Video Inpainting

Video inpainting is the task of filling missing or masked regions in video frames while preserving spatial realism and temporal continuity - it combines reconstruction, motion alignment, and context reasoning to synthesize plausible content over time.

What Is Video Inpainting?

• Definition: Recover unknown regions in each frame using visible context from both space and time.
• Mask Sources: Object removal, corruption, dropped blocks, or manual edits.
• Core Difficulty: Fill regions must be consistent across frames under motion.
• Model Families: Flow-guided propagation, transformer completion, and diffusion-based inpainting.

Why Video Inpainting Matters

• Content Editing: Removes unwanted elements for media post-production.
• Restoration: Repairs damaged archival footage.
• Privacy Use Cases: Supports redaction workflows with coherent background reconstruction.
• Temporal Challenge: Requires avoiding flicker and motion discontinuities.
• Creative Tools: Enables object substitution and scene manipulation.

Inpainting Pipeline

Temporal Propagation:
- Copy valid background cues from nearby frames where region is visible.
- Use flow or learned correspondence for alignment.

Hole Synthesis:
- Generate content for persistently missing areas.
- Use context-aware networks to maintain texture and structure.

Temporal Refinement:
- Enforce frame-to-frame coherence with consistency losses.
- Suppress flicker and boundary artifacts.

How It Works

Step 1:
- Track masked regions over time and propagate available context into holes.

Step 2:
- Synthesize unresolved regions and refine sequence with temporal coherence constraints.

Video inpainting is the temporal reconstruction engine that makes masked regions disappear without breaking motion realism - high-quality results require both strong spatial synthesis and stable cross-frame consistency.