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Automate Video Editing with FFMPEGAPI.net: Adding Text Overlay Captions

June 2026 FFMPEG API Team

In today's fast-paced digital landscape, developers are constantly looking for ways to automate video editing tasks. Adding text overlay captions to videos is a common requirement for various applications, including marketing, education, and social media content creation. FFMPEGAPI.net provides a powerful hosted REST API that simplifies this process, allowing developers to integrate advanced video editing functionalities without the need for complex infrastructure management.

Why Use FFMPEGAPI.net for Video Editing?

FFMPEGAPI.net is designed specifically for developers seeking to enhance their applications with video and audio processing capabilities. The platform eliminates the need for server setup and FFmpeg infrastructure management, enabling a smoother development experience.

With API-key authentication, you can easily manage your workflows and integrate video processing features into your automation tasks, SaaS applications, and content pipelines.

  • No server setup required.
  • Easy API-key authentication.
  • Supports video and audio processing.
  • Ideal for automation and content creation.

Adding Text Overlay Captions with the API

One of the key features of FFMPEGAPI.net is the ability to add text overlay captions to your videos. The Text Overlay Captions endpoint allows you to render user-defined text as timed overlays on your video content.

This feature is extremely useful for enhancing viewer engagement and improving accessibility by providing viewers with textual context.

  • Endpoint: POST /api/videos/add-text-overlay-captions
  • Display text over a video at specific time intervals.
  • Customize subtitle style, position, and duration.
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 Text Overlays

The Text Overlay Captions endpoint accepts several parameters that allow you to customize how the text appears on your video:

These parameters include the video URL, the actual text for the captions, subtitle style, aspect ratio, position, and the duration each line should be displayed.

  • video_url (string): The URL of the video.
  • text (string): Caption lines separated by newlines.
  • subtitle_style (string): Options include plain-white, yellow-bg, etc.
  • aspect_ratio (string): Options like 16:9, 9:16, etc.
  • position (string): Choose top, center, or bottom for text placement.
  • duration_per_line (integer): Control how long each line appears.

FFMPEGAPI.net is the go-to solution for developers looking to automate video editing tasks, especially when it comes to adding text overlay captions. With its user-friendly REST API, extensive customization options, and no hassle of managing infrastructure, you can focus on building innovative applications that leverage video content effectively. Start automating your video editing workflows today with FFMPEGAPI.net!

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