Audiosprite – node.js ffmpeg wrapper to concat small audio files into one

Audiosprite is a node.js ffmpeg wrapper to concat small audio files into one single file. It even allows you to define the gap between each file.

It also outputs a howler.js compliant JSON configuration file for simple copy and paste. This saves a lot of work, when using audio sprites in your web projects.

audiosprite -f howler --autoplay bg_loop --output pz ship-horn.wav

audiosprite --help
info: Usage: audiosprite [options] file1.mp3 file2.mp3 *.wav
info: Options:

  --output, -o      Name for the output files.                                   [default: "output"]

  --path, -u        Path for files to be used on final JSON.                     [default: ""]

  --export, -e      Limit exported file types. Comma separated extension list.   [default: "ogg,m4a,mp3,ac3"]

  --format, -f      Format of the output JSON file (jukebox, howler, createjs).  [default: "jukebox"]

  --log, -l         Log level (debug, info, notice, warning, error).             [default: "info"]

  --autoplay, -a    Autoplay sprite name.                                        [default: null]

  --loop            Loop sprite name, can be passed multiple times.              [default: null]

  --silence, -s     Add special "silence" track with specified duration.         [default: 0]

  --gap, -g         Silence gap between sounds (in seconds).                     [default: 1]

  --minlength, -m   Minimum sound duration (in seconds).                         [default: 0]

  --bitrate, -b     Bit rate. Works for: ac3, mp3, mp4, m4a, ogg.                [default: 128]

  --vbr, -v         VBR [0-9]. Works for: mp3. -1 disables VBR.                  [default: -1]

  --samplerate, -r  Sample rate.                                                 [default: 44100]

  --channels, -c    Number of channels (1=mono, 2=stereo).                       [default: 1]

  --rawparts, -p    Include raw slices(for Web Audio API) in specified formats.  [default: ""]

  --help, -h        Show this help message.

audiosprite