视频码率参数调整

详情页增加一点内容

src/backend/controllers/CourseController.php

@@ -53,8 +53,13 @@ class CourseController extends Controller
 		
 		$courseware = Courseware::findOne(['course_id'=>$course->id]);
 		$class = Classes::findOne(['id'=>$course->class_id]);
+
+		/* @var $qiniu \common\components\Qiniu */
+		$qiniu = \Yii::$app->qiniu;
+		$previewUrl = $qiniu->getUrl('public', $course->preview_pic);
+		$sourceUrl = $qiniu->getUrl('video', $courseware->name);
 		
-		return $this->render('detail', compact('course', 'courseware', 'class'));
+		return $this->render('detail', compact('course', 'courseware', 'class', 'previewUrl', 'sourceUrl'));
 	}
 
 	/**

src/backend/views/course/detail.php

+<?php
+/**
+ * @var $course \common\models\Course
+ */
+
+use yii\helpers\Html;
+
+$this->title = $course->name;
+?>
+
+<p><?=$class->name?></p>
+<div><img src="<?=$previewUrl?>-m.preview"></div>
+<div><?=$course->intro?></div>
+<p>[<a href="<?=$sourceUrl?>" target="_blank">下载源视频</a>]</p>
\ No newline at end of file

src/common/libs/QiniuTranscode.php

@@ -176,10 +176,8 @@ class QiniuTranscode
 			$fopsAddon .= '/ar/'.$target['ar'];
 		}
 
-		//视频采样率对比
-		//if ($video['bit_rate'] > $target['vb']) {
-			$fopsAddon .= '/vb/'.$target['vb'];
-		//}
+		//视频采样率对比,七牛文档指出如果给出的码率大于原码率,则会使用原码率转换，但某些视频仍然会出现码率变大,所以此处加上判断
+		$fopsAddon .= '/vb/'.($video['bit_rate'] > $target['vb'] ? $target['vb'] : $video['bit_rate']);
 
 		//编码对比
 		if ($video['codec_name'] != 'h264') {