convert each pdf page to jpg

Question

i wanna convert each page of a pdf to a jpg file. Converting a single page works:

exec('/usr/local/bin/convert -density 288 -resize 50% -quality 85 -    colorspace CMYK dv.pdf[8] -colorspace RGB test.jpg');

Converting all pages does not work:

    exec('/usr/local/bin/convert -density 288 -resize 50% -quality 85 -    colorspace CMYK dv.pdf -colorspace RGB test.jpg');

What could be wrong?

sorry, i pasted the second "convert" by mistake. Code fixed. Problem still exists... — peter, Dec 17 '15 at 00:09
@peter this isn't really a php question since the php code just executing the `convert` command line program and you question is about `convert`, not php. Try running your command in a terminal and post the any errors you receive when doing that. — Kyle Kochis, Dec 17 '15 at 00:33
thx, the error is: convert: Postscript delegate failed `/home/httpd/docs/test/magazine/best/dv.pdf': No such file or directory @ pdf.c/ReadPDFImage/630. convert: missing an image filename `/home/httpd/docs/die8test2/magazine/best/ateste.jpg' @ convert.c/ConvertImageCommand/2819. — peter, Dec 17 '15 at 01:12
but the file is there - by adding a page number dv.pdf[8] converting a single page works — peter, Dec 17 '15 at 01:15

score 0 · Answer 1 · answered Dec 17 '15 at 00:04

0

you could use imagick to do this. More information can be found here at http://php.net/manual/en/imagick.setup.php

 <?php 
    $imagick = new Imagick(); 
    $imagick->readImage('myfile.pdf'); 
    $imagick->writeImages('converted.jpg', false); 
    ?>

answered Dec 17 '15 at 00:04

Juakali92

1,155
8
20

thx, that works great - but the color of images is not the same as in pdf. The pdf is CMYK. How can i get correct colors using your example? – peter Dec 17 '15 at 00:15
if color becomes inverted, read the user contributed notes at http://php.net/manual/en/imagick.setimagecolorspace.php which shows different workarounds. – Juakali92 Dec 17 '15 at 00:26
no changes... according to this post http://stackoverflow.com/questions/4830478/php-imagick-rgb-to-cmyk-inverts - php imagick is not doing it, i need to do it with imagick command line as in my original post above. So the problem still exists.. – peter Dec 17 '15 at 00:44

score 0 · Answer 2 · edited Dec 19 '15 at 02:15

0

I could not solve the problem, but i found an alternative solution - im executing Ghostscript without using Imagick:

exec(
    "'gs' '-dNOPAUSE' '-sDEVICE=jpeg' '-dUseCIEColor' '-dTextAlphaBits=4' 
    '-dGraphicsAlphaBits=4' '-o$exportPath' '-r$res' '-dJPEGQ=$quality' '$input'",
     $output
);

edited Dec 19 '15 at 02:15

Jens A. Koch

39,862
13
113
141

answered Dec 17 '15 at 05:14

peter

11
3

convert each pdf page to jpg

2 Answers2