ImageMagick - Issue with Windows and convert function

Question

I'm trying to use imagemagick to create a simple .gif file from a few png files, using the general approach outlined here: http://www.r-bloggers.com/animated-plots-with-r/

However, I'm on a Windows 10 machine, and I think that's causing problems with the convert function as generally described here: http://www.imagemagick.org/discourse-server/viewtopic.php?t=19679

Can someone please explain how I can either change imagemagick or Windows so that it works?

Specifically the command I'm giving and the error that occurs is shown below:

convert *.png new.gif

The error:

Invalid Parameter - the.gif

Thank you for your help.

`convert` is a command, not a function. – Keith Thompson Aug 22 '16 at 19:47 — Keith Thompson, Aug 22 '16 at 19:47

score 13 · Accepted Answer · answered Jul 02 '16 at 19:50

13

You probably installed ImageMagick 7.X on your machine. This version no longer includes convert.exe and the error that you are receiving is from the convert command of Windows. You can use magick.exe instead or select Install legacy utilities (e.g. convert) during the installation to install convert.exe on your machine..

answered Jul 02 '16 at 19:50

dlemstra

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I thought convert was going to be a alias or whatever it is called for magick @dlemstra so it would still work. – Bonzo Jul 02 '16 at 20:18
Thank you to both of you. The answer that @dlemstra indicates worked. Specifically, I installed the legacy utilities, and then the convert function worked. Thank you. – AME Jul 06 '16 at 06:01
Note that `convert` is also a windows command ("converts a FAT partition to NTFS") hence the erroneous parameter (you're actually calling the "FAT2NTFS" utility from windows, which do not know the Image magick's `convert` parameters) – Xenos Mar 14 '19 at 21:32

Michel de Ruiter · Answer 2 · 2016-08-23T07:58:15.517

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Instead of convert.exe <args>, use magick.exe convert <args>.

edited Aug 23 '16 at 07:58

answered Aug 22 '16 at 19:35

Michel de Ruiter

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Imagick is a php API for Imagemagick; how is imagick.exe going to work in this case? – Bonzo Aug 22 '16 at 20:28
The name `imagick` [has been proposed](http://www.imagemagick.org/Usage/bugs/IMv7_Recommendations.txt) however. – Michel de Ruiter Aug 23 '16 at 08:17

Treefish Zhang · Answer 3 · 2016-11-09T20:39:02.343

With Version: ImageMagick 7.0.3-4 Q8 x64 2016-10-10 on my Windows 10, adding 'magick' in front of 'convert' gets rid of the 'invalid parameter' error. For example, magick convert foo.jpg -quality 60 low_foo.jpg If preferring to define the steps in a file: save the following file as convert.sh:
SRC="$1" LOW=60 magick convert $SRC.jpg -quality $LOW low_$SRC.jpg magick convert $SRC.jpg -quality $LOW low_$SRC.webp magick convert $SRC.jpg -quality $LOW -resize 50% "$SRC"_"$LOW"q_50pc.jpg magick convert $SRC.jpg -quality $LOW -resize 50% "$SRC"_"$LOW"q_50pc.webp and running sh convert.sh foo at a bash command prompt processes foo.jpg in four different ways. It bears to mention that after the installment, 'C:\Program Files\ImageMagick-7.0.3-Q8' appears first on the list at the System/Advanced System Setting/System Variable/Path.

ImageMagick - Issue with Windows and convert function

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