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Fast Media Processing with AI Captions: Enhance Your Videos Effortlessly

June 2026 FFMPEG API Team

In the age of digital content, video engagement is crucial. Adding captions not only makes your videos more accessible but can also increase viewer retention. With FFMPEGAPI.net, you can effortlessly add TikTok-style captions to your videos using our AI Captions API. This hosted REST API simplifies the process, allowing developers to integrate powerful video processing capabilities without the need for server management.

Why Choose FFMPEGAPI.net for Video Processing?

FFMPEGAPI.net is a hosted REST API designed specifically for video and audio processing. By eliminating the need for server setup and FFmpeg infrastructure management, it allows developers to focus on building and scaling their applications.

Our API-key authentication ensures secure and streamlined workflows for developers, making it an ideal choice for automation, SaaS applications, content pipelines, and AI agents.

  • No server setup required
  • API-key authentication for security
  • Supports automation and SaaS integrations
  • Fast and scalable media processing

Utilizing the AI Captions Endpoint

The AI Captions endpoint allows you to transcribe video audio and render stylized captions directly into your video. This is particularly useful for platforms like TikTok, where engaging content is key.

To get started, you simply need to send a POST request to the endpoint /api/videos/add-tiktok-captions with the necessary parameters.

  • Transcribes video audio with word timestamps
  • Renders styled captions into the video
  • Returns caption artifact URLs when available
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'

payload = {
    'video_url': 'https://example.com/video.mp4',
    'subtitle_style': 'yellow-bg',
    'position': 'bottom'
}

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

Parameters for Customizing Captions

FFMPEGAPI.net's AI Captions API allows for several customizable parameters to meet your specific needs. Here are the key parameters you can use:

Customize the appearance and behavior of the captions by adjusting options like subtitle style, language, aspect ratio, and more.

  • video_url (required): URL of the video to process
  • subtitle_style (optional): Choose from styles like plain-white, yellow-bg, and more
  • language (optional): Specify the language or use 'auto' for automatic detection
  • aspect_ratio (optional): Set to 16:9, 9:16, 4:3, or 3:4
  • max_chars_per_line (optional): Limit caption length, defaults to 20
  • max_lines (optional): Control the number of caption lines, from 1 to 4
  • position (optional): Set caption position to top, center, or bottom

In conclusion, FFMPEGAPI.net provides a seamless solution for developers looking to enhance their video content with AI-generated captions. With the AI Captions endpoint, you can quickly integrate engaging TikTok-style captions into your videos, boosting accessibility and viewer engagement. By utilizing our hosted REST API, you can streamline your content pipeline without the complexities of maintaining FFmpeg infrastructure. Start enhancing your videos today with FFMPEGAPI.net!

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