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PHP appelle ffmpeg pour prendre des captures d'écran vidéo et des exemples de scripts d'épissage à partager
- 小云云original
- 2018-01-15 10:10:062914parcourir
本文主要介绍了PHP调用ffmpeg对视频截图并拼接脚本，希望能帮助到大家。
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
<?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();
?>相关推荐：
HTML5/CSS3 诱人的实例 -模仿优酷视频截图功能的详解
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