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    novalid-wav-file-info

    0.0.8 • Public • Published

    WAV File Info for Node.JS

    A lightweight module that parses WAV information data from a wav file into a Javascript Object. Basically retrieves file and header meta data information from a WAV file.

    Used for:

    • Determining the validity of a .wav file
    • Detecting the bit depth / bit rate / bits per sample of a .wav file
    • Detecting the Sample Rate of a .wav file
    • Detecting the number of channels in a .wav file
    • Retrieving the file information, including file size, created date etc

    Usage

    npm install wav-file-info --save
    
    var wavFileInfo = require('wav-file-info');
     
    wavFileInfo.infoByFilename('./test.wav', function(err, info){
      if (err) throw err;
      console.log(info);
    });

    if err is not null, the WAV file is valid.

    From the command line you can run:

    node wfi.js <filename>
    

    Result

    { header:
       { riff_head: 'RIFF',
         chunk_size: 1697504,
         wave_identifier: 'WAVE',
         fmt_identifier: 'fmt ',
         subchunk_size: 16,
         audio_format: 1,
         num_channels: 2,
         sample_rate: 44100,
         byte_rate: 45328,
         block_align: 4,
         bits_per_sample: 16,
         data_identifier: 'PAD ' },
      stats:
       { dev: 16777220,
         mode: 33184,
         nlink: 1,
         uid: 501,
         gid: 20,
         rdev: 0,
         blksize: 4096,
         ino: 71128242,
         size: 1697512,
         blocks: 3320,
         atime: Sun Nov 29 2015 10:13:15 GMT-0700 (MST),
         mtime: Sat May 23 2015 12:45:00 GMT-0600 (MDT),
         ctime: Thu Nov 12 2015 14:31:37 GMT-0700 (MST),
         birthtime: Sat May 23 2015 12:44:55 GMT-0600 (MDT)
      },
      duration: 9.623038548752834
    }
    

    Example errors

    { error: true,
      invalid_reasons:
       [ 'Expected "RIFF" string at 0',
         'Expected "WAVE" string at 4',
         'Expected "fmt " string at 8',
         'Unknwon format: 25711',
         'chunk_size does not match file size' ] }
    

    Duration is in seconds. Stats come from Node raw fs.statSync() result.

    References: http://soundfile.sapp.org/doc/WaveFormat/

    TODO: Deep scan [avg amplitude, max amplitude], fork for AIFF

    Install

    npm i novalid-wav-file-info

    DownloadsWeekly Downloads

    1

    Version

    0.0.8

    License

    ISC

    Unpacked Size

    115 kB

    Total Files

    11

    Last publish

    Collaborators

    • hrodrigues1984