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Upload clips taken throughout an event
Video Editor

🎬 TrailMixer – AI-Powered Trailer Generator

🚀 Inspiration

Movie directors, advertisers, and creators like Hack the 6ix need fast, high-quality videos to promote and recap their products/events. TrailMixer automates the video-making process using AI.

⚙️ What It Does

Upload batches of raw (messy) video content
Specify video duration and music style
AI picks the most meaningful clips out of the batch
Stitches the clips together and adds matching music based on sentiment analysis to create a polished trailer
Similar to iMovie, the user can continue to edit with a built-in video editor by moving around media files, shrinking and expanding them with ease.

🛠️ Tech Stack

Frontend: React, TypeScript, ShadCN Backend: Python, FastAPI APIs:

TwelveLabs – video analysis via prompt engineering
FFmpeg – stitching video and music

⚡ Challenges

Prompt engineering: No strict output format — solved with embedded JSON examples
FFmpeg quirks: Unstable Python wrappers required manual debugging
API limits: TwelveLabs rate-limited to 50 requests — used multiple keys and shared docs to manage -Building from scratch This is some of our members' first hackathon, and we managed to build an AI pipeline and video editor from the ground up.

✅ What We're Proud Of

Learned new tools like TwelveLabs and FFmpeg
Built a full-stack AI-powered app and understood the whole process (https://miro.com/app/board/uXjVJcA7HWY=/?share_link_id=914689440504)
Completing our project while hitting up all the workshops, touching grass, and exploring YorkU