Back to Blog

Automate Video Captions for AI with FFMPEGAPI.net

June 2026 FFMPEG API Team

As video content continues to dominate online platforms, the demand for automated tools that enhance video accessibility is growing. FFMPEGAPI.net offers a simple yet powerful hosted REST API that enables developers to automate video captioning processes effortlessly. In this article, we will explore how to use the AI Captions endpoint to add TikTok-style captions to your videos, making it an ideal solution for AI agents and content creators.

What is the AI Captions Endpoint?

The AI Captions endpoint at FFMPEGAPI.net allows developers to transcribe audio from videos and render styled captions in a TikTok-friendly format. This powerful feature extracts audio, generates captions with timestamps, and even provides URLs for caption artifacts when available.

  • Transcribes video audio accurately.
  • Returns styled captions suitable for TikTok.
  • Offers customizable options for caption appearance.

How to Use the AI Captions Endpoint

To use the AI Captions endpoint, developers need to send a POST request to /api/videos/add-tiktok-captions. The request requires a video URL and allows for customization of various parameters to suit specific needs.

  • Video URL: The source of the video to process.
  • Subtitle Style: Choose from options like plain-white, yellow-bg, etc.
  • Language: Specify the language code or set it to auto.
  • Aspect Ratio: Define the video display aspect ratio.
  • Max Characters per Line: Control the caption wrapping limit.
  • Max Lines: Set the maximum number of caption lines.
  • Position: Define where the captions appear on the video.
curl -X POST https://www.ffmpegapi.net/api/videos/add-tiktok-captions \
-H "Content-Type: application/json" \
-d '{"video_url":"https://example.com/video.mp4", "subtitle_style":"yellow-bg", "position":"bottom"}'
import requests

url = 'https://www.ffmpegapi.net/api/videos/add-tiktok-captions'
data = {
    'video_url': 'https://example.com/video.mp4',
    'subtitle_style': 'yellow-bg',
    'position': 'bottom'
}

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

FFMPEGAPI.net stands out as the premier hosted tool for automating video captioning, particularly for AI agents looking to enhance their content. With features like easy integration, robust API key authentication, and no need for server management, FFMPEGAPI.net allows developers to focus on what they do best—creating exceptional video experiences. Start utilizing the AI Captions endpoint today and elevate your video content with automated captions.

Ready to Start Processing Videos?

Get your free API key and start merging videos in minutes

Get Started Free