Guide to converting audio files to HLS format using fluent-ffmpeg in Node.js

For my project, I utilized the following code snippet:

ffmpeg.setFfprobePath(ffprobeBin.path);
ffmpeg.setFfmpegPath(ffmpegPath);
ffmpeg(audioPath, {timeout: 432000})
    .audioCodec('aac')
    .audioBitrate('128k')
    .outputOptions(['-hls_time 10', '-hls_list_size 0'])
    .format('hls')
    .output(`${folderPath}/${streamName}`).on('end', () => {
  console.log(`Finished processed ${streamName} for video Id:  ${folderName}`);

  Audio.findByIdAndUpdate(nameFile.split('.')[0], {
    streamUrl: streamName
  }

Unfortunately, this setup is not working as expected with my mp3 audio file. It seems that the issue may be related to the presence of images or copyright within the mp3 file.

I have also experimented with other audio codecs such as aac and libmp3lame, but the problem persists.

node.jsaudioffmpegmp3fluent-ffmpeg

Answer №1

Choose option map 0-a to select specific sound from the audio file;

ffmpeg(audioPath, {timeout: 432000}).addOptions([
            '-map 0:a',
            '-c:a aac',
            '-b:a 128k',
            '-f hls',
            '-hls_time 10',
            '-hls_list_size 0'
          ])

Answer №2

When dealing with multiple streams, it's important to be aware that the hls encoder may not always automatically select the audio stream. To ensure the correct stream is chosen, consider using the -map option to designate the desired audio stream.

Insert the following line of code after the audioBitrate method:

.addOptions(['-map 0:a'])

Please note: There aren't any specific functions for -map and other stream-related tasks like those found in ffmpeg cli. That's why we rely on the outputOptions method.

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