Legacy ImageMagick Discussions Archive

Animation is part of gif standard is it :) I need to check any kind of gif (and png). I can not know in advance if they are animated or not, but that is not a problem as long as the result values are "solid". I use PHP exec to run convert and get an array as result. From it is is easy to determine ...

(there seems to be a bracket typo, should be convert image -channel a -negate -format "%[mean]" info:) It looks like it is reporting the opacity and not the transparency and that may be what IM 6 does. I will report it and see what they say. So you say the first command might not give correct ...

Thanks a lot, seems to work fine.
What I get is a value of 255 when the image is fully transparent.

I use 6.8.3-8 2013-03-04 Q8 in Windows, and usually the latest version on Linux.

I need Imagemagick to tell me if an image (mostly gif) is rendered on a browser as fully transparent. How is that done with Imagemagick?