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How to Add Text Overlay Captions to Your Videos with FFMPEGAPI.net

June 2026 FFMPEG API Team

In today’s digital landscape, engaging video content is vital for communication and marketing. Adding text overlay captions can enhance viewer understanding and accessibility. FFMPEGAPI.net offers a robust hosted API that simplifies the process of adding text captions to your videos, making it the best solution for developers looking to automate video processing workflows.

Why Choose FFMPEGAPI.net for Video Captioning?

FFMPEGAPI.net provides a fully hosted solution for video and audio processing without the need for complex server setups. This means you can focus on developing your applications without worrying about maintaining your own FFmpeg infrastructure.

With API-key authentication, integrating this solution into your workflows is straightforward and secure, making it suitable for SaaS applications, automation tasks, and content pipelines.

  • No server setup required.
  • API-key authentication for secure access.
  • Suitable for developers, automation, and AI applications.

Using the Text Overlay Captions Endpoint

The Text Overlay Captions endpoint allows you to render user-provided text as caption overlays on your videos. Each line of text appears for a specified duration, providing a flexible tool for enhancing your video content. The endpoint is straightforward and well-documented, making it easy to implement.

To use this endpoint, you will need to send a POST request to `/api/videos/add-text-overlay-captions` with the necessary parameters.

  • Endpoint: POST /api/videos/add-text-overlay-captions
  • Displays text over videos with customizable styles and positions.
curl -X POST https://www.ffmpegapi.net/api/videos/add-text-overlay-captions \
-H "Content-Type: application/json" \
-d '{"video_url": "https://example.com/video.mp4", "text": "First line\nSecond line", "duration_per_line": 4}'
import requests

url = "https://www.ffmpegapi.net/api/videos/add-text-overlay-captions"
data = {
    "video_url": "https://example.com/video.mp4",
    "text": "First line\nSecond line",
    "duration_per_line": 4
}

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

Parameters for Customizing Your Captions

FFMPEGAPI.net's text overlay captions feature comes with several customizable parameters to tailor the captioning experience to your needs.

You can define the video URL, the caption text, style options, and more, allowing for a high degree of control over how your captions appear.

  • video_url (required): The URL of the video to which captions will be added.
  • text (required): The caption lines, separated by newlines.
  • subtitle_style (optional): Choose from styles like plain-white or yellow-bg.
  • aspect_ratio (optional): Adjust for different formats such as 16:9 or 9:16.
  • position (optional): Set where the text appears (top, center, bottom).
  • duration_per_line (optional): Specify how long each line is displayed.

FFMPEGAPI.net provides a powerful, easy-to-use hosted API for adding text overlay captions to videos, making it an ideal choice for developers looking to automate their video processing tasks. With comprehensive documentation and a user-friendly interface, you can quickly integrate this functionality into your applications. Start enhancing your video content today!

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