convert-audio-to-video-mpeg/index.js

A package for converting audio files to video/MPEG format to ensure cross-platform compatibility, especially for Android, iOS, and Safari browsers.

import fs from 'fs';
import path from 'path';
import ffmpeg from 'fluent-ffmpeg';
import ffmpegPath from 'ffmpeg-static';

// Set the ffmpeg path for fluent-ffmpeg to use
ffmpeg.setFfmpegPath(ffmpegPath);

/**
 * Converts an audio file to a video format (MP4) and stores it in the specified folder.
 * @param {string} uploadPath - The directory path where the audio file and converted video will be stored.
 * @param {object} file - The uploaded audio file object (e.g., from a file upload request).
 * @returns {Promise<string>} - The path to the converted video file or an error message.
 */
const convertAudioToVideo = async (uploadPath, file) => {
    if (!file) {
        throw new Error('No file found, cannot upload.');
    }

    const fName = path.parse(file.originalname).name; // Get the file name without extension
    const videoPath = path.join(uploadPath, `${fName}.mp4`); // Define the path for the converted video

    // Ensure the uploadPath exists
    if (!fs.existsSync(uploadPath)) {
        fs.mkdirSync(uploadPath, { recursive: true });
    }

    try {
        // Convert the audio to video using ffmpeg
        await new Promise((resolve, reject) => {
            ffmpeg(file?.path)
                .output(videoPath)
                .videoCodec('libx264') // Set video codec (H.264 for MP4)
                .audioCodec('aac') // Set audio codec (AAC for MP4)
                .on('start', (commandLine) => {
                    console.log('FFmpeg command:', commandLine);  // Log the full ffmpeg command
                })
                .on('error', (err, stdout, stderr) => {
                    console.error('FFmpeg error:', err);
                    console.error('FFmpeg stdout:', stdout);
                    console.error('FFmpeg stderr:', stderr);  // Capture detailed error messages
                    reject(err);
                })
                .on('end', resolve) // Resolve once conversion is done
                .run();
        });

        console.log('Video conversion completed:', videoPath);
        return videoPath;  // Return the path to the converted video file
    } catch (error) {
        throw new Error('Error in conversion: ' + error.message);
    }
};

// CommonJS export
module.exports = { convertAudioToVideo };

// ES Module export
export { convertAudioToVideo };