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flac-stream-tagger

v1.0.9

Published

Pure JavaScript FLAC Tag writer and reader.

Downloads

18

Readme

flac-stream-tagger

Pure JavaScript FLAC Tag writer and reader. Improved from flac-tagger to have native stream support and better memory handling for large files.

Installation

npm install flac-stream-tagger

Usage

Read

import { FlacStreamTagger } from "flac-stream-tagger";
import { createReadStream } from "fs";
import { readFile } from "fs/promises";

// Create read stream from file (can use any readable stream does not have to be a file)
const readStream = createReadStream("input.flac");

// Pipe any Readable stream into tagger
const tagger = readStream.pipe(new FlacStreamTagger());
// or from buffer
const tagger = FlacStreamTagger.fromBuffer(await readFile("input.flac"));

Print Tags

// Read tags
const tags = await tagger.tags();
console.log(tags);

// Read raw metadata blocks
const blocks = await tagger.metaBlocks();
console.log(blocks);

// read tag by vorbis comment name (case-insensitive)
const { title, artist, album } = tags.tagMap;
// read cover image
const coverBuffer = tags.picture?.buffer;

Write

import { FlacStreamTagger } from "flac-stream-tagger";
import { readFile } from "fs/promises";

const flacTags: FlacTags = {
	// write vorbis comments (names are case-insensitive)
	tagMap: {
		// single value
		title: "song title",
		// multiple values
		artist: ["artist A", "artist B"],
		album: "album name",
	},
	// (optional) cover image
	picture: {
		buffer: await readFile("coverImage.jpg"),
	},
};

// Some input stream see Read example
const inputStream: Readable;

// Pipe any Readable stream into tagger
const tagger = inputStream.pipe(new FlacStreamTagger(tags));
// or from buffer
const tagger = FlacStreamTagger.fromBuffer(inputBuffer, tags);

// Pipe tagger into any Writable stream
tagger.pipe(createWriteStream("output.flac"));
// or get the buffer
cosnt buffer = await tagger.toBuffer();

Specification