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Bug #59057 Problem with resizing animated GIFs
Submitted: 2010-02-01 15:25 UTC Modified: 2010-02-02 04:56 UTC
From: spinn909 at gmail dot com Assigned:
Status: Not a bug Package: imagick (PECL)
PHP Version: 5_3.1RC2 OS: Debian 5.0.3 x86_64
Private report: No CVE-ID: None
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 [2010-02-01 15:25 UTC] spinn909 at gmail dot com 
Description:
------------
I get strange results when trying to resize animated GIFs. Using latest ImageMagick, tried with both beta and stable versions of the PHP extension.

Reproduce code:
---------------
$im = new Imagick('animated.gif'); // 512x448px
$im->coalesceImages(); // tried both with and without this
$im->resizeImage(50, 50, Imagick::FILTER_MITCHELL, 0.5);
$im->writeImage('resized.gif');

Expected result:
----------------
The animated image, resized to 50x50px.

Actual result:
--------------
94x467px image, without animation. No errors reported.

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 [2010-02-02 02:38 UTC] mkoppanen@php.net 
See Example #5 http://php.net/manual/en/imagick.examples-1.php
 [2010-02-02 04:56 UTC] spinn909 at gmail dot com 
Thanks, this helped although I still didn't get the expected result. To get that I did the following:

$im = new Imagick("example.gif");
$im2 = $im->coalesceImages();
foreach ($im2 as $frame) {
     $frame->thumbnailImage(50, 50);
     $frame->setImagePage(50, 50, 0, 0);
}
$im2->writeImages("example_small.gif", true);
 
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