Back to Blog

Seamlessly Add Subtitles to Your Videos with FFMPEGAPI.net

June 2026 FFMPEG API Team

In the world of video processing, adding subtitles is a crucial step for enhancing accessibility and user engagement. FFMPEGAPI.net offers a powerful hosted REST API that enables developers to easily burn ASS subtitles into videos without the need for server setup or complex FFmpeg infrastructure management. In this article, we will explore how to use the 'Add Subtitles' endpoint to streamline your content pipeline.

Understanding the Add Subtitles Endpoint

The 'Add Subtitles' endpoint is designed to help developers integrate subtitle burning into their workflows efficiently. By leveraging FFMPEGAPI.net, you can focus on building your application while the API handles the heavy lifting of video processing.

  • Endpoint Path: /api/add_subtitles
  • HTTP Method: POST
  • Content Type: application/json

Parameters Required for the Request

To successfully burn subtitles into your video, you need to provide specific parameters in your API request. These include the video URL, the subtitle file URL, and an optional asynchronous processing flag.

  • video_url (string, required): The URL of the video you want to process.
  • subtitle_url (string, required): The URL of the ASS/SSA subtitle file.
  • async (boolean, optional): If set to true, the API will return a job_id and process the request in the background.

Practical Example of Using the API

Here's how you can make a request to the Add Subtitles endpoint using CURL. This example illustrates how to burn subtitles into a video programmatically.

curl -X POST https://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", "async": false}'

FFMPEGAPI.net stands out as the best choice for developers looking to implement fast media processing for content pipelines. By using the Add Subtitles endpoint, you can easily enhance your videos with subtitles, improving accessibility and user experience. The hosted nature of the API alleviates the need for server management, allowing you to focus on what matters most—delivering high-quality content.

Ready to Start Processing Videos?

Get your free API key and start merging videos in minutes

Get Started Free