Tips for audio noise reduction using Golang and FFmpeg

Techniques for audio noise reduction using Golang and FFmpeg

Audio processing is an important task in the field of digital signal processing, in which noise reduction is a very common requirement. This article will introduce how to use Golang and FFmpeg libraries to achieve audio noise reduction, and provide specific code examples.

1. Install Golang and FFmpeg libraries
   First, make sure you have installed Golang and FFmpeg libraries. You can download Golang from the official website and install the FFmpeg library using the following command:

   $ sudo apt-get install ffmpeg

2. Import the required Golang library
   Use the following code to import the required Golang library:

   package main
   
   import (
    "log"
    "os"
    "os/exec"
   )

3. Implement audio noise reduction function
   The following is an example of a simple audio noise reduction function:

   func denoise(inputFile string, outputFile string) error {
    cmd := exec.Command("ffmpeg", "-i", inputFile, "-af", "arnndn=denoise-audio=on", "-c:a", "pcm_s16le", outputFile)
    err := cmd.Run()
    if err != nil {
        return err
    }
    return nil
   }

   In this function, we use the FFmpeg library arnndn filter to perform audio noise reduction operation. Parameter denoise-audio=on means turning on the noise reduction function, -c:a pcm_s16le means encoding the output audio into 16-bit signed PCM format.

4. Calling the audio noise reduction function
   You can call the audio noise reduction function in the main function and pass the paths of the input and output files:

   func main() {
    inputFile := "input.wav"
    outputFile := "output.wav"
   
    err := denoise(inputFile, outputFile)
    if err != nil {
        log.Fatal(err)
    }
   
    log.Println("Audio denoise complete.")
   }

5. Run the test
   Put the input audio file (such as input.wav) in the same directory, and then run the program:

   $ go run main.go

   The program will output the noise-reduced audio file (output.wav ).

Summary
This article introduces how to use Golang and FFmpeg libraries to implement audio noise reduction techniques, and achieve noise reduction by calling FFmpeg's arnndn filter. You can modify the parameters in the function according to actual needs to further optimize the noise reduction effect. Hope this article is helpful to you!

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