How to get duration of mp3 file in Golang?

Getting the duration of mp3 files in Golang is a common requirement. PHP editor Xiaoxin will introduce you to a simple and effective method. First, we need to use a third-party library to process mp3 files. It is recommended to use the go-audio library, which provides some convenient functions. Next, we need to use the Decoder function of the go-audio library to decode the mp3 file. Then, we can get the duration of the mp3 file by calling the Decoder's Duration method. Finally, we will get a duration value in nanoseconds, which we can convert to a more friendly format, like seconds or minutes. This is how to get mp3 file duration in Golang. Hope this helps!

Question content

I set up a text-to-speech request that asks the openAI API to then generate audio. Now I want to know its duration in [MM:SS], is there any way or library to get it?

Solution

This question is answered here:

How to find the length of mp3 file golang?

Additionally, you may want to convert float64 to 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)
}

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