public function actionTranscode()
 {
     $model = new Resource();
     //如果数据库还有需要转码的视频,取一条记录开始转码
     while ($model->findOneTranscodeVideo()) {
         $video = $model->findOneTranscodeVideo();
         if (!$model->transcode($video)) {
             Yii::error("{$video->update_time}---{$video->name} transcode failed", 'error');
             break;
         }
     }
 }