diff --git a/coolq/bot.go b/coolq/bot.go
index 979bfa3..267b054 100644
--- a/coolq/bot.go
+++ b/coolq/bot.go
@@ -5,7 +5,6 @@ import (
 	"encoding/gob"
 	"fmt"
 	"hash/crc32"
-	"math/rand"
 	"os"
 	"path"
 	"runtime/debug"
@@ -126,6 +125,24 @@ func (bot *CQBot) UploadLocalImageAsGroup(groupCode int64, img *LocalImageElemen
 	return bot.Client.UploadGroupImageByFile(groupCode, img.File)
 }
 
+func (bot *CQBot) UploadLocalVideo(target int64, v *LocalVideoElement) (*message.ShortVideoElement, error) {
+	if v.File != "" {
+		video, err := os.Open(v.File)
+		if err != nil {
+			return nil, err
+		}
+		defer video.Close()
+		// todo 加缓存上传失败:短视频上传失败: resp is empty 迷
+		/*
+			hash1, _ := utils.ComputeMd5AndLength(video)
+			hash2, _ := utils.ComputeMd5AndLength(v.thumb)
+			cacheFile := path.Join(global.CACHE_PATH, hex.EncodeToString(hash1[:])+hex.EncodeToString(hash2[:])+".video")
+		*/
+		return bot.Client.UploadGroupShortVideo(target, video, v.thumb)
+	}
+	return &v.ShortVideoElement, nil
+}
+
 func (bot *CQBot) UploadLocalImageAsPrivate(userId int64, img *LocalImageElement) (*message.FriendImageElement, error) {
 	if img.Stream != nil {
 		return bot.Client.UploadPrivateImage(userId, img.Stream)
@@ -160,8 +177,8 @@ func (bot *CQBot) SendGroupMessage(groupId int64, m *message.SendingMessage) int
 			newElem = append(newElem, gv)
 			continue
 		}
-		if i, ok := elem.(*LocalVideoElement); ok { // todo:cache & multiThread
-			gv, err := bot.Client.UploadGroupShortVideo(groupId, i.video, i.thumb)
+		if i, ok := elem.(*LocalVideoElement); ok {
+			gv, err := bot.UploadLocalVideo(groupId, i)
 			if err != nil {
 				log.Warnf("警告: 群 %v 消息短视频上传失败: %v", groupId, err)
 				continue
@@ -289,10 +306,10 @@ func (bot *CQBot) SendPrivateMessage(target int64, m *message.SendingMessage) in
 			newElem = append(newElem, fv)
 			continue
 		}
-		if i, ok := elem.(*LocalVideoElement); ok { // todo:cache & multiThread
-			gv, err := bot.Client.UploadGroupShortVideo(target, i.video, i.thumb)
+		if i, ok := elem.(*LocalVideoElement); ok {
+			gv, err := bot.UploadLocalVideo(target, i)
 			if err != nil {
-				log.Warnf("警告: 私聊 %v 消息短视频上传失败: %v", int64(rand.Uint32()), err)
+				log.Warnf("警告: 私聊 %v 消息短视频上传失败: %v", target, err)
 				continue
 			}
 			newElem = append(newElem, gv)
diff --git a/coolq/cqcode.go b/coolq/cqcode.go
index 6e3023f..cc9c2a1 100644
--- a/coolq/cqcode.go
+++ b/coolq/cqcode.go
@@ -82,7 +82,6 @@ type LocalVoiceElement struct {
 type LocalVideoElement struct {
 	message.ShortVideoElement
 	File  string
-	video io.ReadSeeker
 	thumb io.ReadSeeker
 }
 
@@ -793,26 +792,27 @@ func (bot *CQBot) ToElement(t string, d map[string]string, group bool) (m interf
 			return nil, err
 		}
 		v := file.(*LocalVideoElement)
+		var data []byte
 		if cover, ok := d["cover"]; ok {
-			data, _ := global.FindFile(cover, cache, global.IMAGE_PATH)
-			v.thumb = bytes.NewReader(data)
-		}
-		if v.thumb == nil {
+			data, _ = global.FindFile(cover, cache, global.IMAGE_PATH)
+		} else {
 			_ = global.ExtractCover(v.File, v.File+".jpg")
-			v.thumb, _ = os.Open(v.File + ".jpg")
+			data, _ = ioutil.ReadFile(v.File + ".jpg")
 		}
-		v.video, _ = os.Open(v.File)
-		_, err = v.video.Seek(4, io.SeekStart)
+		v.thumb = bytes.NewReader(data)
+		video, _ := os.Open(v.File)
+		defer video.Close()
+		_, err = video.Seek(4, io.SeekStart)
 		if err != nil {
 			return nil, err
 		}
 		var header = make([]byte, 4)
-		_, err = v.video.Read(header)
-		if !bytes.Equal(header, []byte{0x66, 0x74, 0x79, 0x70}) { // ftyp
-			_, _ = v.video.Seek(0, io.SeekStart)
-			hash, _ := utils.ComputeMd5AndLength(v.video)
+		_, err = video.Read(header)
+		if !bytes.Equal(header, []byte{0x66, 0x74, 0x79, 0x70}) { // check file header ftyp
+			_, _ = video.Seek(0, io.SeekStart)
+			hash, _ := utils.ComputeMd5AndLength(video)
 			cacheFile := path.Join(global.CACHE_PATH, hex.EncodeToString(hash[:])+".mp4")
-			if global.PathExists(cacheFile) {
+			if global.PathExists(cacheFile) && cache == "1" {
 				goto ok
 			}
 			err = global.EncodeMP4(v.File, cacheFile)
@@ -820,9 +820,8 @@ func (bot *CQBot) ToElement(t string, d map[string]string, group bool) (m interf
 				return nil, err
 			}
 		ok:
-			v.video, _ = os.Open(cacheFile)
+			v.File = cacheFile
 		}
-		_, _ = v.video.Seek(0, io.SeekStart)
 		return v, nil
 	default:
 		return nil, errors.New("unsupported cq code: " + t)
diff --git a/global/codec.go b/global/codec.go
index 26cd2dd..4f2648d 100644
--- a/global/codec.go
+++ b/global/codec.go
@@ -39,7 +39,7 @@ func EncoderSilk(data []byte) ([]byte, error) {
 	return slk, nil
 }
 
-func EncodeMP4(src string, dst string) error {
+func EncodeMP4(src string, dst string) error { //        -y 覆盖文件
 	cmd := exec.Command("ffmpeg", "-i", src, "-y", "-c", "copy", "-map", "0", dst)
 	return cmd.Run()
 }