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ImageMagick - problem with Windows and conversion function

I am trying to use imagemagick to create a simple .gif file from several png files using the general approach described here: http://www.r-bloggers.com/animated-plots-with-r/

However, I am on a Windows 10 machine, and I think this causes problems with the conversion function, as described here: http://www.imagemagick.org/discourse-server/viewtopic.php?t=19679

Can someone explain how I can either modify imagemagick or windows to make it work?

In particular, the command I give and the error that occurs are shown below:

convert *.png new.gif

Mistake:

 Invalid Parameter - the.gif

Thank you for your help.

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3 answers

You probably installed ImageMagick 7.X on your computer. This version no longer includes convert.exe , and the error you get is the Windows conversion command. Instead, you can use magick.exe or select Install legacy utilities (eg convert) during installation to install convert.exe on your computer.

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

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With version: ImageMagick 7.0.3-4 Q8 x64 2016-10-10 on my Windows 10, adding "magick" before "convert" gets rid of the "invalid parameter" error. For example, magick convert foo.jpg -quality 60 low_foo.jpg If you prefer to define 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 run sh convert.sh foo on the command line bash handles foo.jpg in four different ways. It should be noted that after the release of "C: \ Program Files \ ImageMagick-7.0.3-Q8" first appears in the list under System / Advanced System Setting / System Variable / Path.

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