Tiny media transcoding utility for node.
🏗️ This package is a work in progress.
$ npm install --save mediaplex
const mediaplex = require('mediaplex');
const stream = createReadStream('./media.mp3');
const result = mediaplex.probe(stream);
console.log(result);
/*
{
channels: 2,
sampleRate: 44100,
framesPerBlock: 0,
codec: 4099, // use `CodecType` enum to validate this
nFrames: 796032,
duration: 18 // seconds
}
*/
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Since this library was created for discord-player, the API should be similar to its current transcoder, which is a node.js stream. It works by taking raw stream, piping it to transcoder and receive the desired output.
My current idea is to implement something similar to the following:
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import { probeStream, CodecType, Transcoder } from 'mediaplex'
const stream = getInputStream();
const probeResult = await probeStream(stream);
if (!probeResult.result) return; // unsupported stream
const transcoder = new Transcoder({
format: CodecType.OPUS, // the output format
sampleRate: 48000, // output sample rate
channels: 2, // the number of channels
... // other options
}); // Transcoder extends Transform stream
const output = stream.pipe(transcoder); // output shall be Opus stream, as specified in format
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