ImageMagick can't render PDF files to JPEG

IMagick is a native PHP extension to create and modify images using the ImageMagick API. ImageMagick Studio LLC did not write nor does it maintain the IMagick extension, however, IMagick users are welcome to discuss the extension here.
gustavopi
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ImageMagick can't render PDF files to JPEG

Post by gustavopi » 2015-05-19T17:06:36-07:00

Hi. I did a simple php code that works in the host:

Code: Select all

$urlArq = $_REQUEST["url"];
$pag = $_REQUEST["pag"];
$largura = $_REQUEST["w"];
$a = (297/210);
$altura = round($largura*$a);
$Img = new Imagick();
//$Img->setSize($largura, $altura);
$Img->setResolution(150, 150);
$Img->readImage($urlArq."[".$pag."]");
$Img = $Img->flattenImages();
$Img->setImageFormat("jpeg");
$imgw = $Img->getImageWidth();
$imgh = $Img->getImageHeight();
//$image = $Img->getImageBlob();
//$image = $Img->thumbnailImage($largura, NULL);
$imagefull = imagecreatefromstring($Img->getImageBlob());
$image = imagecreatetruecolor($largura, $altura);
imagecopyresampled($image, $imagefull, 0, 0, 0, 0, $largura, $altura, $imgw, $imgh);
if($image){
	header("Content-Type: image/jpeg");
	echo(imagejpeg($image));
} else {
	echo("Erro! Imagem não criada.");
}
But in my local test server, it does not. The error in the php log is:
PHP Fatal error: Uncaught exception 'ImagickException' with message 'Postscript delegate failed `/Library/WebServer/Documents/www/sintran/apitaco/edicao-03-005-12-2013.pdf': No such file or directory @ error/pdf.c/ReadPDFImage/713' in /Library/WebServer/Documents/www/sintran/conteudo_apitaco_jpeg.php:10
It seams ImageMagick can't find Ghostscript, can't use it or can write where suppose to. I have a Mac OS X Lion, so I get the Ghostscript 9.16 from Richard Koch Home Page (http://pages.uoregon.edu/koch/). I talk with him but he said that it's better get the source code and do my own compilation. The source are in http://www.ghostscript.com. The 9.16 tar gz file didn't open so I taken 9.15. I also had to in install Xcode and Command Line Tools… all day fixing bugs! So I tried to compile using Richard's instructions, but the Terminal is full of error messages, I don't know where to start.

The gs still works, the gs -v command returns
GPL Ghostscript 9.16 (2015-03-30)
Copyright (C) 2015 Artifex Software, Inc. All rights reserved.
It means to me the version I tried to compile was not compiled or not installed.

I think I need more information, but I don't know how to get it, don't know exactly what to answer to Richard so he can help me with Ghostscript - if the problem is Ghostscript.

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magick
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Re: ImageMagick can't render PDF files to JPEG

Post by magick » 2015-05-19T17:20:11-07:00

It could be a permissions problem. Try from the command line:
  • convert -verbose /Library/WebServer/Documents/www/sintran/apitaco/edicao-03-005-12-2013.pdf page.jpg

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Re: ImageMagick can't render PDF files to JPEG

Post by gustavopi » 2015-05-19T18:13:55-07:00

It returns: -bash: convert: command not found

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Re: ImageMagick can't render PDF files to JPEG

Post by magick » 2015-05-20T05:18:13-07:00

You have ImageMagick installed since you are using it with iMagick. Find out where its installed and look for the convert command.

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Re: ImageMagick can't render PDF files to JPEG

Post by gustavopi » 2015-05-20T11:41:48-07:00

Could not find convert, only the .so module inside Mamp. So I decided to install ImageMagic using MacPorts (port install ImageMagick).

A lot of things were made, no error were found. So I try the convert test again:

Code: Select all

 convert -verbose /Library/WebServer/Documents/www/sintran/apitaco/edicao-03-005-12-2013.pdf page.jpg
/var/tmp/magick-83151B5t3M6M0Y2Tr1 PNG 595x842 595x842+0+0 8-bit sRGB 348KB 0.000u 0:00.000
/var/tmp/magick-83151B5t3M6M0Y2Tr2 PNG 595x842 595x842+0+0 8-bit sRGB 373KB 0.000u 0:00.000
/var/tmp/magick-83151B5t3M6M0Y2Tr3 PNG 595x842 595x842+0+0 8-bit sRGB 222KB 0.000u 0:00.000
/var/tmp/magick-83151B5t3M6M0Y2Tr4 PNG 595x842 595x842+0+0 8-bit sRGB 166KB 0.000u 0:00.000
/var/tmp/magick-83151B5t3M6M0Y2Tr5 PNG 595x842 595x842+0+0 8-bit sRGB 380KB 0.000u 0:00.000
/var/tmp/magick-83151B5t3M6M0Y2Tr6 PNG 595x842 595x842+0+0 8-bit sRGB 428KB 0.000u 0:00.000
/var/tmp/magick-83151B5t3M6M0Y2Tr7 PNG 595x842 595x842+0+0 8-bit sRGB 132KB 0.000u 0:00.000
/var/tmp/magick-83151B5t3M6M0Y2Tr8 PNG 595x842 595x842+0+0 8-bit sRGB 333KB 0.000u 0:00.000
/var/tmp/magick-83151B5t3M6M0Y2Tr9 PNG 595x842 595x842+0+0 8-bit sRGB 303KB 0.000u 0:00.000
/var/tmp/magick-83151B5t3M6M0Y2Tr10 PNG 595x842 595x842+0+0 8-bit sRGB 284KB 0.000u 0:00.000
/Library/WebServer/Documents/www/sintran/apitaco/edicao-03-005-12-2013.pdf[0] PDF 595x842 595x842+0+0 16-bit sRGB 348KB 0.000u 0:00.000
/Library/WebServer/Documents/www/sintran/apitaco/edicao-03-005-12-2013.pdf[1] PDF 595x842 595x842+0+0 16-bit sRGB 348KB 0.000u 0:00.000
/Library/WebServer/Documents/www/sintran/apitaco/edicao-03-005-12-2013.pdf[2] PDF 595x842 595x842+0+0 16-bit sRGB 348KB 0.000u 0:00.000
/Library/WebServer/Documents/www/sintran/apitaco/edicao-03-005-12-2013.pdf[3] PDF 595x842 595x842+0+0 16-bit sRGB 348KB 0.000u 0:00.000
/Library/WebServer/Documents/www/sintran/apitaco/edicao-03-005-12-2013.pdf[4] PDF 595x842 595x842+0+0 16-bit sRGB 348KB 0.000u 0:00.000
/Library/WebServer/Documents/www/sintran/apitaco/edicao-03-005-12-2013.pdf[5] PDF 595x842 595x842+0+0 16-bit sRGB 348KB 0.000u 0:00.000
/Library/WebServer/Documents/www/sintran/apitaco/edicao-03-005-12-2013.pdf[6] PDF 595x842 595x842+0+0 16-bit sRGB 348KB 0.000u 0:00.000
/Library/WebServer/Documents/www/sintran/apitaco/edicao-03-005-12-2013.pdf[7] PDF 595x842 595x842+0+0 16-bit sRGB 348KB 0.000u 0:00.000
/Library/WebServer/Documents/www/sintran/apitaco/edicao-03-005-12-2013.pdf[8] PDF 595x842 595x842+0+0 16-bit sRGB 348KB 0.000u 0:00.000
/Library/WebServer/Documents/www/sintran/apitaco/edicao-03-005-12-2013.pdf[9] PDF 595x842 595x842+0+0 16-bit sRGB 348KB 0.000u 0:00.000
/Library/WebServer/Documents/www/sintran/apitaco/edicao-03-005-12-2013.pdf=>page-0.jpg[0] PDF 595x842 595x842+0+0 16-bit sRGB 348KB 0.000u 0:00.000
/Library/WebServer/Documents/www/sintran/apitaco/edicao-03-005-12-2013.pdf=>page-1.jpg[1] PDF 595x842 595x842+0+0 16-bit sRGB 348KB 0.000u 0:00.000
/Library/WebServer/Documents/www/sintran/apitaco/edicao-03-005-12-2013.pdf=>page-2.jpg[2] PDF 595x842 595x842+0+0 16-bit sRGB 348KB 0.000u 0:00.000
/Library/WebServer/Documents/www/sintran/apitaco/edicao-03-005-12-2013.pdf=>page-3.jpg[3] PDF 595x842 595x842+0+0 16-bit sRGB 348KB 0.000u 0:00.000
/Library/WebServer/Documents/www/sintran/apitaco/edicao-03-005-12-2013.pdf=>page-4.jpg[4] PDF 595x842 595x842+0+0 16-bit sRGB 348KB 0.000u 0:00.000
/Library/WebServer/Documents/www/sintran/apitaco/edicao-03-005-12-2013.pdf=>page-5.jpg[5] PDF 595x842 595x842+0+0 16-bit sRGB 348KB 0.000u 0:00.000
/Library/WebServer/Documents/www/sintran/apitaco/edicao-03-005-12-2013.pdf=>page-6.jpg[6] PDF 595x842 595x842+0+0 16-bit sRGB 348KB 0.000u 0:00.000
/Library/WebServer/Documents/www/sintran/apitaco/edicao-03-005-12-2013.pdf=>page-7.jpg[7] PDF 595x842 595x842+0+0 16-bit sRGB 348KB 0.000u 0:00.000
/Library/WebServer/Documents/www/sintran/apitaco/edicao-03-005-12-2013.pdf=>page-8.jpg[8] PDF 595x842 595x842+0+0 16-bit sRGB 348KB 0.000u 0:00.000
/Library/WebServer/Documents/www/sintran/apitaco/edicao-03-005-12-2013.pdf=>page-9.jpg[9] PDF 595x842 595x842+0+0 16-bit sRGB 348KB 0.000u 0:00.000
convert: unable to open image `page-0.jpg': Permission denied @ error/blob.c/OpenBlob/2709.
[ghostscript library] -q -dQUIET -dSAFER -dBATCH -dNOPAUSE -dNOPROMPT -dMaxBitmap=500000000 -dAlignToPixels=0 -dGridFitTT=2 "-sDEVICE=pngalpha" -dTextAlphaBits=4 -dGraphicsAlphaBits=4 "-r72x72"  "-sOutputFile=/var/tmp/magick-83151B5t3M6M0Y2Tr%d" "-f/var/tmp/magick-83151-OCpXsEjUV5X" "-f/var/tmp/magick-83151gq1kAcILER2I"gustavopi-macmini:/ gustavopi$ 
It seams there was a permission problem at the end.

I try to run my php code and got the same error again. Also php info shows the same version of imagick module: 3.1.2. But I don't think I'm still at the same point, just not sure where to go now.

Bonzo
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Re: ImageMagick can't render PDF files to JPEG

Post by Bonzo » 2015-05-20T13:02:30-07:00

The first thing I would do is try something simple: try running some code on an image in the same folder as the php code.

Code: Select all

$im = new Imagick('someImage.jpg');
$im->resizeImage(100,100,Imagick::FILTER_LANCZOS,1);
$im->writeImage('output.png');
$im->destroy();

gustavopi
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Re: ImageMagick can't render PDF files to JPEG

Post by gustavopi » 2015-05-20T14:33:05-07:00

Bonzo: the test works!

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Re: ImageMagick can't render PDF files to JPEG

Post by Bonzo » 2015-05-21T00:13:57-07:00

This means Imagemagick and Imagick are working and installed correctly; I would now try the same thing with your pdf in the same folder as the code. I suspect you can not read a file outside of the localhost folder.
You could also try reading a jpg in the same folder as your original pdf which may point to a ghostscript problem if the jpg file works.

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Re: ImageMagick can't render PDF files to JPEG

Post by gustavopi » 2015-05-21T06:04:29-07:00

So, this folder I created for testing purposes, I did using FileZilla and set 777 permissions for everything, starting by the folder itself. I think there is no permissions problem here. I add a "Documento.pdf" file to test with the code…

Code: Select all

<?php
$urlArq = "Documento.pdf";
$pag = 0;
$largura = 480;
$a = (297/210);
$altura = round($largura*$a);
$Img = new Imagick();
//$Img->setSize($largura, $altura);
$Img->setResolution(150, 150);
$Img->readImage($urlArq."[".$pag."]");
$Img = $Img->flattenImages();
$Img->setImageFormat("jpeg");
$imgw = $Img->getImageWidth();
$imgh = $Img->getImageHeight();
//$image = $Img->getImageBlob();
//$image = $Img->thumbnailImage($largura, NULL);
$imagefull = imagecreatefromstring($Img->getImageBlob());
$image = imagecreatetruecolor($largura, $altura);
imagecopyresampled($image, $imagefull, 0, 0, 0, 0, $largura, $altura, $imgw, $imgh);
if($image){
	header("Content-Type: image/jpeg");
	echo(imagejpeg($image));
} else {
	echo("Erro! Imagem não criada.");
}
/*
$im = new Imagick('Foto.jpg');
$im->resizeImage(100,100,Imagick::FILTER_LANCZOS,1);
$im->writeImage('output.png');
$im->destroy();
*/
?>
And the log was…
[21-May-2015 09:56:49 America/Sao_Paulo] PHP Fatal error: Uncaught exception 'ImagickException' with message 'Postscript delegate failed `Documento.pdf': No such file or directory @ error/pdf.c/ReadPDFImage/713' in /Library/WebServer/Documents/www/teste/teste.ImageMagick.php:10
Stack trace:
#0 /Library/WebServer/Documents/www/teste/teste.ImageMagick.php(10): Imagick->readimage('Documento.pdf[0...')
#1 {main}
thrown in /Library/WebServer/Documents/www/teste/teste.ImageMagick.php on line 10
The problem really occurs when trying to read de PDF, where I think Ghostscript is called. I don't know how it works, if will be called "convert" command and write some temporary file for ImageMagick to process - maybe in this "working area" there is a permissions problem.

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Re: ImageMagick can't render PDF files to JPEG

Post by Bonzo » 2015-05-21T13:45:13-07:00

What happens if you create a variable with the image name and use that in readImage?

Code: Select all

$document = $urlArq."[".$pag."]";
// Check what $document actualy contains
echo $document;
$Img->readImage($document);

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Re: ImageMagick can't render PDF files to JPEG

Post by gustavopi » 2015-05-22T12:36:02-07:00

The $document contains "Documento.pdf[0]". I think is right because the code I show in the first post is working properly in the webserver. The problem is in my local testing server.

You can see the in the website http://www.sintran.org.br/ the ImageMagick doing it's magic! In the right side, above the text "Leia o Apitaço" will open the first page of the last edition of the Apitaço news, a PDF document. This does not happens in my local version of the page. The problem is it's holding the Ajax execution to render the, so I got to improve this page, but is difficult testing online, with everybody accessing along with my tests.

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Re: ImageMagick can't render PDF files to JPEG

Post by gustavopi » 2015-05-23T07:47:59-07:00

I did another test by copying a line from another post of this community:

Code: Select all

convert -colorspace RGB -interlace none -density 104.6x104.6 -quality 100 -bordercolor white Documento.pdf teste.jpg
I just change the file names, I don't know how this convert command works. By typing this in Terminal inside the test folder (all local files), 8 jpeg files were created, for each page of PDF document. Is not the same result as ImageMagick, the quality is poor, by I think we can say Ghostscript is working properly in the job of rendering the PDF document. The problem really seams to be how Ghostscript will work for ImageMagick. By a temporary file? In this case, where it tries to write? I think the problems might be:

1 - Ghostscript can't write were suppose to.
2 - ImageMagick can't read the file written by Ghostscript.

Anybody can say where is this doomed place?

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Re: ImageMagick can't render PDF files to JPEG

Post by magick » 2015-05-23T08:15:13-07:00

For better quality, supersample:
  • convert -colorspace RGB -interlace none -density 418.4x418.4 -quality 100 -bordercolor white Documento.pdf -resize 25% teste.jpg

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Re: ImageMagick can't render PDF files to JPEG

Post by gustavopi » 2015-05-23T11:26:20-07:00

Ok, magick, but I'm not worry about the quality right now.

I need to know how imagemagick uses ghostscript, as described in my post above.

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Re: ImageMagick can't render PDF files to JPEG

Post by snibgo » 2015-05-23T11:34:26-07:00

"-verbose" will show you the GS command. Is that what you want?
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