Tips for blurring video images using Golang and FFmpeg

Techniques of using Golang and FFmpeg to achieve blurred video images

[Introduction]
In the field of video editing, image processing is an important technology, among which image blurring It is a commonly used processing effect. This article will introduce how to use Golang and FFmpeg to achieve video blurring techniques, and provide readers with specific code examples.

[Prerequisites]
Before you start, you need to meet the following prerequisites:

1. FFmpeg has been installed on the computer and the environment variables have been configured;
2. Golang is installed and GOPATH is set.

[Implementation process]
The following are the specific steps to achieve video blurring:

1. Import the necessary packages and libraries

First, we need to import some necessary packages and libraries to handle video files and image processing:

package main

import (
    "fmt"
    "log"
    "os"
    "os/exec"
)

2. Prepare the file path of the input video and output video

We need to prepare Good input video and output video file path. In this example, we will use a video named input.mp4 as input and output to the output.mp4 file.

func main() {
    inputFile := "input.mp4"
    outputFile := "output.mp4"
}

3. Use FFmpeg command to perform video blur operation

Through Golang's exec package, we can execute the FFmpeg command line to achieve video blurring. In this example, we will use the Gaussian blur effect, and the input parameter sigma represents the value of the blur level. The following is the specific code:

func main() {
    inputFile := "input.mp4"
    outputFile := "output.mp4"

    cmd := exec.Command("ffmpeg", "-i", inputFile, "-vf", fmt.Sprintf("gblur=sigma=10"), "-c:a", "copy", outputFile)

    err := cmd.Run()
    if err != nil {
        log.Fatal(err)
    }

    fmt.Println("视频模糊处理完成！")
}

In the above code, we use the Command function of the exec package to create a command line, and then use the
Run function to execute the command line. The command line includes the following parameters:

• -i: Specifies the input video file
• -vf: Specifies the image processing effect, here is Gaussian blur (gblur), sigma value is 10
• -c:a: Specify the output audio format, here it is consistent with the input
• The last parameter is the output video file Path

4. Run the program and view the results

Save the above code to a file named blur.go and run the program. After a while, you will find a video file named output.mp4 in the same directory, in which the picture has been blurred.

[Summary]
This article introduces the techniques of using Golang and FFmpeg to achieve video blurring. By executing the FFmpeg command line, we can achieve image processing effects such as Gaussian blur. I hope this article has been helpful in understanding video processing and image processing and provided you with specific code examples. Keep learning and exploring, and you can implement more interesting video editing techniques!

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