Tips for using Golang and FFmpeg to implement video and picture splicing

Techniques of using Golang and FFmpeg to implement video and picture splicing

Introduction:
With the development of the Internet and mobile terminals, the importance of video content is increasing day by day. When making videos, sometimes you need to splice multiple video clips or pictures to achieve richer visual effects. This article will introduce how to use Golang and FFmpeg to implement video and picture splicing techniques, and give specific code examples.

1. Install FFmpeg
Before we start, we first need to install FFmpeg, because it is an open source multimedia framework that can provide audio and video processing functions. We can install FFmpeg through the following command:

$ brew install ffmpeg

Here we are using the Mac system. If it is other systems, please refer to the FFmpeg official documentation for installation.

2. Video splicing
Let’s take a look at how to use Golang and FFmpeg to implement video splicing. First, we need to implement a function that receives an array of file paths of video clips and splices multiple video clips into one video.

package main

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

func ConcatVideos(inputFiles []string, outputFile string) error {
    args := []string{"-y"}
    for _, file := range inputFiles {
        args = append(args, "-i", file)
    }

    args = append(args, "-filter_complex", fmt.Sprintf("concat=n=%d:v=1:a=0", len(inputFiles)))
    args = append(args, "-c:v", "copy", outputFile)

    cmd := exec.Command("ffmpeg", args...)
    if err := cmd.Run(); err != nil {
        return err
    }

    return nil
}

func main() {
    inputFiles := []string{"video1.mp4", "video2.mp4", "video3.mp4"}
    outputFile := "output.mp4"

    err := ConcatVideos(inputFiles, outputFile)
    if err != nil {
        fmt.Println("Failed to concat videos:", err)
        return
    }

    fmt.Println("Videos concatenated successfully!")
}

In the above code, we define a ConcatVideos function, which receives an array of file paths of video clips inputFiles and splices multiple video clips into A video. We called the ffmpeg command on the command line and passed in the corresponding parameters to implement video splicing.

3. Picture stitching
In addition to video stitching, sometimes we also need to stitch multiple pictures to achieve better visual effects. The following is a sample code that shows how to use Golang and FFmpeg to implement image splicing.

package main

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

func ConcatImages(inputFiles []string, outputFile string) error {
    args := []string{"-y"}
    for _, file := range inputFiles {
        args = append(args, "-loop", "1", "-y", "-i", file)
    }

    args = append(args, "-filter_complex", fmt.Sprintf("concat=n=%d:v=1:a=0", len(inputFiles)))
    args = append(args, outputFile)

    cmd := exec.Command("ffmpeg", args...)
    if err := cmd.Run(); err != nil {
        return err
    }

    return nil
}

func main() {
    inputFiles := []string{"image1.png", "image2.png", "image3.png"}
    outputFile := "output.png"

    err := ConcatImages(inputFiles, outputFile)
    if err != nil {
        fmt.Println("Failed to concat images:", err)
        return
    }

    fmt.Println("Images concatenated successfully!")
}

In the above code, we define a ConcatImages function, which receives an array of image file paths inputFiles and splices multiple images into one image. We also called the ffmpeg command on the command line and passed in the corresponding parameters to implement image splicing.

Conclusion:
This article introduces how to use Golang and FFmpeg to implement video and picture splicing techniques. We implement the splicing of videos and pictures by writing corresponding functions and calling the ffmpeg command. Through these techniques, we can process multimedia content more flexibly and achieve better visual effects. Hope this article is helpful to you!

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