diff --git a/app/Console/Tasks/VodEventTask.php b/app/Console/Tasks/VodEventTask.php
index be34f31d..6439bb3c 100644
--- a/app/Console/Tasks/VodEventTask.php
+++ b/app/Console/Tasks/VodEventTask.php
@@ -57,7 +57,7 @@ class VodEventTask extends Task
         $attrs = $chapter->attrs;
 
         /**
-         * 获取不到时长，尝试通过接口获得
+         * 获取不到时长，尝试通过主动查询获取
          */
         if ($duration == 0) {
             $duration = $this->getFileDuration($fileId);
@@ -68,6 +68,7 @@ class VodEventTask extends Task
          */
         if ($duration == 0) {
             $attrs['file']['status'] = ChapterModel::FS_FAILED;
+            $attrs['duration'] = 0;
             $chapter->update(['attrs' => $attrs]);
             return;
         }
diff --git a/app/Http/Admin/Services/ChapterContent.php b/app/Http/Admin/Services/ChapterContent.php
index 5d257fc5..dec9abcd 100644
--- a/app/Http/Admin/Services/ChapterContent.php
+++ b/app/Http/Admin/Services/ChapterContent.php
@@ -133,14 +133,19 @@ class ChapterContent extends Service
 
         $vod = $chapterRepo->findChapterVod($chapter->id);
 
-        $vod->file_id = $fileId;
-        $vod->file_transcode = [];
-        $vod->update();
-
         $attrs = $chapter->attrs;
-        $attrs['duration'] = 0;
-        $attrs['file']['status'] = ChapterModel::FS_UPLOADED;
+
+        if ($fileId != $vod->file_id) {
+            $vod->file_id = $fileId;
+            $vod->file_transcode = [];
+            $vod->update();
+
+            $attrs['file']['status'] = ChapterModel::FS_UPLOADED;
+            $attrs['duration'] = 0;
+        }
+
         $chapter->attrs = $attrs;
+
         $chapter->update();
 
         $this->updateCourseVodAttrs($vod->course_id);
diff --git a/app/Http/Admin/Views/chapter/edit_lesson_vod.volt b/app/Http/Admin/Views/chapter/edit_lesson_vod.volt
index eff5554f..dcdc68de 100644
--- a/app/Http/Admin/Views/chapter/edit_lesson_vod.volt
+++ b/app/Http/Admin/Views/chapter/edit_lesson_vod.volt
@@ -70,7 +70,7 @@
                 <div class="layui-form-item">
                     <label class="layui-form-label"></label>
                     <div class="layui-input-block">
-                        <button class="layui-btn" lay-submit="true" lay-filter="go">提交</button>
+                        <button id="vod-submit" class="layui-btn layui-btn-disabled" disabled="disabled" lay-submit="true" lay-filter="go">提交</button>
                         <button type="button" class="kg-back layui-btn layui-btn-primary">返回</button>
                     </div>
                 </div>
diff --git a/public/static/admin/js/media.upload.js b/public/static/admin/js/media.upload.js
index fc303673..2bcc0656 100644
--- a/public/static/admin/js/media.upload.js
+++ b/public/static/admin/js/media.upload.js
@@ -46,6 +46,7 @@ layui.use(['jquery', 'element'], function () {
 
         uploader.done().then(function (result) {
             $('input[name=file_id]').val(result.fileId);
+            $('#vod-submit').removeAttr('disabled').removeClass('layui-btn-disabled');
             $.ajax({
                 type: 'POST',
                 url: $('#vod-form').attr('action'),