Optimizing a Complex Video Editing Page with Flutter and Redux

Although building a video‑editing page with Flutter presents challenges, after multiple optimizations its performance on mainstream devices can match that of a native implementation, while benefiting from Flutter’s cross‑platform consistency and rapid development.

The page exhibits five major complexities: intricate state management, technical data alignment across platforms, sophisticated logic for speed adjustments, a UI with multiple timelines, and high performance demands during preview playback.

To avoid native development hurdles, the team chose pure Flutter with Redux for global state handling, enabling decoupled widget updates and preventing tight coupling that would arise from traditional UI splitting.

Two primary states were created: VideoEditorState (holding the VideoProjectWrapper with project metadata) and VideoEditorPageState (tracking over 40 transient UI states such as selectedKey , movingKey , currentVideoTimeUnit , etc.). Redux’s global AppState drives widget rebuilding only when relevant properties change.

Time handling distinguishes between user‑perceived time and SDK‑internal time using VideoEditorUserTimeRange and VideoEditorSDKTimeRange , providing conversion methods to keep both timelines synchronized despite speed changes.

For UI rendering, a Stack approach replaces list‑based rendering, allowing each item to compute its own offset and width based on start time and duration, eliminating dependence on neighboring items and improving reuse.

Performance improvements include minimizing unnecessary rebuilds by separating Redux‑driven builds from setState builds, caching video thumbnails via platform‑specific FFI on Android and Channel on iOS, and optimizing frame rates by isolating high‑frequency states like CurrentTime to the smallest possible widget set.

In conclusion, developing a Flutter‑based video editing page is feasible; after two months of effort the solution delivers near‑native performance, demonstrating Flutter’s advantage in handling complex, high‑performance mobile UI scenarios.