PHP调用ffmpeg对视频截图并拼接脚本

PHP脚本调用ffmpeg对视频截图并拼接，供大家参考，具体内容如下

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

<div class="jb51code">
<pre class="brush:php;">
<?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) 
{ 
  $str = sprintf("[TOTAL]: Cost Time:%8s | Total File:[%d] | Successed:[%d] | Failed:[%d] | Speed:%.2fs per filen",$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 filen",0); 
  file_put_contents("log.txt",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;
  }

  $match = array();
  preg_match("/d{2,}xd+/",$info,$match);
  list($width,$height) = explode("x",$match[0]);

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