graph TD A[Start VideoAssemblerPro] --> B[Input Validation] B --> C[Process Audio] B --> D[Process Avatar] C --> C1[Get MP3 Transcription] C --> C2[Convert MP3 to WAV] C1 --> C3[Timing Data] C2 --> C4[WAV File] D --> D1[Resize Avatar Image] D --> D2[Optimize Avatar] D1 --> D3[Sized Avatar] D2 --> D4[Optimized Avatar] C3 --> E[Video Generation] C4 --> E D3 --> E D4 --> E E --> F[Generate Talking Head] F --> G[Final MP4 Output] subgraph Audio Preparation C1 C2 C3 C4 end subgraph Avatar Preparation D1 D2 D3 D4 end subgraph Final Assembly E F G end