Hi guys,
I need to resize a animated gif file without destroying the animation. Let I have a flower animated file name: flower.gif size is: 700x700, frame no: 5. I need to resize it 128x128 & 240x320 without destroy animation . Each resized animated file must hold same frame number as uploaded animated file.
How can I do it using PHP?
GUYS! please help
ANSWER: I already solve the problem.Please see my answer with detail code below.thx,riad.
You'd need to decompose the gif into frames, thumbnail and re-assemble.
Have a look at ImageMagick: http://php.net/imagick and this tutorial: http://www.phpro.org/examples/Thumbnail-From-Animated-GIF.html
if you have imagemagick access, you can do this:
system("convert big.gif -coalesce coalesce.gif");
system("convert -size 200x100 coalesce.gif -resize 200x10 small.gif");
this is most likely possible with the imagemagick plugin if you don't have system() access
NOTE: this may create a larger filesize though a smaller dimensions image due to coalescing essentially deoptimizing the image.
UPDATE: If you don't have ImageMagick access, you should be able to use a combination of the following steps to resize an animated gif (assuming you have GD access):
This is definitely much more intensive than the ImageMagick route, but it should be technically possible.
If you get it working, please share with the world!
just creat 3 folder name 1.frame_output 2.images 3.resized_frame_output and download 2 encoder and decoder class from this below link 1.Download class "GIFDecoder.class.php" from http://phpclasses.elib.com/browse/package/3234.html 2.Download class "GIFEncoder.class.php" from http://phpclasses.betablue.net/browse/package/3163.html
and then run the script name as "resize_animator.php" , creat a upload html file & Let Enjoy the script.
..save this script as .....index.php.......
<html>
<body>
<table width="500" border="0" align="center" cellpadding="0" cellspacing="1" bgcolor="#CCCCCC">
<tr>
<form action="resize_animator.php" method="post" enctype="multipart/form-data" >
<td>
<table width="100%" border="0" cellpadding="3" cellspacing="1" bgcolor="#FFFFFF">
<tr>
<td align="center"><font face="Tahoma">SELECT ANIMATED FILE</font>
<input type="file" name="uploadfile" size="20" accept="image/gif"/>
</td>
</tr>
<tr>
<td align="center"><input type="submit" name="Submit" value="PROCESS ANIMATION" /></td>
</tr>
</table>
</td>
</form>
</tr>
</table>
</body>
</html>
........................save and this script as resize_animator.php............
<?php
require "GIFDecoder.class.php";
include "GIFEncoder.class.php";
$file_name= $_FILES['uploadfile']['name'];
$file_ext = substr($file_name, -4);
$file_size=($_FILES["uploadfile"]["size"] /1024 );
if($file_ext=='.gif')
{
if($file_size > 0 && $file_size < 2000 )
{
session_start ( );
$uploaded_file = $_FILES['uploadfile']['tmp_name'];
$fp=file_get_contents($uploaded_file);
if ( $fp )
{
$_SESSION['delays'] = Array ( );
$gif = new GIFDecoder ( $fp );
$arr = $gif->GIFGetFrames ( );
$_SESSION [ 'delays' ] = $gif -> GIFGetDelays ( );
for ( $i = 0; $i < count ( $arr ); $i++ )
{
fwrite ( fopen ( ( $i < 10 ? "frame_output/$i$i_frame.gif" : "frame_output/$i_frame.gif" ), "wb" ), $arr [ $i ] );
}
}
function resize_frames($newwidth,$newheight)
{
$dir=opendir("frame_output/");
$i=0;
while($imgfile=readdir($dir))
{
if ($imgfile != "." && $imgfile!="..")
{
$imgarray[$i]=$imgfile;
$uploadedfile = "frame_output/".$imgarray[$i];
$src = imagecreatefromgif($uploadedfile);
list($width,$height)=getimagesize($uploadedfile);
$tmp=imagecreatetruecolor($newwidth,$newheight);
imagecopyresampled($tmp,$src,0,0,0,0,$newwidth,$newheight,$width,$height);
$filename = "resized_frame_output/".$imgarray[$i];
imagegif($tmp,$filename,100);
imagedestroy($src);
imagedestroy($tmp);
$i++;
}
}
closedir($dir);
if ( $dh = opendir ( "resized_frame_output/" ) )
{
while ( false !== ( $dat = readdir ( $dh ) ) )
{
if ( $dat != "." && $dat != ".." )
{
$frames [ ] = "resized_frame_output/$dat";
}
}
closedir ( $dh );
}
$gif = new GIFEncoder ( $frames,$_SESSION [ 'delays' ],0, 2, 0, 0, 0,"url" );
$data = $gif->GetAnimation ( );
$x='x';
$y='_';
$uploaded_file_name= $_FILES['uploadfile']['name'];
$actual_file_name = substr($uploaded_file_name, 0, -4);
$file_extention = substr($uploaded_file_name, -4);
$new_name=$actual_file_name.$y.$newwidth.$x.$newheight.$file_extention ;
//$output_image_name=$newwidth.$x.$newheight;
fwrite ( fopen ( "images/$new_name", "wb" ), $data );
//remove resized frames from folder
//sleep for 1 second
// usleep(2000000);
$dir = 'resized_frame_output/';
foreach(glob($dir.'*.*') as $v)
{
unlink($v);
}
} // end of function resize_frames
$gif = new GIFEncoder ( $frames,$_SESSION [ 'delays' ],0, 2, 0, 0, 0,"url" );
$data = $gif->GetAnimation ( );
$x='x';
$y='_';
$z='_p';
$uploaded_file_name= $_FILES['uploadfile']['name'];
$actual_file_name = substr($uploaded_file_name, 0, -4);
$file_extention = substr($uploaded_file_name, -4);
$new_name=$actual_file_name.$y.$newwidth.$x.$newheight.$z.$file_extention ;
//$output_image_name=$newwidth.$x.$newheight;
fwrite ( fopen ( "images/$new_name", "wb" ), $data );
//remove resized frames from folder
//sleep for 1 second
//usleep(2000000);
$dir = 'resized_frame_output/';
foreach(glob($dir.'*.*') as $v)
{
unlink($v);
}
} // end of function resize_frames
resize_frames(110,110);
resize_frames(120,160);
resize_frames(120,80);
resize_frames(128,96);
resize_frames(128,128);
resize_frames(208,208);
resize_frames(208,320);
session_destroy();
//usleep(200000);
//remove resized frames from folder
$dir = 'frame_output/';
foreach(glob($dir.'*.*') as $v)
{
unlink($v);
}
echo "<center><h1>Your Animation processing is compleated.</h1></center>";
echo "<center><h2><a href=\"index.php\">BACK TO UPLOAD PAGE</h2></center>";
} //end of file size checker
else
{
echo "<center><h2>You Upload a unfit size image .Upload a file within 2000 KB</h2></center>";
echo "<center><h2><a href=\"index.php\">BACK TO UPLOAD PAGE</h2></center>";
}
} //end of file extention checker
else
{
echo "<center><h2>Uplaod a gif file!</h2></center>";
echo "<center><h2><a href=\"index.php\">BACK TO UPLOAD PAGE</h2></center>";
}
?>
.......................LETS ENJOY............
uncomment the usleep function to see the work happen into those folders.its not necessary but i use it to see the functionality.
Hullo, sir, I am a newbie. Could you possibly reproduce the index.php source here? Thanks.