[置顶] PHP脚本调用ffmpeg对视频截图并拼接

目前支持MKV，MPG，MP4等常见格式的视频，其他格式有待测试

12P 一张截图平均生成时间  1.64s     100个视频,大概需要2分半左右

9P  一张截图平均生成时间  1.13s      100个视频,大概需要2分钟左右

6P  一张截图平均生成时间  0.86s      100个视频,大概需要1分半左右

3P  一张截图平均生成时间  0.54s      100个视频,大概需要1分钟左右

<?php
define('DS', DIRECTORY_SEPARATOR);
date_default_timezone_set("Asia/Shanghai");
class FileLoader
{
	//路径变量
	private $rootdir        = '';
	private $tmp			= "tmp";			//tmp 目录
	private $source			= "mpg";			//source 目录
	private $destination	= "screenshoot";	//目标截图路径
	private $emptyImageName = "empty.jpg";		//合成的背景图
	//文件数组	
	private $maxShoots	    = 12;				//最大的截图数
	private $videoInfo      = NULL;
    private $files          = array();			//文件数
	private $fileArray 		= array();			
	private $extensionArray = array("mpg","mkv","mp4","avi","3gp","mov");	//支持的格式
	private $timeArray 		= array("00:00:10","00:00:20","00:00:30","00:01:00","00:01:30","00:02:00","00:02:30","00:03:00","00:03:30","00:03:40","00:03:50","00:04:00");
	//统计变量
	private $timeStart   	= 0;
	private $timeEnd 		= 0;
	private $fileCount		= 0;
	private $successCount   = 0;
	private $failedCount    = 0;
	
	/**
	*	初始化信息
	*/	
	 function __construct()
   	{
		file_put_contents("log.txt","");
		$this->rootdir = dirname(__FILE__);    
		$count = count($this->timeArray);
				
		for($i=1;$i<=$count;$i++)
		{
			$ii = $i-1;
			$this->fileArray[$ii] = $this->tmp.DS.$i.".jpg";
		}
	}
	 
	/**
	*	当前时间，精确到小数点
	*/
	private static function microtime_float()
	{
	    list($usec, $sec)= explode(" ", microtime());
	    return ((float)$usec + (float)$sec);
	}
	
	/**
	*	00:00:00 时间转秒
	*/
	private static function timeToSec($time) 
	{
		  $p = explode(':',$time);
		  $c = count($p);
		  if ($c>1)
		  {
			   $hour    = intval($p[0]);
			   $minute  = intval($p[1]);
			   $sec     = intval($p[2]);
		  }
		  else
		  {
		  	 	throw new Exception('error time format');
		  }
		  $secs = $hour * 3600 + $minute * 60 + $sec;
		  return $secs;	 
	}
	
	/**
	*	00:00:00 时间转秒
	*/
	private static function secToTime($time) 
	{
		
		$hour = floor($time/3600);
		$min = floor(($time - $hour * 3600)/60);
		$sec = $time % 60;
		$timeStr = sprintf("%02d:%02d:%02d",$hour,$min,$sec);
		return $timeStr;	 
	}
	 
	/**
	*	获取全部文件
	*/
	 private function getFiles($dir)
	{
		$files = array();
		$dir = rtrim($dir, "/\\") . DS;
		$dh = opendir($dir);
		if ($dh == false) { return $files; }

		while (($file = readdir($dh)) != false)
		{
			if ($file{0} == '.') { continue; }

			$path = $dir . $file;
			if (is_dir($path))
			{
				$files = array_merge($files, $this->getFiles($path));
			}
			elseif (is_file($path))
			{
				$files[] = $path;
			}
		}
		closedir($dh);
		return $files;
	}
	
	/**
	*	搜索路径
	*/
	public function searchDir($sourcePath = NULL)
	{
		
		$this->timeStart = $this->microtime_float();

		if ($sourcePath) 
		{
			$this->rootdir = $sourcePath;
		} 
		
		if (file_exists($this->rootdir) && is_dir($this->rootdir))
		{
			$this->files = $this->getFiles($this->rootdir.DS.$this->source);			
		}
	
		$this->fileCount = count($this->files);
	
		foreach ($this->files as $path)
		{
			$fi = pathinfo($path);
			$flag = array_search(strtolower($fi['extension']),$this->extensionArray);
			if (!$flag) continue;
			$this->getScreenShoot(basename($path));
		}
		
		$this->timeEnd = $this->microtime_float();
		$time = $this->timeEnd - $this->timeStart;
		
		if($this->fileCount > 0)
		{
  			$str = sprintf("[TOTAL]: Cost Time:%8s | Total File:[%d] | Successed:[%d] | Failed:[%d] | Speed:%.2fs per file\n",$this->secToTime($time),$this->fileCount,$this->successCount,$this->failedCount,$time/$this->fileCount);
			file_put_contents("log.txt",$str,FILE_APPEND);	
		}
		else
		{
  			$str = sprintf("[TOTAL]: Cost Time:%8s | Total File:[%d] | Successed:[%d] | Failed:[%d] | Speed:%.2fs per file\n",$this->secToTime($time),$this->fileCount,$this->successCount,$this->failedCount,0);
			file_put_contents("log.txt",$str,FILE_APPEND);
		}	
  		
	}
	
	/**
	*	获取视频信息
	*/
	private function getVideoInfo($file){
	        $re = array();
			exec(".".DS."ffmpeg -i {$file} 2>&1", $re);
	        $info = implode("\n", $re);
			
			if(preg_match("/No such file or directory/i", $info))
			{
				return false;
			}
			
		    if(preg_match("/Invalid data/i", $info)){
	            return false;
	        }
        
	        $match = array();
	        preg_match("/\d{2,}x\d+/", $info, $match);
	        list($width, $height) = explode("x", $match[0]);
        
	        $match = array();
	        preg_match("/Duration:(.*?),/", $info, $match);
			if($match)
			{
	        	$duration = date("H:i:s", strtotime($match[1]));
        	}else
			{
				$duration = NULL;
			}	
				
	        $match = array();
	        preg_match("/bitrate:(.*kb\/s)/", $info, $match);
	        $bitrate = $match[1];
        
	        if(!$width && !$height && !$duration && !$bitrate){
	            return false;
	        }else{
	            return array(
					"file" => $file,
	                "width" => $width,
	                "height" => $height,
	                "duration" => $duration,
	                "bitrate" => $bitrate,
					"secends" => $this->timeToSec($duration)
	            );
	        }
	    }
	
	
	
	/**
	*	设置截图时间
	*/	
	private function setShootSecends($secends,$useDefault = NO)
	{	
		
		if($useDefault)
		{
			if($secends<18)
			{
				$time = 1;
			}else
			{
				$time = 5;
			}	
			
			$range = floor(($secends - $time)/ ($this->maxShoots));
			if ($range < 1) 
			{
				$range = 1;
			}
			
			$this->timeArray = array();
			for($i=0;$i<$this->maxShoots;$i++)
			{
				$this->timeArray[$i] = $this->secToTime($time);
				$time = $time + $range;
				if ($time > $secends) break;
			}
		}
	}
	
	/**
	*	拼接图片
	*/
	private function getFixedPhoto($fileName)
	{
	
		$target = $this->rootdir.DS.$this->emptyImageName;//背景图片
		$target_img = Imagecreatefromjpeg($target);
		$source= array();

		foreach ($this->fileArray as $k=>$v)
		{
			$source[$k]['source'] = Imagecreatefromjpeg($v);
			$source[$k]['size'] = getimagesize($v);
		}

		$tmpx=5;
		$tmpy=5;//图片之间的间距
		for ($i=0; $i< count($this->timeArray); $i++)
		{	
			imagecopy($target_img,$source[$i]['source'],$tmpx,$tmpy,0,0,$source[$i]['size'][0],$source[$i]['size'][1]);
			$target_img = $this->setTimeLabel($target_img,$tmpx,$tmpy,$source[$i]['size'][0],$source[$i]['size'][1],$this->timeArray[$i]);	
			$tmpx = $tmpx+ $source[$i]['size'][0];
			$tmpx = $tmpx+5;
			if(($i+1) %3 == 0){
				$tmpy = $tmpy+$source[$i]['size'][1];
				$tmpy = $tmpy+5;
				$tmpx=5;
			}
		}
		
		$target_img = $this->setVideoInfoLabel($target_img,$tmpx,$tmpy,$this->videoInfo);
		Imagejpeg($target_img,$this->rootdir.DS.$this->destination.DS.$fileName.'.jpg');	
	}
	
	/**
	*	设置时间刻度标签
	*/
    private function setTimeLabel($image,$image_x,$image_y,$image_w,$image_h,$img_text)
	{
		  imagealphablending($image,true);
   		 //设定颜色
   		  $color=imagecolorallocate($image,255,255,255);
   		  $ttf_im=imagettfbbox(30 ,0,"Arial.ttf",$this->img_text);
   		  $w = $ttf_im[2] - $ttf_im[6]; 
          $h = $ttf_im[3] - $ttf_im[7]; 
		  unset($ttf_im);
		  
   		  $txt_y     =$image_y+$image_h+$h-5;
   		  $txt_x     =$image_x+$w+5;
		   
		  imagettftext($image,30,0,$txt_x,$txt_y,$color,"Arial.ttf",$img_text);
   		  return $image; 
   	 }
	 
 	/**
 	*	设置视频信息标签
 	*/
     private function setVideoInfoLabel($image,$txt_x,$txt_y,$videoInfo)
	 {
 		  imagealphablending($image,true);
   
    	  $color=imagecolorallocate($image,0,0,0);
 
 		  imagettftext($image,32,0,100,2000+30,$color,"FZLTHJW.ttf","FileName:".basename($videoInfo["file"]));
		  imagettftext($image,32,0,1600,2000+30,$color,"Arial.ttf","Size:".$videoInfo["width"]."x".$videoInfo["height"]);
		  imagettftext($image,32,0,100,2000+120,$color,"Arial.ttf","Duration:".$videoInfo["duration"]);
		  imagettftext($image,32,0,1600,2000+120,$color,"Arial.ttf","Bitrate:".$videoInfo["bitrate"]);
    	  return $image; 
    }
	 
 	/**
 	*	屏幕截图
 	*/
 	public function getScreenShoot($fileName)
 	{
 		$fi = pathinfo($fileName);
 		$this->videoInfo = $this->getVideoInfo($this->rootdir.DS.$this->source.DS.$fileName);
		if($this->videoInfo)
		{
	 		$this->setShootSecends($this->videoInfo["secends"]);
		
	 		for ($i=0; $i< count($this->timeArray); $i++ )
	 		{
	 			$cmd=".".DS."ffmpeg -ss ". $this->timeArray[$i] ." -i ". $this->rootdir.DS.$this->source.DS.$fileName ." -y -f image2  -s 720*480 -vframes 1 ".$this->rootdir.DS.$this->fileArray[$i];	
	 			exec($cmd,$out,$status);	
	 		}
	 		$this->getFixedPhoto($fileName);
			
	   		$str = sprintf("[%s]:OK...........[%s][%2dP]%-30s\n",date("y-m-d h:i:s",time()),$this->videoInfo["duration"],count($this->timeArray),$fileName);
	   		file_put_contents("log.txt",$str,FILE_APPEND);
			$this->successCount += 1;
		}else
		{
	   		$str = sprintf("[%s]:FAILED.................................[%s][%2dP]%-30s\n",date("y-m-d h:i:s",time()),$this->videoInfo["duration"],count($this->timeArray),$fileName);
	   		file_put_contents("log.txt",$str,FILE_APPEND);	
			$this->failedCount += 1;
		}
 	}
	
	/**
	*	TODO:
	*	截取图片, 
	*	需要配置ffmpeg-php，比较麻烦，
	*	但是这个类确实挺好用的。
	*/
	public function getScreenShoot2($fileName)
	{
		if(extension_loaded('ffmpeg')){//判断ffmpeg是否载入 
			$mov = new ffmpeg_movie($this->rootdir.DS.$this->source.DS.$fileName);//视频的路径 
			$count = $mov->getFrameCount();
			$ff_frame = $mov->getFrame(floor($count/2)); 
			if($ff_frame)
			{
				$gd_image = $ff_frame->toGDImage(); 			
				$img=$this->rootdir.DS."test.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 
			}
		}else{ 
			echo "ffmpeg没有载入"; 
		} 
	}
}

$fileLoader = new FileLoader();
$fileLoader->searchDir();
?>