Question

I am trying to convert and image to a tiff using imagemagick but am running into a problem when trying to write the file. I get an error that says:

Unable to open image…
error/blob.c/OpenBlob/2584′

This is the code I am using:

$im2 = new Imagick($image);
$im2->setImageFormat("tiff");
$im2->setImageColorSpace(5); 
$im2->writeImage("test.tiff");

$image is just a url I am passing to an image file. I am just running a simple test function to get it to work and put a test.tiff in the same folder. What could I be doing wrong here? Having trouble finding much documentation on this.

Answer 1

The argument of the Imagick constructor is to load a local image file. To load a remote image file, you should instantiate an Imagick object without arguments and either:

• download the image content and pass it to the readImageBlob method, or
• fopen the URL and pass it to the readImageFile method.

For example:

// assuming $image is an URL or path to a local file
$handle = fopen($image, 'rb');
$im2 = new Imagick();
$im2->readImageFile($handle);
$im2->setImageFormat("tiff");
$im2->setImageColorSpace(5);
$im2->writeImage("test.tiff");
fclose($handle);
$im2->destroy();