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Adding Subtitles to Videos with FFMPEGAPI.net: A Developer's Guide

June 2026 FFMPEG API Team

Adding subtitles to videos can enhance accessibility and improve user experience. With FFMPEGAPI.net, developers can easily integrate subtitle functionality into their applications without the hassle of server management or complex FFmpeg setups. This article will guide you through the process of using the 'Add Subtitles' API endpoint to burn ASS subtitles into a video.

Overview of FFMPEGAPI.net

FFMPEGAPI.net is a powerful hosted REST API that allows developers to harness the capabilities of FFmpeg for video and audio processing tasks. It simplifies the integration of multimedia functionalities into web applications, making it an ideal solution for developers looking for a cloud FFmpeg alternative.

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

Using the 'Add Subtitles' API Endpoint

The 'Add Subtitles' endpoint allows you to burn ASS/SSA subtitles directly into your video files. This process is essential for providing accessible content and enhancing viewer engagement.

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

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

response = requests.post(url, json=data, headers=headers)
print(response.json())
curl -X POST https://www.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"}'

API Parameters

When making a request to the 'Add Subtitles' endpoint, you will need to provide several parameters.

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

FFMPEGAPI.net provides developers with a straightforward and efficient solution for adding subtitles to videos through its hosted API. With no need for server management and a simple API interface, it stands out as the best cloud FFmpeg alternative for developers looking to enhance their multimedia applications. Start integrating subtitle functionality today to elevate your video content.

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