PHP imagick gif to jpg - background

Question

I've this gif:

https://dl.dropboxusercontent.com/u/76885657/stackoverflow/2.gif

(transparent background)

And with this code:

$im = new Imagick();    
$im->readimage("example.gif");     
$im->setImageAlphaChannel(11);    
$im->setImageBackgroundColor('white');    
$im->setImageFormat("jpg");    
$im->stripImage();    
$im->writeImage("example.jpg");    
$im->clear();    
$im->destroy();

Results:

https*://dl.dropboxusercontent.com/u/76885657/stackoverflow/3.jpg(without *)

(gold background)

But want this:

https://dl.dropboxusercontent.com/u/76885657/stackoverflow/2.jpg

(white background)

Ok, just to clarify... You want to rename your rendered jpg as 2.jpg, is that? — Dimas Pante
– Dimas Pante, Commented Jan 26, 2015 at 16:29

lucasgabmoreno · Accepted Answer · 2015-01-30 19:08:16Z

1

I've found it. Was the order!:

$im = new Imagick();    
$im->readimage("example.gif");

/ Wrong

$im->setImageBackgroundColor('white');  
$im->setImageAlphaChannel(11);

/ Write!!!

$im->setImageAlphaChannel(11);    
$im->setImageBackgroundColor('white');

/ Rest of code...

$im->setImageFormat("jpg");    
$im->stripImage();    
$im->writeImage("example.jpg");    
$im->clear();    
$im->destroy();

edited Jan 30, 2015 at 19:08

answered Jan 26, 2015 at 17:35

lucasgabmoreno

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5 Comments

aross Over a year ago

I'm not sure I understand... there are constants like Imagick::ALPHACHANNEL_SET.

lucasgabmoreno Over a year ago

You are right, maybe 11 is the number of the constant used in the imagick class to reduce the class code. I don't really know

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