Masking an animated gif

[hellocatfood]

I have an animated gif and I want to mask each frame of it then output an animated gif. I know I could separate the gif into individual frames, mask each frame and then put it back together, but just wondered if there's an easier way

Thanks

[anthony]

In what way?

Just do a rectangular crop of the animation?
http://www.imagemagick.org/Usage/anim_m ... p_viewport


Or do you want to mask each frame using another image.
You can use the multi-image layers composition for this.
http://www.imagemagick.org/Usage/anim_mods/#composite

However unless you are willing to share an example animation and mask, we can not help you further.

[hellocatfood]

So, I have this animated gif http://ubuntuone.com/p/RuN/ and I want to mask it using this image http://ubuntuone.com/p/RuK/ so that it looks a little like this, only animated. Is there a way to do this without having to separate the animated gif into individual frames?

[anthony]

Your original animation has no timing delays!

however this does the job

Code: Select all

convert drink.gif -coalesce null: mask.jpg \
            -compose CopyOpacity -layers composite \
            drink_masked.gif

the "null:" image is important to mark the end of one sequence of images and the second compose image.

[hellocatfood]

It worked, thanks so much!