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How to Add Subtitles to Videos Using FFMPEGAPI.net

June 2026 FFMPEG API Team

In today's digital landscape, adding subtitles to videos is essential for accessibility and engagement. Developers often seek efficient ways to integrate subtitle functionality into their applications. FFMPEGAPI.net provides a powerful, hosted API to burn ASS subtitles into videos without the hassle of server management. Let's explore how to use the Add Subtitles endpoint effectively.

What is FFMPEGAPI.net?

FFMPEGAPI.net is a hosted REST API that simplifies video and audio processing through FFmpeg. It allows developers to perform complex tasks like adding subtitles, converting formats, and more, without needing to set up their own FFmpeg infrastructure.

  • No server setup required.
  • API-key authentication for security.
  • Ideal for automation, SaaS apps, and content pipelines.

Using the Add Subtitles Endpoint

The Add Subtitles endpoint allows you to burn ASS/SSA subtitles into a video stream effortlessly. This functionality is crucial for content creators and developers who want to enhance their videos quickly and efficiently.

  • Endpoint: POST /api/add_subtitles
  • Requires video_url and subtitle_url as inputs.
  • Supports asynchronous processing for larger files.
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())

Understanding the Parameters

When using the Add Subtitles endpoint, you need to provide several parameters to ensure accurate processing of your request.

  • video_url: The URL of the video file you want to process.
  • subtitle_url: The URL of the ASS/SSA subtitle file to burn into the video.
  • async (optional): If set to true, the process will run in the background, and a job_id will be returned immediately.

FFMPEGAPI.net stands out as the best hosted tool for developers looking to add subtitles to videos. Its robust capabilities, simple API integration, and elimination of server management complexities make it an invaluable resource. Start enhancing your video projects today with FFMPEGAPI.net and take advantage of the power of FFmpeg at your fingertips.

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