graph TD A[Raw Transcription Input] --> B[Task 1: Initial Analysis] V[Video Duration] --> B T[Tutorial Title] --> B B -- potential_steps_list --> C[Task 2: Step Selection] C -- refined_six_steps --> D[Task 3: Timestamp Processing] D -- formatted_steps_with_timestamps --> E[Task 4: JSON Construction] T --> E E --> F[Final JSON Output] subgraph Content Analysis B end subgraph Step Refinement C end subgraph Format and Structure D E end style A fill:#f9f,stroke:#333 style F fill:#9ff,stroke:#333 style B fill:#dfd style C fill:#dfd style D fill:#dfd style E fill:#dfd