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• Create a pipeline between two programs C code [on hold]

  18 janvier 2017, par Ahmed Mkadem

  I’m using ubuntu OS, my goal is to record a video using ffmpeg and encrypt the frames recorded in paralell and in the same time, so i’m trying to avoid many calls of ffmeg and openssl, my idea is to create a pipeline between the two programs : record frames, pose them in the pipeline and encrypt them with openssl to finally record write them on disk.
  I don’t know how two start, any idea ?

• Decode audio stream channels to multiple wavs using ffmpeg ?

  18 mai 2015, par get8p

  My goal is to decode an ac3 from avi to multiple wavs - one for each channel, using ffmpeg.

  Using

  ffmpeg.exe -i the.avi -c:a copy the.ac3 the.wav

  would decode it to a single wav, and typing the.wavs won’t help...
  I know it can be done with other tools, but I want to know how it’s achievable with ffmpeg.

• Concat audio files then call create file

  11 mai 2020, par bleepbloopbleep

  I am new and am trying to concat a folder of audio files and then stream the create file with ffmpeg in node.js.

  



  I thought I could call the function that creates the file with await and then when it's done the code would continue allowing me to call the created file. However thats not whats happening. I am getting a "file undefined"

  



  Main function

  



  //CONCATS THE FILES
  await concatAudio(supportedFileTypes.supportedAudioTypes, `${path}${config[typeKey].audio_directory}`);

  // CALLS THE FILE CREATED FROM concatAudio
  const randomSong = await getRandomFileWithExtensionFromPath(
    supportedFileTypes.supportedAudioTypes,
    `${path}${config[typeKey].audio_final}`
  );


  



  concatAudio function

  



  var audioconcat = require('audioconcat');
const getRandomFileWithExtensionFromPath = require('./randomFile');
const find = require('find');

// Async Function to get a random file from a path
module.exports = async (extensions, path) => {
  // Find al of our files with the extensions
  let allFiles = [];

  extensions.forEach(extension => {
    allFiles = [...allFiles, ...find.fileSync(extension, path)];
  });

  await audioconcat(allFiles)
    .concat('./live-stream-radio/final/all.mp3')
    .on('start', function(command) {
      console.log('ffmpeg process started:', command);
    })
    .on('error', function(err, stdout, stderr) {
      console.error('Error:', err);
      console.error('ffmpeg stderr:', stderr);
    })
    .on('end', function(output) {
      console.error('Audio created in:', output);
    });

  // Return a random file

  // return '/Users/Semmes/Downloads/live-stream-radio-ffmpeg-builds/live-stream-radio/final/all.mp3';
};