video-stream-end', () => { /* ffmpeg stuff to end recording*/ });

  What should be the code in the two event listeners ?

• Issues executing ffmpeg on windows

  4 avril 2017, par Somename

  Installed ffmpeg. Added the PATH in system Environment Variables and can execute ffmpeg from anywhere in the cmd. Installed fluent-ffmpeg. Below is my script :

  var express = require('express');
  
  var bodyParser = require('body-parser');
  
  var app = express();
  
  var ffmpeg = require('fluent-ffmpeg');  
  
  
  
  var proc = new ffmpeg({ source: 'myfile.gif' })
  
    .withAspect('4:3')
  
    .withSize('640x480')
  
    .applyAutopadding(true, 'white')
  
    .saveToFile('myfile.avi', function(stdout, stderr) {
  
      console.log('file has been converted succesfully');
  
    });
  
  
  
  app.listen(3000, function() {  
  
      console.log("Server Running on 3000");
  
  });

  Getting error :
  

  

  Please help.