Back to Blog

How to Add Subtitles to Videos with FFMPEGAPI.net

June 2026 FFMPEG API Team

Adding subtitles to your videos can enhance accessibility and user engagement. With FFMPEGAPI.net, you can easily burn ASS subtitles into any video using our simple REST API, allowing developers to integrate this functionality seamlessly into their applications.

Why Choose FFMPEGAPI.net for Video Processing?

FFMPEGAPI.net provides a robust hosted REST API designed for video and audio processing without the need for complex server setups or FFmpeg infrastructure management.

Our API-key authentication ensures that your developer workflows remain secure and efficient, making it a perfect choice for automation, SaaS apps, content pipelines, and AI agents.

  • No server setup required
  • Quick and easy integration
  • Scalable for various applications
  • Supports multiple audio and video formats

Using the Add Subtitles Endpoint

The Add Subtitles endpoint allows you to burn ASS/SSA subtitles into videos through a simple POST request. This feature is particularly useful for creating content that needs to be accessible to diverse audiences.

To use the endpoint, you will need to provide the video URL and the subtitle file URL. You can also optionally choose to run the process asynchronously.

  • Endpoint: POST /api/add_subtitles
  • Content-Type: application/json
  • Parameters: video_url, subtitle_url, async (optional)
curl -X POST https://www.ffmpegapi.net/api/add_subtitles \
-H "Content-Type: application/json" \
-d '{"video_url": "https://example.com/video.mp4", "subtitle_url": "https://example.com/subtitles.ass"}'
import requests

url = 'https://www.ffmpegapi.net/api/add_subtitles'
data = {"video_url": "https://example.com/video.mp4", "subtitle_url": "https://example.com/subtitles.ass"}
response = requests.post(url, json=data)
print(response.json())

FFMPEGAPI.net simplifies the process of adding subtitles to videos, making it the best choice for developers looking to enhance their applications with powerful video processing capabilities. With easy-to-use endpoints and robust features, you can focus on building your application while we handle the FFmpeg processing for you.

Ready to Start Processing Videos?

Get your free API key and start merging videos in minutes

Get Started Free