Audio Format Converter

A React Native application for converting audio files between different formats using FFmpeg.

Features

• Cross-platform: Works on both iOS and Android
• Multiple formats: Supports MP3, WAV, FLAC, OGG, AAC, M4A
• Local file access: Browse and convert audio files stored on your device
• Progress tracking: Real-time conversion progress with visual feedback
• Quality settings: Configure bitrate, sample rate, and channels
• Clean UI: Simple and intuitive user interface

Supported Conversions

Input Formats

• MP3 (.mp3)
• WAV (.wav)
• FLAC (.flac)
• OGG (.ogg)
• AAC (.aac)
• M4A (.m4a)
• WMA (.wma)

Output Formats

• MP3 (.mp3)
• WAV (.wav)
• AAC (.aac)
• M4A (.m4a)

Installation

Prerequisites

• Node.js >= 18
• React Native development environment set up
• Android Studio (for Android)
• Xcode (for iOS)

Install Dependencies

npm install

iOS Setup

cd ios && pod install

Android Setup

No additional setup required, but ensure you have:

• Android SDK >= 21
• Android NDK configured

Usage

1. Launch the app
2. Select audio file: Tap "Browse Files" to choose an audio file from your device
3. Choose output format: Select MP3, WAV, AAC, or M4A
4. Convert: Tap "Convert to [format]" to start conversion
5. Wait: View progress as the file is converted
6. Save: Converted files are saved to:
   • Android: /storage/emulated/0/Android/data/com.temp/files/AudioConverter/Output/
   • iOS: /Documents/AudioConverter/Output/

Technical Details

Dependencies

• FFmpeg: Audio processing via ffmpeg-kit-react-native
• File System: File operations via react-native-fs
• Document Picker: File selection via @react-native-documents/picker
• Progress: Visual progress via react-native-progress

Permissions

Android

• READ_EXTERNAL_STORAGE
• WRITE_EXTERNAL_STORAGE
• MANAGE_EXTERNAL_STORAGE (for Android 11+)

iOS

• NSPhotoLibraryUsageDescription
• NSPhotoLibraryAddUsageDescription
• NSAppleMusicUsageDescription
• NSDocumentsFolderUsageDescription

Development

Running the App

Android

npx react-native run-android

iOS

npx react-native run-ios

Testing

npm test

Linting

npm run lint

Troubleshooting

Common Issues

1. Permission denied on Android: Ensure storage permissions are granted
2. FFmpeg not found: Check that ffmpeg-kit-react-native is properly linked
3. iOS file access: Ensure all required permissions are added to Info.plist
4. Large files: Consider using lower bitrate settings for large audio files

Android 11+ Storage Access

For Android 11 and above, you may need to:

1. Enable "Allow management of all files" in app settings
2. Or use scoped storage approach

License

MIT License - feel free to use and modify as needed.