audiox-processor/index.js

AudioX: Transform Any Inspiration Into Professional Audio With AI - Audio processing utilities for the AudioX platform

const { spawn } = require('child_process');
const path = require('path');
const fs = require('fs');
const os = require('os');

// Create temporary directory for processing
const TEMP_DIR = fs.mkdtempSync(path.join(os.tmpdir(), 'audiox-'));

/**
 * Extract audio from a video file
 * @param {string} videoPath - Path to the input video file
 * @param {string} outputPath - Path to save the extracted audio
 * @returns {Promise<string>} - Path to the extracted audio file
 */
function extractAudio(videoPath, outputPath) {
  return new Promise((resolve, reject) => {
    const args = [
      '-i', videoPath,
      '-vn', '-acodec', 'pcm_s16le',
      '-ar', '44100', '-ac', '2',
      outputPath, '-y'
    ];
    
    const ffmpeg = spawn('ffmpeg', args);
    
    ffmpeg.on('close', (code) => {
      if (code === 0) {
        resolve(outputPath);
      } else {
        reject(new Error(`FFmpeg process exited with code ${code}`));
      }
    });
    
    ffmpeg.stderr.on('data', (data) => {
      console.log(`ffmpeg: ${data}`);
    });
  });
}

/**
 * Remove audio from a video file
 * @param {string} videoPath - Path to the input video file
 * @param {string} outputPath - Path to save the video without audio
 * @returns {Promise<string>} - Path to the video file without audio
 */
function removeAudio(videoPath, outputPath) {
  return new Promise((resolve, reject) => {
    const args = [
      '-i', videoPath,
      '-c', 'copy', '-an',
      outputPath, '-y'
    ];
    
    const ffmpeg = spawn('ffmpeg', args);
    
    ffmpeg.on('close', (code) => {
      if (code === 0) {
        resolve(outputPath);
      } else {
        reject(new Error(`FFmpeg process exited with code ${code}`));
      }
    });
    
    ffmpeg.stderr.on('data', (data) => {
      console.log(`ffmpeg: ${data}`);
    });
  });
}

/**
 * Add audio to a video file
 * @param {string} videoPath - Path to the input video file
 * @param {string} audioPath - Path to the audio file to add
 * @param {string} outputPath - Path to save the combined video
 * @returns {Promise<string>} - Path to the combined video file
 */
function addAudioToVideo(videoPath, audioPath, outputPath) {
  return new Promise((resolve, reject) => {
    const args = [
      '-i', videoPath,
      '-i', audioPath, '-map', '0:v',
      '-map', '1:a', '-c:v', 'copy',
      '-shortest', outputPath, '-y'
    ];
    
    const ffmpeg = spawn('ffmpeg', args);
    
    ffmpeg.on('close', (code) => {
      if (code === 0) {
        resolve(outputPath);
      } else {
        reject(new Error(`FFmpeg process exited with code ${code}`));
      }
    });
    
    ffmpeg.stderr.on('data', (data) => {
      console.log(`ffmpeg: ${data}`);
    });
  });
}

/**
 * Reverse an audio file
 * @param {string} audioPath - Path to the input audio file
 * @param {string} outputPath - Path to save the reversed audio
 * @returns {Promise<string>} - Path to the reversed audio file
 */
function reverseAudio(audioPath, outputPath) {
  return new Promise((resolve, reject) => {
    const args = [
      '-i', audioPath,
      '-af', 'areverse',
      outputPath, '-y'
    ];
    
    const ffmpeg = spawn('ffmpeg', args);
    
    ffmpeg.on('close', (code) => {
      if (code === 0) {
        resolve(outputPath);
      } else {
        reject(new Error(`FFmpeg process exited with code ${code}`));
      }
    });
    
    ffmpeg.stderr.on('data', (data) => {
      console.log(`ffmpeg: ${data}`);
    });
  });
}

module.exports = {
  extractAudio,
  removeAudio,
  addAudioToVideo,
  reverseAudio,
  TEMP_DIR
};