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For all your async streaming MP3 encoding/decoding needs, there's node-lame
!
This module hooks into libmp3lame, the library that the lame
command uses, to
provide Encoder
and Decoder
streams to NodeJS.
node-lame
comes bundled with its own copy of libmp3lame
and libmpg123
, so
there's no need to have them installed on your system.
Simply compile and install node-lame
using npm
:
$ npm install @flat/lame
Here's an example of using @flat/node-lame
to encode some raw PCM data coming from
process.stdin
to an MP3 file that gets piped to process.stdout
:
var lame = require('@flat/lame');
// create the Encoder instance
var encoder = new lame.Encoder({
// input
channels: 2, // 2 channels (left and right)
bitDepth: 16, // 16-bit samples
sampleRate: 44100, // 44,100 Hz sample rate
// output
bitRate: 128,
outSampleRate: 22050,
mode: lame.STEREO // STEREO (default), JOINTSTEREO, DUALCHANNEL or MONO
});
// raw PCM data from stdin gets piped into the encoder
process.stdin.pipe(encoder);
// the generated MP3 file gets piped to stdout
encoder.pipe(process.stdout);
See the examples
directory for some more example code.
The Decoder
class is a Stream
subclass that accepts MP3 data written to it,
and outputs raw PCM data. It also emits a "format"
event when the format of
the MP3 file is determined (usually right at the beginning).
The Encoder
class is a Stream
subclass that accepts raw PCM data written to
it, and outputs a valid MP3 file. You must specify the PCM data format when
creating the encoder instance. Only 16-bit signed samples are currently
supported (rescale before passing to the encoder if necessary)...
FAQs
NodeJS native bindings to libmp3lame & libmpg123.
The npm package @flat/lame receives a total of 97 weekly downloads. As such, @flat/lame popularity was classified as not popular.
We found that @flat/lame demonstrated a healthy version release cadence and project activity because the last version was released less than a year ago. It has 2 open source maintainers collaborating on the project.
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