How to merge multiple audio files into one and encode to mp3 in NodeJs?

Question

Audio

Colleagues, good day. maybe someone will tell you, probably already something is missing. The bottom line is this, there are several mp3, aac files and a couple more audio formats at the input. you need to do 2 operations with them on Nodejs, firstly combine them into one, and secondly, convert them to mp3. Sobsna here.

In the browser, as I understand it, all this is done. Tell me if anyone has come across.

Answer 1

google towards ffmpeg

Answer 2

https://www.npmjs.com/package/fluent-ffmpeg
And an example is something like this

const mergeProc = ffmpeg()
            .on('start', () => {
              console.log('Start merging' );
            })
            .on('end', () => {
              streams.forEach(({recordPath}) => {
                fs.unlinkSync(recordPath);
              })
              console.log('Merge end. You can play ' );
            });


          audioPathArr.forEach((recordPath) => {
            mergeProc.addInput(recordPath)
          });

          mergeProc.mergeToFile(VIDEO_OUTPUT_FILE)
            .on('error', function(err) {
              console.log('Error ' + err.message);
            })
            .on('end', function() {
              console.log('Finished!');
            });