Golang and FFmpeg: How to implement audio format conversion and merging

Golang and FFmpeg: How to implement audio format conversion and merging, specific code examples are required

FFmpeg is a powerful audio and video processing tool that can convert and process and edit multiple audio and video formats. Golang is a powerful programming language with concise syntax and efficient concurrency mechanism. This article will introduce how to use Golang and FFmpeg to realize the function of audio format conversion and merging, and give specific code examples.

First, we need to call the FFmpeg command line tool in Golang. Through Golang's os/exec package, we can easily execute and interact with external commands. The following is a sample code that demonstrates how to use Golang to call FFmpeg to perform audio format conversion commands:

package main

import (
    "fmt"
    "os/exec"
)

func main() {
    cmd := exec.Command("ffmpeg", "-i", "input.mp3", "output.wav")
    err := cmd.Run()
    if err != nil {
        fmt.Println("转换失败：", err)
        return
    }

    fmt.Println("转换成功！")
}

In the above code, we use the Command function of the exec package to create a command object cmd, specifying what needs to be executed The command is "ffmpeg -i input.mp3 output.wav", where input.mp3 is the audio file to be converted, and output.wav is the audio file generated after conversion.

Next, we can use Golang’s file operation function to merge audio files. The following is a sample code that demonstrates how to merge multiple audio files into one file:

package main

import (
    "fmt"
    "io"
    "os"
)

func mergeAudios(outputFile string, inputFiles ...string) error {
    output, err := os.Create(outputFile)
    if err != nil {
        return err
    }
    defer output.Close()

    for _, inputFile := range inputFiles {
        input, err := os.Open(inputFile)
        if err != nil {
            return err
        }
        defer input.Close()

        _, err = io.Copy(output, input)
        if err != nil {
            return err
        }
    }

    return nil
}

func main() {
    err := mergeAudios("output.mp3", "input1.mp3", "input2.mp3", "input3.mp3")
    if err != nil {
        fmt.Println("合并失败：", err)
        return
    }

    fmt.Println("合并成功！")
}

In the above code, we define a mergeAudios function that receives an output file name and multiple input file names as parameters , copies the contents of multiple input files into one output file. Use the Create function of the os package to create the output file, use the Open function of the os package to open the input file, and use the Copy function of the io package to copy the contents of the input file to the output file.

The above is the sample code for using Golang to call FFmpeg to convert and merge audio formats. Through the above examples, we can easily use FFmpeg in Golang for audio processing and format conversion tasks to achieve more complex functions. Hope this article is helpful to you!

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