The network for creativity
Join 1.25M professional creatives like you
Connect with clients, get discovered, and run your business 100% commission-free
Creatives on Contra have earned over $150M and we are just getting started
Back to feedPost
## AutoCaption: AI-Powered Video Subtitling Platform
Role: Full-Stack Developer
Tech Stack: Laravel 13, React, PHP 8.4, OpenAI Whisper, FFmpeg
### Project Overview
AutoCaption is a sophisticated video editing tool designed to automate the transcription and captioning process. By integrating AI-driven speech recognition, the platform allows creators to generate, edit, and style captions in real-time, significantly reducing the manual effort required for video post-production.
### Key Features & Implementation
Multilingual AI Transcription: Utilizes OpenAI Whisper models to accurately transcribe audio into text, supporting multiple languages and regional dialects (as seen with the Hindi/Hinglish example).
Interactive Timeline Editor: Built a custom React-based timeline that allows users to precisely sync text segments with video timestamps, adjusting start and end times with drag-and-drop ease.
Dynamic Styling Engine: Developed a comprehensive styling sidebar where users can customize:
Typography: Select from a library of modern fonts (e.g., Montserrat, Roboto).
Visuals: Real-time adjustments for font size, color, background highlights, and text shadows.
Presets: Quick-apply "Modern," "Elegant," or "System" styles for brand consistency.
Video Processing Pipeline: Implemented a backend architecture using FFmpeg to handle high-resolution video rendering, ensuring that stylized captions are "burned" into the final export without quality loss.
### Technical Highlights
Real-time Preview: Engineered a seamless bridge between the React frontend and the video player to show caption changes instantly as the user edits styles.
Scalable Backend: Leveraged Laravel 13's robust job queuing system to process video rendering tasks asynchronously, maintaining a responsive user interface during heavy compute tasks
The network for creativity
Join 1.25M professional creatives like you
Connect with clients, get discovered, and run your business 100% commission-free
Creatives on Contra have earned over $150M and we are just getting started
Related posts
Created this video for a client website featuring a flying Falcon. Generated it using Gemini.
great work 👌
It was a really nice surprise to wake up today and to see this. I'm really honored by @Contra always being a place and community for creative builders! Thanks everyone for the engagement and community spirit that contributed to it!
Congratulations Bob! Not an easy feat this one.
I'm working on a 3D website project, the main scene of which will be a location with several houses and objects on the map.
I've made some sketches with GPT Image: do you think it's better to create the scene with a grass texture or on a flat surface?
3 voted
33%
6 voted
67%
9 votes
Closed
grassy
Trending
FLORA
Reusable workflows are replacing one-off prompts in creative AI. Share what you're building in FLORA.
Contra University
Learn from expert creatives how to earn more using next-gen AI tools.
creativeaiflow
Creative AI workflows are evolving. What tools do you use, and what are their strengths and weaknesses?
portfolioreview
The best portfolios tell a story, not just show a grid. Share yours for feedback.
freelancerlife
Freelancer life is wins, pivots, and everything in between. What’s yours right now?