I've been trying to use this library in a Google Cloud Function environment. I had a bunch of wave files stored in Google Cloud Storage and I load them into the tmp directory.

Concat (3) - /tmp/aedfa598.wav,/tmp/acde2b3f.wav,/tmp/752b43db.wav

When I pass the array of three filenames into the audioconcat function, the function does execute as expected. However, the output, which I upload from tmp to Cloud Storage, only seems to handle the first file. The subsequent ones are ignored. The output file is the same size and length of my original file.

I don't know if this is an issue with wave files in particular, with the Cloud Functions environment, or perhaps an outdated library. Could you clarify how I may be able to debug this in greater detail?

async function concatAudio(concats: string[], finalFile: string) {
    return new Promise((res, rej) => {
      console.log(`Concat (${concats.length}) - ${concats.join(',')}`)
      audioconcat(concats).concat(finalFile)
      .on('start', () => { console.log('Starting final concat of', finalFile) })
      .on('error', (err: string) => { rej(err) })
      .on('end', (output: string) => {
        console.log('Finished final concat of', finalFile);
        res(finalFile)
      })
    })
  }

This function logs everything as expected and I do reach the end and the promise resolves. However this finalFile is only the first file I pass in.

I've been working on an Electron project and am using fluent-ffmpeg. I need to be able to create an output file that is x number of copies of a loop file. I'm able to accomplish what I need in the Mac version but Windows is killing me. Searching for an alternative way to tap into ffmpeg to accomplish this in Windows.

I was hoping I could do something like this...

ffmpeg -i "concat:audio-1.mp3|audio-1.mp3" -acodec copy out.mp3

... and let it concat the input file on to itself. On the command line it results in the original file length so it's ignoring anything that refers back to itself. Is there a way using audioconcat to accomplish this?

What I'm currently doing using fluent-ffmpeg is:

// variables declared earlier in the script
proc.videoFilter('-lavfi');
if(process.platform == 'win32') {
  proc.videoFilter(`amovie=${audioFile}:aloop=${data.numLoops}`);
} else {
  proc.addOption('-filter_complex', `amovie=${data.filepath}:loop=${data.numLoops}`);
}

Like I said, it works on Mac but not in Windows. It doesn't throw an error, just copies the input file to the output file. Using...

proc.addOption('-filter_complex', `amovie=${data.filepath}:loop=${data.numLoops}`);

...causes an error in Windows.

The example is not working at all

I received the following error when trying to concat 2 files:
Input #0, matroska,webm, from 'concat:60b87d7632e1c624fcd09ce1.mp3|60b87d7932e1c624fcd09ce3.mp3':
Metadata:
encoder : Chrome
Duration: N/A, start: 0.000000, bitrate: N/A
Stream #0:0(eng): Audio: opus, 48000 Hz, mono, fltp (default)
[mp3 @ 0000025dbb9f5780] Invalid audio stream. Exactly one MP3 audio stream is required.
Could not write header for output file #0 (incorrect codec parameters ?): Invalid argument
Stream mapping:
Stream #0:0 -> #0:0 (copy)
Last message repeated 1 times

Hi @h2non , the example in the docs seems to contain errors.

var videoshow = require('audioconcat')

var songs = [
  'beatles.mp3',
  'greenday.mp3',
  'u2.mp3'
]

audioconcat(songs)
  .output('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)
  });

1. audioconcat is undefined - I think this is just a typo on the first line.
2. the method output is not available, when I took a look at the code I noticed that the output is checked for in the options.

Hi. Is there any limit on number of files being combined?
I usually get E2BIG error when combining 100 files using SOX and I am looking to combine thousands of audio files in one go. Appreciate your help.

A cross-origin error was thrown.

Tried to use this plugin in React Native , but its shows error in node_modules that ffmpeg file is not available

The readme does not adequately explain how to install ffmpeg.

Hi,
the currently released version of [email protected] on npm uses lodash.merge@^3.0.0, which is marked by npm audit as possible high security risk. I have seen, you already updated the package.json with the new version of lodash.merge, which is fine with npm audit.
It would be nice, if you could release a new version of audioconcat, to get rid of this warning.

Thank you in advance!

I have 2 audio files: audio1.ogg and audio2.ogg and then I run

audioconcat(songArr)
    .concat(storyName + '.ogg')
    .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)
      res.send({message: "Error"});
    })
    .on('end', function (output) {
      console.error('Audio created in:', output)
      makeVid(body, res);
    })

songArr has both audios in there and in the log I can see

ffmpeg process started: ffmpeg -i concat:audio1.ogg|audio2.ogg -y -acodec copy storyName.ogg

However when I play the finished audio, the second audio has been cut in half from about 16 seconds to just 8.

audioconcat version: ^0.1.3
node version: 6.10.2
npm version: 3.10.10
ffmpeg version 3.4.1

this is my code :
` var audioconcat = require("audioconcat");

var songs = ["mp3/0.mp3", "mp3/1.mp3", "mp3/2.mp3"];

audioconcat(songs)
.concat("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);
}); this is the error: ffmpeg stderr: ffmpeg version N-100082-g81503ac58a Copyright (c) 2000-2020 the FFmpeg developers
built with gcc 9.3-win32 (GCC) 20200320
configuration: --prefix=/ffbuild/prefix --pkg-config-flags=--static --pkg-config=pkg-config --cross-prefix=x86_64-w64-mingw32- --arch=x86_64 --target-os=mingw32 --enable-gpl --enable-version3 --disable-debug --disable-w32threads --enable-pthreads --enable-iconv --enable-zlib --enable-libxml2 --enable-libfreetype --enable-libfribidi --enable-gmp --enable-lzma --enable-fontconfig --enable-opencl --enable-libvmaf --disable-vulkan --enable-libvorbis --enable-amf --enable-libaom --enable-avisynth --enable-libdav1d --enable-libdavs2 --enable-ffnvcodec --enable-cuda-llvm --disable-libglslang --enable-libass --enable-libbluray --enable-libmp3lame --enable-libopus --enable-libtheora --enable-libvpx --enable-libwebp --enable-libmfx --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-librav1e --enable-librubberband --enable-schannel --enable-sdl2 --enable-libsoxr --enable-libsrt --enable-libsvtav1 --enable-libtwolame --enable-libuavs3d --enable-libvidstab --enable-libx264 --enable-libx265 --enable-libxavs2 --enable-libxvid --enable-libzimg --extra-cflags=-DLIBTWOLAME_STATIC --extra-cxxflags= --extra-ldflags=-pthread --extra-libs=-lgomp
libavutil 56. 61.100 / 56. 61.100
libavcodec 58.114.100 / 58.114.100
libavformat 58. 64.100 / 58. 64.100
libavdevice 58. 11.103 / 58. 11.103
libavfilter 7. 91.100 / 7. 91.100
libswscale 5. 8.100 / 5. 8.100
libswresample 3. 8.100 / 3. 8.100
libpostproc 55. 8.100 / 55. 8.100
Guessed Channel Layout for Input Stream #0.0 : mono
Input #0, wav, from 'concat:0.mp3|mp3/1.mp3|mp3/2.mp3':
Duration: 00:00:04.87, bitrate: 835 kb/s
Stream #0:0: Audio: pcm_s16le ([1][0][0][0] / 0x0001), 22050 Hz, mono, s16, 352 kb/s
[mp3 @ 00000258a936be00] Invalid audio stream. Exactly one MP3 audio stream is required.
Could not write header for output file #0 (incorrect codec parameters ?): Invalid argument
Error initializing output stream 0:0 --
Stream mapping:
Stream #0:0 -> #0:0 (copy)
Last message repeated 1 times i already changed mp3/0.mp3 to -> ./mp3/0.mp3 and /mp3/0.mp3 . I also moved the file and tried 0.mp3 `. Still the same error.
thx for any help