Convert PDF to JPG: 64-Bit Postscript delegate. Please help

[vielhuber]

Can you convert the second one also please?

[magick]

Not sure what you mean. We're using ImageMagick 6.7.2-8, the current release and Ghostscript 9.04 and we can convert both PDF's without complaint. We get excellent results with supersampling:

• convert -density 400 test1.pdf -resize 25% test1.png

[vielhuber]

Another machine (just set up, everything new). Have got GS 9.04 and IM 6.7.2-9.

convert -density 400 test1.pdf -resize 25% test1.png

convert -density 400 test2.pdf -resize 25% test2.png


Surprisingly good results.

convert -density 400 test1.pdf -resize 25% test1.jpg

convert -density 400 test2.pdf -resize 25% test2.jpg


What's wrong with my JPG-delegate?!

[vielhuber]

Without density and resize:

convert test.pdf test.jpg

[vielhuber]

The "ghostscript"-Problem is now finished, because I can obviously produce PDF to PNG.
But it seems that the PNG to JPG conversion fails or shows a strange behaviour.

[vielhuber]

Watch this behaviour:

PNG-File


convert no.png no.jpg

JPG-File


Have you seen it before?

[magick]

Add -colorspace RGB before your JPEG image filename on the command line. Otherwise there may be a problem with your JPEG delegate library.

[vielhuber]

I made one half transparent with photoshop (to test) and the other not.

convert what.png -colorspace RGB what.jpg



I hope the command I did to load the gs libraries

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apt-get install ghostscript imagemagick libmagick9-dev libmagickcore-dev libmagickwand-dev

did not ruin my whole environment.
And yes, I did a ./configure make make install afterwards!

[fmw42]

JPG does not support transparency.

[vielhuber]

All my JPEG delegates are loaded properly:

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JBIG              --with-jbig=yes		no
JPEG v1           --with-jpeg=yes		yes
JPEG-2000         --with-jp2=yes		yes
LCMS v1           --with-lcms=yes		yes

Look at full config.log
http://vielhuber.de/files/config.log

[vielhuber]

I know that. But this behaviour wasn't seen on previous versions of IM.
How can I fix that. And in your environment everything is working.

[fmw42]

perhaps your libjpeg is old and needs upgrading or your libpng (or both)?

Also perhaps one of the delegate libraries that GS needs to use, also needs upgrading?

what do you get from

convert -list configure

look at the line starting with DELEGATES.

[vielhuber]

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DELEGATES     bzlib djvu fontconfig freetype gvc jpeg jng jp2 lcms lqr openexr png rsvg tiff x11 xml wmf zlib

Delegates seem to be OK!

I'm so happy, i did it the following way:

Code: Select all

convert test1.pdf test1.png

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convert test1.png -background white -flatten +matte test1.jpg

Result:


This works!
Is there a better way and faster way to do it?

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convert test1.pdf test1.jpg

and also

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convert -colorspace RGB test1.pdf -colorspace RGB test1.jpg

does not work.
Result:


It's the alpha channel, which gets worse when converting directly.

Thank you so much. My problem was consisting of two problems:
- Ghostscript delegates not loaded
- Conversion of PNG alpha channel to JPG

With the help of you I did both.

Another question: You have to provide commercial support for your product!

[magick]

For commercial support, post a message to http://www.imagemagick.org/script/contact.php. Choose Sponsorship Query as the issue.

[vielhuber]

Code: Select all

convert -background white -flatten test1.pdf test1.jpg

works!
The flatten parameter makes the alpha layer of the PDF disable and everything is now in combination with the new versions of IM and GS fine

Thank you again for your support.
You have to take money from companies for your knowledge!!!