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• Is there a way to stream download a mp3 file that is being converted on a nodejs server ?

  19 février 2019, par Thriskel

  I am looking for a way to send the url to the nodejs server and respond the user with the mp3 file download.

  I searched some examples, and read about requests and responses, but I am not sure what the problem really is.

  This is the Javascript for the HTML :

      var downloadBtn = document.querySelector('.download_button');
  
      var URLinput = document.querySelector('#myUrl');
  
  
  
      downloadBtn.addEventListener('click', () => {
  
          console.log(`URL: ${URLinput.value}`);
  
          sendURL(URLinput.value);
  
      });
  
  
  
      function sendURL(URL) {
  
          window.location.href = `http://localhost:4000/download?URL=${URL}`;
  
      }

  This is the Javascript for the Nodejs server :

  const express = require('express');
  
  const cors = require('cors');
  
  const ytdl = require('ytdl-core');
  
  const app = express();
  
  const ffmpeg = require('fluent-ffmpeg')
  
  app.use(cors());
  
  
  
  app.listen(4000, () => {
  
      console.log('Server Works !!! At port 4000');
  
  });
  
  
  
  app.get('/download', (req,res) => {
  
  var URL = req.query.URL;
  
  
  
  res.header('Content-Disposition', 'attachment; filename="file.mp3"');
  
  let stream = ytdl(URL, { 
  
    quality: 'highestaudio',
  
  }); //HERE THE STREAM FILE IS SELECTED TO BE CONVERTED TO MP3
  
  
  
  ffmpeg(stream)
  
    .audioBitrate(128)
  
    .pipe(res); // HERE IS CONVERTED AND WHERE I WANT IT TO SEND IT AS A DOWNLOAD TO THE USER.
  
  });

  I expected it to stream download the file but instead it gets me to the nodejs server page to /download/url_to_vid

• Add length for each frame in a MJPEG stream transcoded by ffmpeg

  8 décembre 2020, par user3612643

  I am using the following command to transcode my cam's stream into mjpeg which I decode and present in my custom home-control app :

  


  ffmpeg -i rtsp://mycamera:554/onvif1 -c:v mjpeg -f mjpeg -

  


  That works quite nicely, but the result is just a continuous sequence of jpeg images/frames. For faster decoding, I would like to have a length header before each frame, so that I can cut out the exact JPEG from the stream :

  


  LENGTH FRAME LENGTH FRAME

  


  Each LENGTH should be 4-bytes encoding in LE or BE the length of the following FRAME in bytes.

  


• /root/bin/ffmpeg : error while loading shared libraries : libtheoraenc.so.1 : cannot open shared object file : No such file or directory

  12 février 2014, par Paks

  my ffmpeg command gives error when I try to convert video format. I have installed ffmpeg manually as guided in this link https://trac.ffmpeg.org/wiki/CentosCompilationGuide. for above issue I have also checked http://unix.stackexchange.com/questions/34023/ffmpeg-error-while-loading-shared-libraries-libtheoraenc-so-1 but not able to resolve my issue.

  My command is : /root/bin/ffmpeg -i /home/pulsebrk/public_html/beta/user_uploads/6/1148a008470721f06c8dc71efa70622f99799e91.avi -acodec libvorbis -ac 2 -ab 96k -ar 44100 -b 345k -s x /home/pulsebrk/public_html/beta/user_uploads/6/1148a008470721f06c8dc71efa70622f99799e91.ogv and error is : /root/bin/ffmpeg : error while loading shared libraries : libtheoraenc.so.1 : cannot open shared object file : No such file or directory

  libtheroa version is : 1.1.1 please anyone drive me for above issue.