How to get the duration of an mp3 file in Golang?

Question

I set up a text to speech an request that to openAI API then it generates an audio. Now I want to know it's duration in [MM:SS], is there a way or a library to get it?

Answer 1

This question is answered here:

How to find the length of mp3 file in golang?

Also, you would want to transform a float64 in MM:SS format. In this case you can use something like this:

package main

import (
    "fmt"
    "io"
    "os"
    "time"

    "github.com/tcolgate/mp3"
)

const mp3File = <path-to-mp3-file>

func main() {
    var t float64

    fd, err := os.Open(mp3File)
    if err != nil {
        panic(err)
    }
    defer fd.Close()

    d := mp3.NewDecoder(fd)
    var f mp3.Frame
    skipped := 0

    for {

        if err := d.Decode(&f, &skipped); err != nil {
            if err == io.EOF {
                break
            }
            fmt.Println(err)
            return
        }

        t = t + f.Duration().Seconds()
    }

    fmt.Println(t)

    // Convert the value to a time.Duration object
    duration := time.Duration(t * float64(time.Second))

    // Get the duration in minutes and seconds
    minutes := int(duration.Minutes())
    seconds := int(duration.Seconds()) - (minutes * 60)

    // Format the duration in the MM:SS format
    formatted_duration := fmt.Sprintf("%02d:%02d", minutes, seconds)

    fmt.Printf("The value %v expressed in MM:SS format is %v.\n", t, formatted_duration)
}