diff --git a/.gitignore b/.gitignore
index 31e3ac6..4b43257 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,2 +1,7 @@
 vendor/
 .idea
+config.hjson
+device.json
+codec/
+data/
+logs/
\ No newline at end of file
diff --git a/coolq/cqcode.go b/coolq/cqcode.go
index 16cd7d5..ba472ff 100644
--- a/coolq/cqcode.go
+++ b/coolq/cqcode.go
@@ -605,7 +605,6 @@ func (bot *CQBot) ToElement(t string, d map[string]string, group bool) (m interf
 			}
 		}()
 		data, err := bot.Client.GetTts(d["text"])
-		ioutil.WriteFile("tts.silk", data, 777)
 		if err != nil {
 			return nil, err
 		}
@@ -620,7 +619,7 @@ func (bot *CQBot) ToElement(t string, d map[string]string, group bool) (m interf
 			return nil, err
 		}
 		if !global.IsAMRorSILK(data) {
-			data, err = global.Encoder(data)
+			data, err = global.EncoderSilk(data)
 			if err != nil {
 				return nil, err
 			}
diff --git a/global/codec.go b/global/codec.go
index 90d51b4..346166c 100644
--- a/global/codec.go
+++ b/global/codec.go
@@ -7,6 +7,7 @@ import (
 	"github.com/Mrs4s/go-cqhttp/global/codec"
 	log "github.com/sirupsen/logrus"
 	"io/ioutil"
+	"os/exec"
 	"path"
 )
 
@@ -21,7 +22,7 @@ func InitCodec() {
 	}
 }
 
-func Encoder(data []byte) ([]byte, error) {
+func EncoderSilk(data []byte) ([]byte, error) {
 	if useSilkCodec == false {
 		return nil, errors.New("no silk encoder")
 	}
@@ -37,3 +38,13 @@ func Encoder(data []byte) ([]byte, error) {
 	}
 	return slk, nil
 }
+
+func EncodeMP4(src string, dst string) error {
+	cmd := exec.Command("ffmpeg", "-i", src, "-c", "copy", "-map", "0", dst)
+	return cmd.Run()
+}
+
+func ExtractCover(src string, dst string) error {
+	cmd := exec.Command("ffmpeg", "-i", src, "-y", "-r", "1", "-f", "image2", dst)
+	return cmd.Run()
+}