Legacy ImageMagick Discussions Archive

I have jpg images that are 4096x4096,
I want to extend the canvas 300 px on both sizes centering the image on the new canvas with transparent background for the new canvas only
So I do not want to change the original image, just pad it on both sides, and convert from jpg to png for transparency background.

This command will work without extending it:
convert in.jpg -alpha set -gravity center -extent 4096x4096 out.png

This one aborts with core dump
convert in.jpg -alpha set -gravity center -extent 4696x4096 out.png

I have tried -format png -resize 4096x4096
and Updated: -background none

mogrify also fails.

This will run as a bash command on over 100,000 files, so speed and quality is best

Running on Linux Manjaro (Arch Linux Clone)
convert -version
Version: ImageMagick 6.9.9-21 Q16 x86_64 2017-10-31 http://www.imagemagick.org
Features: Cipher DPC HDRI Modules OpenCL OpenMP
Delegates (built-in): bzlib cairo fontconfig freetype gslib jng jp2 jpeg lcms lqr ltdl lzma openexr pangocairo png ps raw rsvg tiff webp wmf x xml zlib

Update: Upgrading to 7 fixed the issue.

Thanks

Try:

Thanks, but it did not help.

I recommend you try my code on a different computer/server and see if it works.

Thanks, but it did not help.

What did or did not happen?

That was it, just this machine, the other is setup the same, tired to reinstall imagemagick, no help; so this sucks.
It might be related to this:
https://www.imagemagick.org/discourse-s ... hp?t=24603
I am using opencl-nvidia for cuda in blender; just a guess, but I have it on the other machine also; the only difference I see in machines is AMD vs Intel, and its the Intel machine that is breaking, an i7.

I did need -background none, or its white by default.

Thanks, I should have tried this first, so many times this has bitten me.

Upgrading to 7 fixed it.