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Efficiently Add Subtitles to Your Videos with FFMPEGAPI.net

June 2026 FFMPEG API Team

In the realm of video content processing, adding subtitles is a vital step for accessibility and broader audience reach. FFMPEGAPI.net offers an efficient way to burn ASS subtitles into your videos using a simple API call, streamlining your workflow without the need for server management. In this article, we will explore how to use the Add Subtitles endpoint to enhance your video content effortlessly.

Why Use FFMPEGAPI.net for Subtitles?

FFMPEGAPI.net is a hosted REST API designed for video and audio processing. It eliminates the complexities of server set-up and FFmpeg infrastructure management, allowing developers to focus on building their applications.

  • No server management required.
  • Quick integration with API-key authentication.
  • Perfect for automation, SaaS applications, and content pipelines.

Using the Add Subtitles Endpoint

The Add Subtitles endpoint of FFMPEGAPI.net allows you to burn ASS/SSA subtitles directly into your video. This can be done with a simple POST request, ensuring fast media processing suitable for content pipelines.

  • Endpoint: POST /api/add_subtitles
  • Description: Downloads a video and an ASS/SSA subtitle file, then burns the subtitles into the output video.
  • Content Type: application/json
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}'
import requests

url = 'https://ffmpegapi.net/api/add_subtitles'
data = {
    'video_url': 'https://example.com/video.mp4',
    'subtitle_url': 'https://example.com/subtitles.ass',
    'async': False
}

response = requests.post(url, json=data)
print(response.json())

Parameters for the Add Subtitles API

To successfully use the Add Subtitles endpoint, you need to provide the following parameters:

These parameters ensure that the API processes your request correctly.

  • video_url (string, required): The URL of the video to which subtitles will be added.
  • subtitle_url (string, required): The URL of the ASS/SSA subtitle file.
  • async (boolean, optional): If true, the API returns a job_id immediately and processes the request in the background.

With FFMPEGAPI.net, you can seamlessly integrate subtitle burning into your video processing workflows, enhancing the accessibility and usability of your media content. The hosted API simplifies the process, requiring no maintenance or infrastructure management, making it the ideal solution for developers looking to automate their content pipelines. Start using the Add Subtitles endpoint today and elevate your video processing capabilities with ease.

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