<?php
 AlterModifyLessons('20170531.mp4');
function AlterModifyLessons($course_id)  
    {  
        $sql = "select * from cch_teaching_flower where course_id=" . $course_id . ' and type=1';  
        $datesport = Yii::app()->db->createCommand($sql)->queryAll();  
        if (extension_loaded('ffmpeg')) {//判断ffmpeg是否载入    
            foreach ($datesport as $k => $v) {  
                $file = $v['picorvid'];  
                //$file = substr($file1,1);  
                $mov = new ffmpeg_movie(Yii::app()->params['front'] . "$file"); //视频的路径  
                $ff_frame = $mov->getFrame(20); //截取视频第2帧的图像       
                $gd_image = $ff_frame->toGDImage();  
                //return Yii::app()->params['front'] . "$file";  
                //截取地址  
                $file_path = substr($file,0,strpos($file,'.'));  
                //图片保存路径  
                $img = $_SERVER['DOCUMENT_ROOT'] . $file_path . ".jpg"; //要生成图片的绝对路径      
                imagejpeg($gd_image,$img); //创建jpg图像       
                imagedestroy($gd_image); //销毁一图像   
                $kk = "'" . "$file_path.jpg" . "'";  
                $sq2 = "INSERT INTO cch_teaching_flower (course_id,type,picorvid) VALUES($course_id,'3',$kk)";  
                $data2 = Yii::app()->db->createCommand($sq2)->execute();  
                // return $img;  
            }  
            return 'true';  
        }  
        // $file1 = '/uploads/Wildlife.wmv';  
//        $file = substr($file,1);  
//        if (extension_loaded('ffmpeg')) {//判断ffmpeg是否载入      
//            $mov = new ffmpeg_movie($_SERVER['DOCUMENT_ROOT'] . "$file"); //视频的路径  
//            $ff_frame = $mov->getFrame(20); //截取视频第2帧的图像       
//            $gd_image = $ff_frame->toGDImage();  
//            //截取地址  
//            $file_path = substr($file,0,strpos($file,'.'));  
//            //图片保存路径  
//            $img = $_SERVER['DOCUMENT_ROOT'] . $file_path . ".jpg"; //要生成图片的绝对路径      
//            imagejpeg($gd_image,$img); //创建jpg图像       
//            imagedestroy($gd_image); //销毁一图像   
//            return '/' . $file_path . ".jpg";  
//            // return $img;  
//        } else {  
//            return false;  
//        }  
    }  

	?>