Media Converter Pro: Ultimate

Convert video and audio right on your device with FFmpeg. No uploads, no servers.

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• 25 output formats (14 audio, 11 video), with format-specific options
• Quick presets, trimming with waveform preview, batch queues
• Conversions keep running in the background
• Adaptive layouts for phones, tablets, foldables and large screens
• 12 languages

This is a Flutter rewrite of the original native Android app, Android-Media-Converter, built in 2018 with Khang Nguyen.

Project structure

A Dart workspace monorepo:

• apps/mcu: the app
• apps/mcu_configs: CLI that validates the FFmpeg configs and translations
• modules/converter: the converter feature (job maker, job manager, settings)
• packages/: shared packages, including the design system (sofluffy_ui, a git submodule), the platform layer (FFmpegKit, notifications, files), storage, ads and translations (l10n)

Getting started

You need Flutter 3.47+ (Dart 3.13+). The project pins its Flutter version with puro in .puro.json.

git clone --recurse-submodules <this repo>
cd converter
flutter pub get

cd apps/mcu
flutter run

If you cloned without --recurse-submodules, run git submodule update --init first.

Configuration (optional)

Everything builds out of the box. Without .assets/env.props:

• the app ID is io.sofluffy.mcu
• release builds are signed with the debug key
• ads use Google's sample ad units

To sign release builds or use real AdMob IDs, copy .assets/env.props.example to .assets/env.props and fill it in. It's gitignored.

Checks

./run_tests.sh      # unit and widget tests across the workspace
./validate.sh       # FFmpeg config schemas and translation parity
./test_ffmpeg.sh    # runs the FFmpeg commands for real

Code conventions are in CONVENTIONS.md, and FFmpeg config rules are in CONFIG_RULES.md.

License

GPL-3.0. The app bundles the GPL build of FFmpeg through FFmpegKit.