How to crop gif images into circle

[bkstorm]

I have a gif image like this:


I want to crop it into a circle.
Here is the command which I use to crop images, it works fine with static images (png, jpeg, ...), but it doesn't work with animations (gif images).

Code: Select all

convert bird.png -alpha on \( +clone -channel a -evaluate multiply 0 +channel -fill white -draw 'circle 128,128 0,128' \) -compose DstIn -composite bird-circle.png

How can I do that? Thanks.
Here is information about ImageMagick:

Version: ImageMagick 6.7.8-9 2017-09-20 Q16 http://www.imagemagick.org
Copyright: Copyright (C) 1999-2012 ImageMagick Studio LLC
Features: OpenMP

[snibgo]

Your code nearly works with Gif. The trick is to use "-layers composite", and a NULL: image. See http://www.imagemagick.org/script/comma ... php#layers

I've converted to Windows BAT syntax. You'll need to convert it back to bash.

Code: Select all

convert ^
  giphy3.gif ^
  -layers coalesce ^
  -alpha on ^
  NULL: ^
  ( -clone 0 ^
    -channel a -evaluate multiply 0 +channel -fill white ^
    -draw "circle 128,128 0,128" ^
    -repage +122+122 ) ^
  -compose DstIn -layers composite ^
  bird-circle.gif

The "-repage" centralises the circle. Adjust to taste.

[bkstorm]

Thank snibgo, it works