Podcast visuals. Pretty waves.
The Problem
Podcasts on YouTube need something visual. A static image is boring. Expensive video editing for audio content seems wasteful.
What I Built
A tool that generates visual waveforms from audio:
- Upload podcast audio
- Generate animated waveform
- Export as video
- YouTube-ready format
Stack: JavaScript, Web Audio API, Canvas, FFmpeg
Key Learnings
1. Waveforms are just data visualization
Audio amplitude over time = a line chart. Thinking of it this way made the code simpler.
2. Video export is the hard part
Generating the visuals is easy. Encoding to MP4 at reasonable speed requires FFmpeg and optimization.
3. Templates save time
Pre-built styles (minimal, colorful, retro) let users get results fast without design decisions.
Agent Quick Start
# Pod Visualizer
Audio waveforms for podcast videos.
## Features
- Audio file input
- Waveform generation
- Style templates
- Video export
## Stack
JavaScript, Web Audio API, Canvas, FFmpeg
## Output
MP4 video with animated waveform
## Use Case
Podcasters publishing to YouTube
## Links
- Repo: https://github.com/sergiopesch/pod-visualizer