PHP调用ffmpeg对视频截图并拼接脚本

$match = array();
preg_match("/Duration:(.*?),/",$match);
if($match)
{
$duration = date("H:i:s",strtotime($match[1]));
}else
{
$duration = NULL;
}

$match = array();
preg_match("/bitrate:(.*kb/s)/",$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,$source[$i]['size'][0],$source[$i]['size'][1]); 
  $target_img = $this->setTimeLabel($target_img,$source[$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,$this->videoInfo); 
Imagejpeg($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);
  $ttf_im=imagettfbbox(30,"Arial.ttf",$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($image,30,$txt_x,$txt_y,$color,$img_text);
  return $image;
  }

/**

• 设置视频信息标签
  */
  private function setVideoInfoLabel($image,$videoInfo)
  {
  imagealphablending($image,true);

  $color=imagecolorallocate($image,0);

  imagettftext($image,32,100,2000+30,"FZLTHJW.ttf","FileName:".basename($videoInfo["file"]));
  imagettftext($image,1600,"Size:".$videoInfo["width"]."x".$videoInfo["height"]);
  imagettftext($image,2000+120,"Duration:".$videoInfo["duration"]);
  imagettftext($image,"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);

  $str = sprintf("[%s]:OK...........[%s][%2dP]%-30sn",date("y-m-d h:i:s",time()),$this->videoInfo["duration"],count($this->timeArray),$fileName);
  file_put_contents("log.txt",FILE_APPEND);
  $this->successCount += 1;
  }else
  {
  $str = sprintf("[%s]:FAILED.................................[%s][%2dP]%-30sn",FILE_APPEND);
  $this->failedCount += 1;
  }
  }

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