Narrating over a Video using Multimodal AI

This n8n workflow automates the process of adding AI-generated narration to videos. It starts by downloading the video via HTTP, then uses a Python code node with OpenCV to extract key frames. These frames are batched using a Loop node and fed into a multimodal LLM (e.g., GPT-4o) to generate partial narration scripts based on visual content. The partial scripts are combined into a full script, which is converted to high-quality voiceover audio using OpenAI's TTS API. Finally, the audio file is u