Legacy ImageMagick Discussions Archive

Hello,

I tried to use the +quality option but regardless if I use it without a value or with a value I get the following message:

magick: InvalidArgument '+quality' '(null)' at CLI arg 2 @ error/operation.c/CLISettingOptionInfo/1243.

Is this a bug or is this correct an I'm doing something wrong?
What exactly is the effeect of +quality? My first assumption was it resets the quality setting.

Why do you think "+quality" is a valid IM option? Is it documented somewhere?

Please, always provide your IM version and platform when asking questions, since syntax may differ.

Also provide your exact command line and your images, if possible.

See the top-most post in this forum "IMPORTANT: Please Read This FIRST Before Posting" at http://www.imagemagick.org/discourse-se ... f=1&t=9620

If using Imagemagick 7, then see http://imagemagick.org/script/porting.php#cli

For novices, see

http://www.imagemagick.org/discourse-se ... f=1&t=9620
http://www.imagemagick.org/script/comma ... essing.php
http://www.imagemagick.org/Usage/reference.html
http://www.imagemagick.org/Usage/
https://github.com/ImageMagick/usage-markdown
https://imagemagick.org/script/porting.php#cli

snibgo wrote: ↑2018-11-27T07:19:01-07:00Why do you think "+quality" is a valid IM option? Is it documented somewhere?

I don't know anything about a "+quality" option, but it does show in the list from this command...

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convert -list command

It shows up in the list from several versions as recently as 7.0.8-14. I've tried various commands, and I get the same error as the OP with v6.9.10-11 and v7.0.8-14, but I get no error with v6.8.9-9 in a bash shell on Windows.

I could see it being useful in a command like this...

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convert input.png -quality 100 -resize 50% -write output.jpg +quality -resize 50% output.png

It's documented, so it should work, so it's a bug.

I'm using ImageMagick 7.0.8-14-Q16 and the +quality command is contained in the command list:

GeeMack wrote: ↑2018-11-27T10:08:26-07:00 I don't know anything about a "+quality" option, but it does show in the list from this command...
Code: Select all
convert -list command

and I found it here https://github.com/ImageMagick/ImageMag ... ion.c#L923. This way I already found out that there is for example a +format and +verbose option which are also not documented on this page https://www.imagemagick.org/script/comm ... ptions.php like +quality.

I noticed something, the following commands are working as expected:

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convert rose: -quality 100 -write output.jpg +quality output2.jpg

but if I use "magick" instead of "convert" I can easily reproduce the InvalidArgument error:

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magick rose: -quality 100 -write output.jpg +quality output2.jpg
magick: InvalidArgument '+quality' '(null)' at CLI arg 6 @ error/operation.c/CLISettingOptionInfo/1243.

I also tried out magick-script and got the same error:

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C:\temp\test>magick -script -
rose:
-quality 100
-write output.jpg
+quality
magick: InvalidArgument '+quality' '(null)' in "stdin" at line 4,column 1 @ error/operation.c/CLISettingOptionInfo/1243.

So this looks like a bug to me.

Thanks for the problem report. We can reproduce it and will have a patch to fix it in GIT master branch @ https://github.com/ImageMagick/ImageMagick later today. The patch will be available in the beta releases of ImageMagick @ http://www.imagemagick.org/download/beta/ by sometime tomorrow.

Thank you for looking into this.

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