How do I use the modeules ffmpeg and ffprobe correctly? I have issues with the mp3 files.

[l1k2j3h4g5]

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Question

In the readme it says:

 -x, --extract-audio         Convert video files to audio-only files
                             (**requires ffmpeg or avconv and ffprobe or
                             avprobe**)

So I included that at the top of my node.js file:

const ffmpeg = require('ffmpeg');
const ffprobe = require('ffprobe');

In terminal I ran

$ npm install ffmpeg -save
$ npm install ffprobe -save

which gave me a package json file of:

"dependencies": {
   "ffmpeg": "0.0.4",
   "ffprobe": "^1.1.0",
   "youtube-dl": "1.13.1"
 },

My function that then downloads the file as mp3 and uploads it to S3 is:

exports.handler = function(event, context, cb) {   
  if (!event.videoUrl) {
    return cb(new Error('videoUrl missing in event'));
  }
  const s3 = new AWS.S3({apiVersion: '2006-03-01'});
  const passtrough = new stream.PassThrough();

  var downloadOptions = ['--extract-audio', '--audio-format', 'mp3']

  const dl = youtubedl(event.videoUrl, downloadOptions, {maxBuffer: Infinity});
  dl.once('error', (err) => {
    cb(err);
  });
  const key = `${context.awsRequestId}.mp3`;
  const upload = new AWS.S3.ManagedUpload({
    params: {
      Bucket: process.env.BUCKET_NAME,
      Key: key,
      Body: passtrough
    },
    partSize: 1024 * 1024 * 64 // in bytes
  });

  upload.on('httpUploadProgress', (progress) => {
    console.log(`[${event.videoUrl}] copying video ...`, progress);
  });

  upload.send((err) => {
    if (err) {
      cb(err);
    } else {
      cb(null, {
        bucketName: process.env.BUCKET_NAME,
        key,
        url: `s3://${process.env.BUCKET_NAME}/${key}`
      });
    }
  })
  

  dl.pipe(passtrough);
}

It downloads the file and saved it as .mp3 as expected.

So how do I know there is an issue?

Every time I try to use that file in an AWS Transcribe Job it says:

The media format provided does not match the detected media format.

and when I download the file and try to run it in VLC or iTunes it forces the player to close and does not play.

Do I need to do anything else to get the encoding correct?

[dstftw]

Wrong forum.

[l1k2j3h4g5]

is this the "question" section for the module "Youtube-dl" ?

[dstftw]

No, youtube-dl has nothing to do with nodejs modules.