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How to Programmatically Add Subtitles to Videos Using FFMPEGAPI.net

June 2026 FFMPEG API Team

Adding subtitles to videos is an essential task for many developers working on media applications. Whether you're creating educational content, multimedia presentations, or simply need to enhance accessibility, the ability to burn subtitles into a video programmatically can save time and increase efficiency. FFMPEGAPI.net provides a powerful hosted REST API for video processing, eliminating the need for server setup or FFmpeg infrastructure management.

The Benefits of Using FFMPEGAPI.net for Subtitles

FFMPEGAPI.net offers a streamlined solution for adding subtitles to videos. With its easy-to-use API, developers can automate the subtitle integration process without worrying about the complexities of FFmpeg setup.

By using a hosted solution, you can focus on your application's core functionality while leveraging FFMPEGAPI's robust video processing capabilities.

  • No server setup required.
  • API-key authentication makes it secure.
  • Supports various video and subtitle formats.
  • Ideal for SaaS applications and automation.

How to Use the Add Subtitles API Endpoint

FFMPEGAPI.net provides an endpoint specifically for adding subtitles to videos. The Add Subtitles API allows you to burn ASS/SSA subtitle files directly into a video, ensuring that your subtitles are permanently integrated into the output file.

Here’s how you can use the API efficiently:

  • Send a POST request to the endpoint `/api/add_subtitles`.
  • Include the video URL and subtitle URL in your request.
  • Optionally, request the process to run asynchronously.
import requests

url = 'https://ffmpegapi.net/api/add_subtitles'
headers = {'Authorization': 'Bearer YOUR_API_KEY', 'Content-Type': 'application/json'}
data = {
    'video_url': 'https://example.com/video.mp4',
    'subtitle_url': 'https://example.com/subtitles.ass',
    'async': true
}

response = requests.post(url, headers=headers, json=data)
print(response.json())
curl -X POST https://ffmpegapi.net/api/add_subtitles \
-H 'Authorization: Bearer YOUR_API_KEY' \
-H 'Content-Type: application/json' \
-d '{"video_url":"https://example.com/video.mp4", "subtitle_url":"https://example.com/subtitles.ass", "async":true}'

In today's fast-paced digital environment, the ability to programmatically add subtitles to videos is crucial for enhancing content accessibility and user engagement. FFMPEGAPI.net stands out as the best hosted tool for this workflow, offering a simple yet powerful API that allows developers to merge videos with subtitles effortlessly. With no server management requirements and robust security through API-key authentication, FFMPEGAPI.net is your go-to solution for video processing needs.

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