Accessible Video Editor

An Android video editing application designed with accessibility as a top priority. Built for users who rely on screen readers (TalkBack, NVDA, JAWS) and keyboard navigation.

🌟 Features

Core Editing

• Cut & Trim: Precise video cutting with accessible marker controls
• Live Split Mode: Real-time video segmentation while playing
• Multi-Video Merge: Combine multiple video clips seamlessly
• Speed Control: Adjust playback speed (0.5x, 1x, 2x)
• Audio Mute: Remove audio from video clips

Audio Management

• Music Mixing: Add background music with volume controls
• Auto-Ducking: Automatically lower music when speech is detected
• Fade In/Out: Smooth audio transitions (0-10 seconds)
• Audio Extraction: Export audio as MP3/M4A
• Loop Music: Repeat background music throughout the video

Export Options

• Multiple Formats: MP4, WebM, MKV
• Quality Settings: High, Medium, Low
• Background Processing: Export operations run in the background, allowing you to use other apps or features.
• Robust Encoding: Standardized H264 (Video) and AAC (Audio) encoding for maximum compatibility.
• Fast Export: Optimized export for compatible formats
• Audio-Only Export: Extract audio without video processing

Accessibility Features

• Full TalkBack Support: Every UI element is properly labeled
• Custom TTS Engine: Choose your preferred Text-to-Speech engine (System, Google, Vocalizer, etc.) from Settings.
• Keyboard Navigation: Complete keyboard control
• Custom TalkBack Actions: Context-specific actions in video player
• Focus Mode: Hide tabs for distraction-free editing
• Haptic & Audio Feedback: Vibration and beep notifications
• Detailed Announcements: Verbose mode for screen reader users

🎯 Target Users

• Visually impaired content creators
• Screen reader users (TalkBack, NVDA, JAWS)
• Keyboard-only navigation users
• Anyone seeking an accessible video editing solution

🛠️ Technical Stack

• Language: Kotlin
• UI Framework: Jetpack Compose
• Video Processing: Media3 Transformer API
• Audio Processing: Custom processors (Fade, Ducking, Stereo)
• Architecture: MVVM with Hilt dependency injection
• Minimum SDK: 26 (Android 8.0)
• Target SDK: 34 (Android 14)

📋 Requirements

• Android 8.0 (API 26) or higher
• Recommended: Android 10+ for best performance
• Storage permission for media access

🚀 Installation

From Source

1. Clone the repository:

   git clone https://github.com/YOUR_USERNAME/AccessibleVideoEditor.git

2. Open in Android Studio (Hedgehog or later)

3. Sync Gradle and build the project

4. Run on device or emulator

APK Release

(Coming soon - check Releases page)

📖 Usage Guide

Basic Workflow

1. Select Media: Choose video or audio file from gallery
2. Edit: Use Cut/Trim or Live Split mode
3. Add Music (optional): Mix background audio
4. Export: Choose format and quality, then save

Live Split Mode

1. Open Cut/Trim tab
2. Tap "OPEN LIVE SPLIT MODE"
3. Play video and double-tap "SPLIT" to create segments
4. Review segments and mark for deletion/mute
5. Tap "Merge and Save" to finalize

Keyboard Shortcuts (TalkBack Custom Actions)

• Seek Forward/Backward: Navigate timeline
• Set Start/End Marker: Define cut points
• Play Selection: Preview selected area
• Go to Start/End: Jump to video boundaries

🎨 Accessibility Design Principles

1. Semantic HTML/Compose: Proper roles and labels
2. Logical Focus Order: Tab navigation follows visual flow
3. State Announcements: Changes are announced to screen readers
4. Error Handling: Clear, actionable error messages
5. Consistent Patterns: Predictable UI behavior

🤝 Contributing

Contributions are welcome! Please:

1. Fork the repository
2. Create a feature branch (git checkout -b feature/AmazingFeature)
3. Commit your changes (git commit -m 'Add some AmazingFeature')
4. Push to the branch (git push origin feature/AmazingFeature)
5. Open a Pull Request

Accessibility Guidelines

When contributing, please ensure:

• All UI elements have contentDescription
• Custom actions are properly labeled
• Focus management is maintained
• Test with TalkBack enabled

📝 License

This project is licensed under the MIT License - see the LICENSE file for details.

🙏 Acknowledgments

• Media3 library by Google
• Android accessibility team for TalkBack
• The blind and visually impaired community for feedback

📧 Contact

For questions, suggestions, or accessibility feedback:

• Open an issue on GitHub
• Email: [Your Email]

🗺️ Roadmap

• Video filters and effects
• Text overlay support
• Cloud storage integration
• Collaborative editing
• iOS version

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Made with ❤️ for accessibility