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• Using custom decoder inside ffmpeg

  14 août 2016, par gsk

  I have a custom decoder developed using HEVC HM software. I want to use this decoder in place of the ffmpeg decoder when using ffmplay. Is it possible to directly integrate my decoder as an executable file (a linux executable) inside the ffmpeg code ?
  Thank you.

• 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

• Ffmpeg Showfreqs with Custom Frequency Ranges, Is It Possible ?

  17 février 2023, par lonewolvian

  I need to display showfreqs with 32 or 64 bands, but with custom frequency ranges, just like an old equalizer indicator.

  


  In this case, win_size is not what I want because the frequency distribution doesn't look balanced where the treble section is too wide and the bass section is to narrow.

  


  Is it possible ? If so then how to do it ?

  


  I've looked at showfreqs documentation but I didn't find any clue about this.

  


  Thank you.