php FFMpeg - 为视频文件创建缩略图
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FFMpeg - Creating Thumbnail for Video file
提问by user1006460
I am new to php. I have installed ffmpeg in my local iis.. Is it possible to generate a thumbnail image for a flv file.? Please help..
我是 php 新手。我已经在本地 iis 中安装了 ffmpeg .. 是否可以为 flv 文件生成缩略图。？请帮忙..
回答by ravi404
Try this
尝试这个
$ffmpeg = 'ffmpeg.exe';
//video dir
$video = 'video.flv';
//where to save the image
$image = 'image.jpg';
//time to take screenshot at
$interval = 5;
//screenshot size
$size = '320x240';
//ffmpeg command
$cmd = "$ffmpeg -i $video -deinterlace -an -ss $interval -f mjpeg -t 1 -r 1 -y -s $size $image 2>&1";
$return = `$cmd`;
An explanation of the command options:
命令选项的解释：
-i filename(the source video's file path)
-deinterlace(converts interlaced video to non-interlaced form)
-an(audio recording is disabled; we don't need it for thumbnails)
-ss position(input video is decoded and dumped until the timestamp reaches position, our thumbnail's position in seconds)
-f output file format
-t duration(the output file stops writing after durationseconds)
-r fps(sets the frame rate to write at; fpsis expressed in Hertz (1/seconds); we use 1 so that we grab only one frame)
-y(overwrites the output file if it already exists)
-swidthxheight (size of the frame in pixels)
-i文件名（源视频的文件路径）
-deinterlace（将隔行视频转换为非隔行格式）
-an（音频录制被禁用；我们不需要它来制作缩略图）
-ss位置（输入视频被解码并转储，直到时间戳到达位置，我们缩略图的位置以秒为单位）
-f输出文件格式
-t持续时间（输出文件在持续时间秒后停止写入）
-r fps（设置要写入的帧速率；fps以赫兹（1/秒）表示); 我们使用 1 以便我们只抓取一帧)
-y（如果输出文件已经存在，则覆盖它）
-swidthxheight （以像素为单位的帧大小）
回答by Kiran
Following script ic created using PHP FFMPEG Library . You can grab the video information and thumbnail using the given functions
以下脚本 ic 使用 PHP FFMPEG Library 创建。您可以使用给定的功能获取视频信息和缩略图
<?php
class PHP_FFMPEG
{
function getVideoInformation($videoPath)
{
$movie = new ffmpeg_movie($videoPath,false);
$this->videoDuration = $movie->getDuration();
$this->frameCount = $movie->getFrameCount();
$this->frameRate = $movie->getFrameRate();
$this->videoTitle = $movie->getTitle();
$this->author = $movie->getAuthor() ;
$this->copyright = $movie->getCopyright();
$this->frameHeight = $movie->getFrameHeight();
$this->frameWidth = $movie->getFrameWidth();
$this->pixelFormat = $movie->getPixelFormat();
$this->bitRate = $movie->getVideoBitRate();
$this->videoCodec = $movie->getVideoCodec();
$this->audioCodec = $movie->getAudioCodec();
$this->hasAudio = $movie->hasAudio();
$this->audSampleRate = $movie->getAudioSampleRate();
$this->audBitRate = $movie->getAudioBitRate();
}
function getAudioInformation($videoPath)
{
$movie = new ffmpeg_movie($videoPath,false);
$this->audioDuration = $movie->getDuration();
$this->frameCount = $movie->getFrameCount();
$this->frameRate = $movie->getFrameRate();
$this->audioTitle = $movie->getTitle();
$this->author = $movie->getAuthor() ;
$this->copyright = $movie->getCopyright();
$this->artist = $movie->getArtist();
$this->track = $movie->getTrackNumber();
$this->bitRate = $movie->getBitRate();
$this->audioChannels = $movie->getAudioChannels();
$this->audioCodec = $movie->getAudioCodec();
$this->audSampleRate = $movie->getAudioSampleRate();
$this->audBitRate = $movie->getAudioBitRate();
}
function getThumbImage($videoPath)
{
$movie = new ffmpeg_movie($videoPath,false);
$this->videoDuration = $movie->getDuration();
$this->frameCount = $movie->getFrameCount();
$this->frameRate = $movie->getFrameRate();
$this->videoTitle = $movie->getTitle();
$this->author = $movie->getAuthor() ;
$this->copyright = $movie->getCopyright();
$this->frameHeight = $movie->getFrameHeight();
$this->frameWidth = $movie->getFrameWidth();
$capPos = ceil($this->frameCount/4);
if($this->frameWidth>120)
{
$cropWidth = ceil(($this->frameWidth-120)/2);
}
else
{
$cropWidth =0;
}
if($this->frameHeight>90)
{
$cropHeight = ceil(($this->frameHeight-90)/2);
}
else
{
$cropHeight = 0;
}
if($cropWidth%2!=0)
{
$cropWidth = $cropWidth-1;
}
if($cropHeight%2!=0)
{
$cropHeight = $cropHeight-1;
}
$frameObject = $movie->getFrame($capPos);
if($frameObject)
{
$imageName = "tmb_vid_"1212.jpg";
$tmbPath = "/home/home_Dir/public_html/uploads/thumb/".$imageName;
$frameObject->resize(120,90,0,0,0,0);
imagejpeg($frameObject->toGDImage(),$tmbPath);
}
else
{
$imageName="";
}
return $imageName;
}
}
?>
Function
功能
getThumbImage($videoPath); //pass path to video file //
will create number of thumbnails in folder specified in the function . You can alter the code according to your requirement . This works if you installed ffmpeg and php ffmpeg library .
将在函数中指定的文件夹中创建缩略图数量。您可以根据您的要求更改代码。如果您安装了 ffmpeg 和 php ffmpeg 库，这将起作用。
Refer this link http://tecserver.blogspot.in/2009/07/ffmpeg-video-conversion-tool.html
请参阅此链接 http://tecserver.blogspot.in/2009/07/ffmpeg-video-conversion-tool.html
回答by rdxhere
<?php
$W = intval($_GET['W']);
$H = intval($_GET['H']);
$pic = ''.htmlspecialchars($_GET['file']).'';
$name = 'wapadmin/'.str_replace('/','--',$pic).'.gif';
$location = 'http://'.str_replace(array('\','//'),array('/','/'), $_SERVER [ 'HTTP_HOST'].dirname($_SERVER['PHP_SELF']).'/'.$name);
if(file_exists($name)){
header('Location: '.$location, true, 301);
exit;
}
$mov = new ffmpeg_movie($pic, false);
$wn = $mov->GetFrameWidth();
$hn = $mov->GetFrameHeight();
$frame = $mov->getFrame(480);
$gd = $frame->toGDImage();
if(!$W and !$H){
$a = "131*79";
$size = explode('*',$a);
$W = round(intval($size[0]));
$H = round(intval($size[1]));
}
$new = imageCreateTrueColor($W, $H);
imageCopyResampled($new, $gd, 0, 0, 0, 0, $W, $H, $wn, $hn);
imageGif($new, $name, 100);
header('Location: '.$location, true, 301);
?>
回答by Lloyd Moore
There is no need to specify a time of 1. The ffmpeg api provides a format of image2 and the ability to pass -vframes 1.
不需要指定时间为1。ffmpeg api提供了image2的格式，并且可以通过-vframes 1。
$time = 3;
$infile = 'in.mp4';
$thumbnail = 'my_thumbnail.png';
$cmd = sprintf(
'ffmpeg -i %s -ss %s -f image2 -vframes 1 %s',
$infile, $time, $thumbnail
);
exec($cmd);
回答by Sjoerd
Yes. You can run ffmpeg from PHP using the right parameters.
是的。您可以使用正确的参数从 PHP 运行 ffmpeg 。
Using ffmpeg-php, you can use $movie->getFrame() to obtain a frame, and $frame->toGDImage() to get a GD image.
使用 ffmpeg-php，您可以使用 $movie->getFrame() 获取帧，并使用 $frame->toGDImage() 获取GD 图像。
