---
title: Caption Burner V3
emoji: 🔥
colorFrom: yellow
colorTo: red
sdk: docker
pinned: false
app_port: 7860
---

# Async V3: Caption Burner

This backend adds **server-side subtitle burning** using FFmpeg + ASS.

## 🚀 Upgrade Instructions
1.  Go to your HF Space > Files.
2.  Delete old files.
3.  Upload ALL files from `huggingface-backend/async_v3_captions`:
    *   `app.py`
    *   `styles.py`
    *   `ass_generator.py`
    *   `Dockerfile`
    *   `requirements.txt`
4.  Wait for rebuild.

## ✨ Features
*   **Transparent Layers**: Generates a `.webm` video with alpha channel (no background).
*   **Manual Transcript**: Client allows you to paste JSON transcript.
*   **Styles**: Hormozi, Netflix, Neon.

## 🚀 Upgrade Instructions
1.  Go to your HF Space > Files.
2.  Upload `app.py` (logic change).
3.  Upload `client-v3.html` (UI change).
4.  Upload `Dockerfile` (No change, but good to be safe if you missed font update).