Feat/faditor mini #185
Feat/faditor mini #185
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Summary of Changes
Hello @anonfaded, I'm Gemini Code Assist1! I'm currently reviewing this pull request and will post my feedback shortly. In the meantime, here's a summary to help you and other reviewers quickly get up to speed!
This pull request transforms the 'Faditor Mini' placeholder into a fully functional, professional-grade video editor. It introduces a robust architecture for video processing, project management, and user interface, ensuring a smooth, efficient, and reliable editing experience. The changes lay the foundation for advanced video editing features within the application.
Highlights
- Core Video Editor Implementation: The primary change is the introduction of a full-fledged video editor (
FaditorEditorFragment) replacing a placeholder. This includes video playback, timeline editing, and export capabilities, laying the foundation for advanced video editing features. - Robust Project Management: A new project management system is introduced, featuring JSON-based persistence, Room database indexing, and media reference management. This allows users to seamlessly save, load, and organize their video projects across sessions.
- Seamless Auto-Save & Recovery: A continuous auto-save mechanism (every 5 seconds) is implemented, along with crash recovery capabilities. This ensures that users' editing progress is never lost, even during unexpected app terminations or interruptions.
- Hardware-Accelerated Processing: The editor leverages OpenGL ES and MediaCodec for GPU-accelerated video processing. This enables highly efficient and performant operations such as lossless trimming and optimized re-encoding, crucial for a smooth editing experience.
- Material Design 3 Integration: The entire user interface adheres to Material Design 3 guidelines, providing a modern, consistent, and responsive user experience. This includes dynamic theming, sophisticated motion patterns, and enhanced accessibility features.
- Comprehensive Error Handling: A structured and user-friendly error handling system is implemented. It utilizes custom exceptions, provides clear messages, and suggests recovery actions to guide users through potential issues during editing and processing.
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Code Review
This is a massive and impressive pull request that introduces a comprehensive video editor feature, "Faditor Mini". The architecture is well-designed with a clear separation of concerns, and the implementation includes advanced features like hardware-accelerated processing, a professional UI, and robust persistence with auto-save and crash recovery. The code is generally clean and well-documented. I've identified a few areas for improvement, mainly a simplification in the lossless trimming logic that could lead to issues, and a bug in the export options dialog. Overall, this is a fantastic contribution to the project.
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| ## Overview | ||
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| The Faditor Mini video editor will be implemented as a comprehensive replacement for the existing placeholder FaditorMiniFragment. The design leverages the existing FFmpeg AAR dependency and follows the app's established architectural patterns, including the use of ExoPlayer for video playback, Material Design 3 theming, and modular component organization. |
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The design document mentions leveraging an FFmpeg dependency, but the implementation in OpenGLVideoProcessor seems to rely on Android's native MediaCodec, MediaExtractor, and MediaMuxer APIs for processing. While this is a great approach for performance, the documentation should be updated to reflect the actual implementation to avoid confusion.
| * Provides maximum screen space by hiding bottom navigation and using overlay container. | ||
| * Implements requirements 10.1-10.5 and 12.7 for professional editing experience. | ||
| */ | ||
| public class FaditorEditorFragment extends BaseFragment implements |
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This fragment is quite large (over 1500 lines) and handles a lot of responsibilities, acting as a central coordinator for many UI components and managers. While this is a common pattern for complex screens, consider if some of the logic could be delegated to helper classes or ViewModels to improve maintainability and reduce the complexity of the fragment itself. For example, the UI interaction logic for the various tools could potentially be extracted into their own handlers.
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| // Check if video format supports lossless trimming | ||
| return metadata.isLosslessTrimCompatible() && | ||
| isKeyFrameAligned(operation.getStartTime()) && |
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The current implementation of isKeyFrameAligned assumes a fixed keyframe interval, which might not be true for all videos. This could lead to the lossless trim feature failing or producing corrupted videos if the trim points are not on actual keyframes. For a more robust implementation, you should parse the video's sample flags (MediaExtractor.getSampleFlags()) to identify BUFFER_FLAG_KEY_FRAME and determine the actual keyframe positions.
- Added comprehensive logging to MediaReferenceManager for better debugging. - Implemented a new method to check if a URI requires re-selection due to permission issues. - Introduced a dialog for users to re-select URIs that have expired permissions. - Updated ProjectManager to handle project loading with validation and URI re-selection. - Enhanced ProjectSerializer to support URI serialization and deserialization. - Created VideoDebugUtils for comprehensive video diagnostics and device capability checks. - Updated ProjectDatabase to store the database in external storage. - Added new layout for URI re-selection dialog and corresponding strings in resources.
Updates project creation to leverage the professional media management system for importing and managing video assets. This change replaces the previous URI-based approach with a more robust and scalable media management solution, improving project organization and media handling. It also removes legacy media handling code.
``` This commit makes several improvements to video playback and timeline synchronization: - Use view lifecycle owner for LiveData observation to prevent leaks - Add debouncing for smooth timeline scrubbing - Ensure proper video initialization state by seeking to position 0 - Improve timeline-video position synchronization - Remove duplicate observer registration in onResume - Fix video player state management and initial frame display ``` The key changes are: 1. Using getViewLifecycleOwner() instead of 'this' for LiveData observation to prevent memory leaks and duplicate observers 2. Adding debouncing logic in TimelineComponent to smooth out scrubbing updates and reduce video player thrashing 3. Properly initializing the video player state by seeking to position 0 and displaying the first frame on load 4. Improving coordination between timeline and video player position updates 5. Removing redundant loadProjects() call from onResume since LiveData already handles UI updates The commit message is concise but captures the main functional changes while hinting at the motivating issues (synchronization, initialization, leaks). I kept it focused on the what rather than the how, since the implementation details are best left to the code and comments.
The changes implement a professional-grade scrubbing system similar to DaVinci Resolve and Premiere Pro, using cached frames during scrubbing for ultra-smooth visual feedback without constantly seeking the video. Key improvements: - Cache frames during scrubbing instead of doing expensive video seeks - Single high-quality seek only when scrubbing ends - Predictive frame caching in scrub direction - Frame interpolation for smoother motion - Reduced logging noise during playback - Proper synchronization and feedback loop prevention
The commit improves performance by reducing logging verbosity and streamlining performance tracking code. Key changes: - Reduced frequency of timeline position logging - Removed redundant log messages from video seeking flow - Optimized viewport update logic to prevent feedback loops - Added checks to avoid unnecessary position updates - Improved performance monitor log frequency The changes reduce system overhead from excessive logging while maintaining essential diagnostic capabilities.
The commit adds position update throttling and validation to prevent timing-related glitches in video playback. It improves sync between the video player, timeline, and UI controls while handling stale updates and large position jumps more gracefully.
- Implement video/audio tracks with thumbnails and waveform - Add mute and cover buttons to timeline sidebar - Draw fixed center playhead and update time display - Add new drawables for timeline backgrounds and playhead - Refactor TimelineComponent for multi-track and thumbnail support
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