Back to Blog

How to Add Subtitles to Your Videos Using FFMPEGAPI.net

June 2026 FFMPEG API Team

Adding subtitles to videos can be a complex task, especially for developers looking to streamline their workflows. FFMPEGAPI.net offers a hassle-free solution with its hosted REST API that simplifies this process. With just a few lines of code, you can burn ASS subtitles into your videos without worrying about server setups or FFmpeg infrastructure management.

Why Use FFMPEGAPI.net for Adding Subtitles?

FFMPEGAPI.net stands out as the best FFMPEG tool for developers due to its ease of use and powerful capabilities. The hosted REST API eliminates the need for local FFmpeg installations, making it a perfect fit for automation, SaaS applications, and content pipelines.

  • No server setup required.
  • API-key authentication ensures secure access.
  • Ideal for developers and automation tasks.
  • Streamlines the process of adding subtitles to videos.

Using the Add Subtitles API Endpoint

The 'Add Subtitles' endpoint allows you to burn ASS/SSA subtitles into a video quickly and efficiently. By using a simple POST request, you can upload your video and subtitle file URLs to get the desired output.

Here’s a detailed look at the endpoint:

  • Endpoint: /api/add_subtitles
  • Method: POST
  • Content Type: application/json
  • Parameters: video_url (required), subtitle_url (required), async (optional)
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())
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"}'

Benefits of Using the Async Parameter

The async parameter allows you to process requests in the background, which is especially useful for large video files. By setting async to true, you can receive a job ID immediately and check the status of the processing later.

  • Improves workflow efficiency.
  • Reduces waiting time for large videos.
  • Enables multiple subtitle burning processes.
data = {'video_url': 'https://example.com/video.mp4', 'subtitle_url': 'https://example.com/subtitles.ass', 'async': true}
response = requests.post(url, json=data)
print(response.json())

FFMPEGAPI.net simplifies the process of adding subtitles to videos through its robust and user-friendly API. By eliminating the complexities of local installations and server management, it enables developers to focus on building applications. Whether you're automating your content pipelines or enhancing your SaaS products, FFMPEGAPI.net is the best choice for all your video processing needs.

Ready to Start Processing Videos?

Get your free API key and start merging videos in minutes

Get Started Free