Go?? ? ??? ?? ??? ?? ??

Golang?? os/exec ???? ? ??? ???? ??? ?????. ??? ??? ??? ??? ???? ?? ????? ???? ?? ?? ??? ???? ???? ???? ???. ?? ???? ??? ??? ????.

Go?? ? ??? ??? ??? ???? ????? ?? ?? ??? ?????.

package main</p>
<p>import (</p>
<pre class="brush:php;toolbar:false">"bufio"
"fmt"
"io"
"os"
"os/exec"
"strings"

)

func main() {

cmdName := "ffmpeg -i t.webm  -acodec aac -vcodec libx264  cmd1.mp4"
cmdArgs := strings.Fields(cmdName)

cmd := exec.Command(cmdArgs[0], cmdArgs[1:len(cmdArgs)]...)
stderr, _ := cmd.StderrPipe()
cmd.Start()
go printProgress(stderr)
cmd.Wait()

}

// stderr? ? ?? ???? ??? ??? ?????.
func printProgress(stderr io.ReadCloser) {

r := bufio.NewReader(stderr)
for {
    line, _, err := r.ReadLine()
    if err != nil {
        fmt.Println("error in reading from stderr:", err)
        break
    }

    // Process the line (e.g., extract the progress percentage)
    percentage, err := extractPercentage(string(line))
    if err != nil {
        fmt.Println("error in extracting percentage:", err)
        continue
    }

    // Print the updated progress ratio
    fmt.Printf("%s%%", percentage)
}

}

// extractPercentage? ffmpeg ?? ??? ?? ?????. ???? ?????.
// ?? ??? ?? ??? ?????(?: "frame=... size=... time=... bitrate=...")
func extractPercentage (? ???) (???, ??) {

parts := strings.Split(line, " ")
if len(parts) < 4 {
    return "", fmt.Errorf("invalid line format: %s", line)
}

size := parts[2]
sizeUnits := []string{"B", "kB", "MB", "GB", "TB", "PB"}
for i, unit := range sizeUnits {
    if strings.HasSuffix(size, unit) {
        factor := float64(1 << (10 * i))
        sizeBytes, err := strconv.ParseFloat(strings.TrimSuffix(size, unit), 64)
        if err != nil {
            return "", err
        }

        percentage := (sizeBytes / factor) / 100
        return strconv.FormatFloat(percentage, 'f', 2, 64), nil
    }
}

return "", fmt.Errorf("unknown size unit: %s", size)

}

? ?? ??? ???? ???? ?????. ??? stderr ???? ??? ?????. ????? ??? ?? ???? ?? ??? ???? ???? ?????. ? ??? extractPercentage ??? ??? ??? ?? ??? ???? ffmpeg ???? ?????? ?????. ?? ? ??? ?? ?? ??? ?? ???? ? ?? ????.

? ??? Go?? ? ??? ??? ??? ???? ???? ??? ??????? ?? ?????. ??? ??? PHP ??? ????? ?? ?? ??? ?????!