先按照ffmpeg的安装攻略，搞定你CentOS上的ffmpeg，我目前使用的版本是3.0.2

package mainimport (    "fmt"    "log"    "os"    "os/exec"    "time")func main() {    var srcFileName, outputfilename string    log.SetFlags(log.Lshortfile | log.Ldate | log.Ltime)    if len(os.Args) != 3 {        fmt.Println("简单的转码服务，利用FFMPEG和编码器转换成MP4.")        fmt.Println("使用：[输入文件路径] [输出文件路径]")        os.Exit(1)    } else {        srcFileName = os.Args[1]        outputfilename = os.Args[2]    }    param := "ffmpeg -y -i " + srcFileName + " -metadata:s:v rotate=0  -vf fps=15,setdar=dar=1 -s 480x480 -pix_fmt yuv420p -strict -2 -c:v h264 -b:v 500k -b:a 48k -ss 0 -t 300 -threads 2 " + outputfilename + ""    fmt.Println("parm : ", param)    start := time.Now()    _, err := exec.Command("bash", "-c", param).CombinedOutput()    if err != nil {        fmt.Println("error: " + err.Error())    } else {        fmt.Println(" out file : ", outputfilename, " exec time  ", time.Now().Sub(start).Seconds())    }}

执行下：

go run main.go simple.mov simple_1.mp4