diff --git a/plugins/Common.php b/plugins/Common.php
index cd65d46..82f2b32 100644
--- a/plugins/Common.php
+++ b/plugins/Common.php
@@ -553,7 +553,7 @@ Class Common {
 
     //从文件缓存读取数据
     //expireSeconds: 缓存失效时间，默认10分钟
-    public static function getCacheFromFile($key, $expireSeconds = 600, $cacheSubDir = '') {
+    public static function getCacheFromFile($key, $expireSeconds = 600, $cacheSubDir = '', $withCreateTime = false) {
         $cacheDir = __DIR__ . '/../runtime/cache/';
         //子目录支持
         if (!empty($cacheSubDir)) {
@@ -568,7 +568,7 @@ Class Common {
             //如果缓存没有失效
             $now = time();
             if ($now - $data['ctime'] <= $expireSeconds) {
-                return $data['data'];
+                return empty($withCreateTime) ? $data['data'] : $data;
             }else {
                 return null;
             }
diff --git a/themes/beauty/controller/SiteController.php b/themes/beauty/controller/SiteController.php
index 1ce7440..28fadb0 100644
--- a/themes/beauty/controller/SiteController.php
+++ b/themes/beauty/controller/SiteController.php
@@ -281,6 +281,13 @@ Class SiteController extends Controller {
     }
 
     //根据目录id，获取第一张图网址作为封面图返回
+    /**
+     * size可选值：
+     * original - 原图
+     * small    - 缩略图
+     * vm       - 视频封面图(vmeta)
+     * am       - 音乐封面图(ameta)
+     **/
     public function actionDirsnap() {
         $code = 1;
         $msg = 'OK';
@@ -298,13 +305,22 @@ Class SiteController extends Controller {
             $cacheKey = $this->getCacheKey($cateId, 'snap');
             $expireSeconds = FSC::$app['config']['screenshot_expire_seconds'];  //有效期3650天
             $cacheSubDir = 'dir';
-            $cachedData = Common::getCacheFromFile($cacheKey, $expireSeconds, $cacheSubDir);
+            $withCreateTime = true;     //返回数据的缓存时间
+            $cache = Common::getCacheFromFile($cacheKey, $expireSeconds, $cacheSubDir, $withCreateTime);
+            $cachedData = $cache['data'];
+            $cachedCtime = $cache['ctime'];
+            $now = time();
 
             //如果关闭缩略图
             if (empty(FSC::$app['config']['enableSmallImage']) || FSC::$app['config']['enableSmallImage'] === 'false') {
                 if (!empty($cachedData) && !empty($cachedData['size']) && $cachedData['size'] == 'small') {
                     $cachedData = null;
                 }
+            }else if ( !empty($cachedData) && !empty($cachedData['size']) && in_array($cachedData['size'], array('vm', 'am')) ) {
+                //如果是视频、音乐封面图，则缓存 10 分钟
+                if ($now - $cachedCtime > 600) {
+                    $cachedData = null;
+                }
             }
 
             //弃用老版本数据格式，抛弃没有size属性的
@@ -339,7 +355,7 @@ Class SiteController extends Controller {
                             if (!empty($cachedData)) {
                                 $url = $cachedData['snapshot'];
                                 $cacheSubDir = 'dir';
-                                $size = 'vm';
+                                $size = 'vm';   //视频封面图
                                 Common::saveCacheToFile($cacheKey, compact('url', 'size'), $cacheSubDir);
                             }
                         }else {
@@ -347,12 +363,16 @@ Class SiteController extends Controller {
                             $firstVideo = $scanner->getSnapshotImage($realpath, $audioExts);
                             if (!empty($firstVideo)) {
                                 $url = '/img/beauty/audio_icon.jpeg';
+
+                                //TODO: 获取音乐封面图
+                                //$size = 'am';     //音乐封面图
+
                             }
                         }
                     }else {
                         $url = $imgFile['path'];
                         $img_id = $imgFile['id'];
-                        $size = 'orignal';
+                        $size = 'orignal';      //原尺寸
 
                         //小尺寸图片支持
                         if (!empty(FSC::$app['config']['enableSmallImage']) && FSC::$app['config']['enableSmallImage'] !== 'false') {
@@ -362,7 +382,7 @@ Class SiteController extends Controller {
                             $cachedData = Common::getCacheFromFile($cacheKey_smimg, $expireSeconds, $cacheSubDir);
                             if (!empty($cachedData)) {      //已经有缩略图
                                 $url = $cachedData;
-                                $size = 'small';
+                                $size = 'small';    //缩略图
 
                                 //当前目录有缩略图的时候才缓存
                                 $cacheSubDir = 'dir';
@@ -419,7 +439,6 @@ Class SiteController extends Controller {
             $msg = '403 Forbidden，禁止访问';
         }else {
             $cacheKey = $this->getCacheKey($cateId, 'snap');
-            $img_id = '';   //为保持数据格式一致，图片id传空
             $cacheSubDir = 'dir';
 
             $size = 'orignal';
@@ -427,7 +446,7 @@ Class SiteController extends Controller {
                 $size = 'small';
             }
 
-            $saved = Common::saveCacheToFile($cacheKey, compact('url', 'img_id', 'size'), $cacheSubDir);
+            $saved = Common::saveCacheToFile($cacheKey, compact('url', 'size'), $cacheSubDir);
 
             if ($saved !== false) {
                 $code = 1;