Abhishek Rajput@abhishek_rajput586

CaptionAI is an intelligent multi-agent video captioning platform that transforms any video into engaging, creative captions across multiple styles. Built on LangGraph's stateful agent orchestration framework, the system deploys a team of specialized AI agents working in parallel to deliver fast, high-quality results. How It Works: Video Ingestion – Users submit single or multiple video URLs through a bold neo-brutalist React interface built with Vite and Tailwind CSS. Agentic Pipeline – A LangGraph-powered agent graph orchestrates the workflow: Validator Agent checks URL validity and video duration (30–120 seconds). Downloader Agent fetches videos from cloud storage to local temp storage. Audio Extractor Agent uses FFmpeg to extract audio tracks (gracefully handles silent videos). Frame Extractor Agent samples keyframes every 5 seconds using FFmpeg. Transcription Agent converts speech to text via OpenAI Whisper API. Vision Analyzer Agent uses Gemini 2.5 Flash to describe visual scenes in each keyframe. Content Merger Agent combines transcript and visual descriptions into unified context. Caption Generators run in parallel using Groq's LLaMA 3.3 70B model to produce four distinct styles simultaneously: Formal (professional, grammatically correct) Sarcastic (witty, clever mockery) Humorous Tech (programming/IT humor) Humorous Non-Tech (general audience humor) Quality Checker Agent validates caption length and relevance. Results – Users receive beautifully styled caption cards with copy-to-clipboard functionality. Technical Architecture: Backend: Node.js + Express.js with LangGraph for agent orchestration, BullMQ for job queuing, FFmpeg for video processing, and Zod for request validation. AI Models: Groq (text generation), Gemini 2.5 Flash (vision), OpenAI Whisper (transcription). Frontend: React + Vite with Tailwind CSS. Deployment: Vercel serverless functions for backend API, Vercel static hosting for frontend.

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Build solutions that improve how software is built. Work with an AI that understands your codebase, helping you reduce repetitive work and build with real context. ⏳ Build your project in 48 hours. 🚀 Get hands-on with IBM Bob and explore how AI fits into real development workflows before it becomes standard. 💡 Build tools and workflows that developers would actually use. ⭐ Learn directly from experts throughout the event. 🤝 Join a team or build solo. 💰 Prize pool: $10,000 🧑🏻‍💻 Register before the Kick-Off Stream and start building with Bob.

This is your chance to push boundaries, solve real-world challenges, and create impact at the official hackathon of the RAISE Summit 2025 at one of Paris's most iconic venues: Le Carrousel du Louvre. 📅 July 4–8, 2025 — Collaborate online with a global community of innovators. 🏛️ July 8–9, 2025 — Limited on-site access to the RAISE Summit in Paris (300 participants), exclusively for selected teams. 🏆 July 9, 2025 — Winners will be announced live on stage during the RAISE Summit. 🌟 Expert mentors will guide you throughout your hackathon journey. 🤝 Work solo or build your dream team to create something extraordinary. 💰 Compete for a share of up to $150,000 in prizes. 🔒 Sign up before the Kick-Off Stream to secure your spot!

Drive efficiency, automation, and innovation by streamlining workflows and integrating seamless processes. ⏳ You have 48 hours to complete the challenge and compete for prizes. 🚀 Learn and build AI solutions with IBM Granite. 💡 Create impactful solutions that drive smarter business operations. ⭐ Gain expert guidance throughout the hackathon. 🤝 Collaborate or work solo to bring your ideas to life. 💰 $10,000 prize pool for the winners! 🧑🏻‍💻 Sign up before the Kick-Off Stream and start shaping the future with IBM Granite!