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Effortless Subtitle Integration in Video with FFMPEGAPI.net

June 2026 FFMPEG API Team

Adding subtitles to videos can enhance accessibility and improve viewer engagement. With FFMPEGAPI.net, developers can seamlessly integrate subtitles using a simple API call, without the hassle of server management or complex setups. In this article, we'll explore how to use the Add Subtitles feature of FFMPEGAPI.net to burn ASS subtitles directly into your videos.

What is FFMPEGAPI.net?

FFMPEGAPI.net is a hosted REST API that simplifies video and audio processing using the powerful FFmpeg library. Its primary goal is to eliminate the need for developers to manage server infrastructure while providing a robust video editing toolkit.

  • No server setup or FFmpeg infrastructure management required.
  • API-key authentication for secure developer workflows.
  • Perfect for automation, SaaS applications, content pipelines, and AI agents.

Using the Add Subtitles Endpoint

The Add Subtitles endpoint allows developers to burn ASS/SSA subtitles directly into a video. This process not only enhances the video's accessibility for diverse audiences but also ensures that the subtitles remain embedded in the video file, making it easier to share across different platforms.

  • Endpoint Path: /api/add_subtitles
  • HTTP Method: POST
  • Burns subtitles from a specified ASS/SSA file into the output video.
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',
    'async': False
}

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", "async": false}'

Parameters for the Add Subtitles API

To successfully use the Add Subtitles endpoint, you need to provide several parameters. These parameters ensure that the API can accurately process your request and deliver the desired output.

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

FFMPEGAPI.net stands out as the best solution for developers seeking a hassle-free way to add subtitles to videos programmatically. Its hosted nature means no server management is required, allowing you to focus on building features rather than maintaining infrastructure. With easy-to-use API endpoints like Add Subtitles, you can enhance your projects with powerful video editing capabilities while ensuring a smooth development experience.

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