audio-to-text-node/dist/core/transcriber.js

Backend audio file to text transcription using Web Speech API with Puppeteer

import { launchRecognizer } from './puppeteer';
import { setupAudioRouting, restoreAudioRouting } from './routing';
import { removeAudioDirectory, splitAudioToChunks } from './audio';
/**
 * Transcribes an audio file to text using the browser's speech recognition capabilities.
 * It splits the audio file into chunks, sets up audio routing, and launches a browser to perform the transcription.
 * @param filePath Path to the audio file to transcribe
 * @param options Transcription options
 * @returns A Promise that resolves to the transcribed text
 */
export async function transcribeFromFile(
/**
 * Audio file formats supported: https://ffmpeg.org/general.html#File-Formats
 */
filePath, options) {
    const chunkLength = 5; // seconds
    const files = splitAudioToChunks(filePath, chunkLength);
    const language = options?.language || 'en-US';
    setupAudioRouting(options?.speakerDevice, options?.microphoneDevice);
    // Ensure restore audio routing and remove audio directory and exit
    process.on('SIGINT', () => process.exit());
    process.on('SIGTERM', () => process.exit());
    process.on('exit', () => {
        removeAudioDirectory(filePath);
        restoreAudioRouting();
    });
    const text = await launchRecognizer(files, language, options?.executablePath);
    return text;
}
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