Use Golang and FFmpeg to add video watermarks

Title: Using Golang and FFmpeg to add video watermark

In modern society, video has become an essential part of people's lives. In order to protect their copyright and improve the quality of their videos, many people choose to add watermarks to their videos. This article will introduce how to use Golang and FFmpeg to add video watermarks, and demonstrate the implementation process through specific code examples.

First, we need to install Golang and FFmpeg. Golang is a programming language that can be used to develop efficient and reliable software. FFmpeg is an open source multimedia framework for processing audio and video.

1. Installing Golang
   First, visit Golang’s official website (https://golang.org/), download the corresponding installation program according to the operating system, and install it.

2. Install FFmpeg
   Method 1: Install through the package manager
   For Linux systems, you can use the package manager to install FFmpeg directly. For example, use the apt-get command:

   sudo apt-get install ffmpeg

   Method 2: Manual compilation and installation
   For Windows and other systems, FFmpeg can be installed through source code compilation. The specific steps are as follows:

   • Visit FFmpeg’s official website (https://www.ffmpeg.org/) to download the latest source code.
   • Extract the source code and enter the unzipped folder.

   • Execute the following command to compile and install:

     ./configure
     make
     sudo make install

3. Create Golang project
   Execute the following command in the command line to create a New Golang project:

   mkdir video-watermark
   cd video-watermark
   go mod init github.com/your-username/video-watermark

4. Writing code
   Create a file named main.go, open it with a text editor, and write the following code:

package main

import (
    "log"
    "os/exec"
)

func main() {
    inputVideo := "input.mp4"
    outputVideo := "output.mp4"
    watermark := "watermark.png"
    
    cmd := exec.Command("ffmpeg",
        "-i", inputVideo,
        "-i", watermark,
        "-filter_complex", "overlay=W-w-10:H-h-10",
        outputVideo)
    
    err := cmd.Run()
    if err != nil {
        log.Fatal(err)
    }
    
    log.Println("Watermark added successfully!")
}

In the code, we specify the paths of the input video file, output video file and watermark image. Then, we use FFmpeg’s command line tool to operate. When executing the command, we add the watermark by specifying the input file, watermark file and filter complexity. Finally, we check the execution results of the command and output the corresponding log information.

5. Run the code
   Execute the following command in the project root directory to compile and run the code:

   go run main.go

   After execution, we will get a watermarked Output video files.

Through the above steps, we have successfully used Golang and FFmpeg to add video watermarks. Use Golang to easily write code and leverage the power of FFmpeg for video processing. I hope this article will help you in the process of adding video watermarks.

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